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351. The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems

Author

Murphy, Joseph M Akana, Murphy, Joseph M Akana, Batalha, Natalie M, Scarsdale, Nicholas, Isaacson, Howard, Ciardi, David R, Gonzales, Erica J, Giacalone, Steven, Twicken, Joseph D, Dattilo, Anne, Fetherolf, Tara, Rubenzahl, Ryan A, Crossfield, Ian JM, Dressing, Courtney D, Fulton, Benjamin, Howard, Andrew W, Huber, Daniel, Kane, Stephen R, Petigura, Erik A, Robertson, Paul, Roy, Arpita, Weiss, Lauren M, Beard, Corey, Chontos, Ashley, Dai, Fei, Rice, Malena, Van Zandt, Judah, Lubin, Jack, Blunt, Sarah, Polanski, Alex S, Behmard, Aida, Dalba, Paul A, Hill, Michelle L, Rosenthal, Lee J, Brinkman, Casey L, Mayo, Andrew W, Turtelboom, Emma V, Angelo, Isabel, Močnik, Teo, MacDougall, Mason G, Pidhorodetska, Daria, Tyler, Dakotah, Kosiarek, Molly R, Holcomb, Rae, Louden, Emma M, Hirsch, Lea A, Gilbert, Emily A, Anderson, Jay, Valenti, Jeff A, Murphy, Joseph M Akana, Murphy, Joseph M Akana, Batalha, Natalie M, Scarsdale, Nicholas, Isaacson, Howard, Ciardi, David R, Gonzales, Erica J, Giacalone, Steven, Twicken, Joseph D, Dattilo, Anne, Fetherolf, Tara, Rubenzahl, Ryan A, Crossfield, Ian JM, Dressing, Courtney D, Fulton, Benjamin, Howard, Andrew W, Huber, Daniel, Kane, Stephen R, Petigura, Erik A, Robertson, Paul, Roy, Arpita, Weiss, Lauren M, Beard, Corey, Chontos, Ashley, Dai, Fei, Rice, Malena, Van Zandt, Judah, Lubin, Jack, Blunt, Sarah, Polanski, Alex S, Behmard, Aida, Dalba, Paul A, Hill, Michelle L, Rosenthal, Lee J, Brinkman, Casey L, Mayo, Andrew W, Turtelboom, Emma V, Angelo, Isabel, Močnik, Teo, MacDougall, Mason G, Pidhorodetska, Daria, Tyler, Dakotah, Kosiarek, Molly R, Holcomb, Rae, Louden, Emma M, Hirsch, Lea A, Gilbert, Emily A, Anderson, Jay, and Valenti, Jeff A

Abstract

With JWST’s successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission spectroscopy. Using a carefully curated target list and observations from more than 2 yr of APF-Levy and Keck-HIRES Doppler monitoring, the TESS-Keck Survey is working toward alleviating this pressure. Here we present mass measurements for 11 transiting planets in eight systems that are particularly suited to atmospheric follow-up with JWST. We also report the discovery and confirmation of a temperate super-Jovian-mass planet on a moderately eccentric orbit. The sample of eight host stars, which includes one subgiant, spans early-K to late-F spectral types (T eff = 5200-6200 K). We homogeneously derive planet parameters using a joint photometry and radial velocity modeling framework, discuss the planets’ possible bulk compositions, and comment on their prospects for atmospheric characterization.

Published
2023

352. A systematic validation of hot Neptunes in TESS data

Author

Magliano, Christian, Covone, Giovanni, Dobal, Richa, Cacciapuoti, Luca, Tonietti, Luca, Giacalone, Steven, Vines, Jose, Inno, Laura, Jenkins, James S., Lissauer, Jack J., Bieryla, Allyson, Oliva, Fabrizio, Pagano, Isabella, Kostov, Veselin, Ziegler, Carl, Ciardi, David R., Gonzales, Erica J., Dressing, Courtney D., Buchhave, Lars A., Howell, Steve B., Matson, Rachel A., Matthews, Elisabeth, Rotundi, Alessandra, Alves, Douglas, Fiscale, Stefano, Ienco, Riccardo M., Pena, Pablo, Gallo, Francesco, Tomajoli, Maria T. Muscari, Magliano, Christian, Covone, Giovanni, Dobal, Richa, Cacciapuoti, Luca, Tonietti, Luca, Giacalone, Steven, Vines, Jose, Inno, Laura, Jenkins, James S., Lissauer, Jack J., Bieryla, Allyson, Oliva, Fabrizio, Pagano, Isabella, Kostov, Veselin, Ziegler, Carl, Ciardi, David R., Gonzales, Erica J., Dressing, Courtney D., Buchhave, Lars A., Howell, Steve B., Matson, Rachel A., Matthews, Elisabeth, Rotundi, Alessandra, Alves, Douglas, Fiscale, Stefano, Ienco, Riccardo M., Pena, Pablo, Gallo, Francesco, and Tomajoli, Maria T. Muscari

Abstract

We statistically validated a sample of hot Neptune candidates applying a two-step vetting technique using dave and triceratops. We performed a systematic validation of 250 transit-like events in the Transiting Exoplanet Survey Satellite archive in the parameter region defined by P≤4d and 3R⊕≤R≤5R⊕⁠. Through our analysis, we identified 18 hot Neptune-sized candidates, with a false positive probability

Published
2023

353. TOI-1695 b:A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley

Author

Cherubim, Collin, Cloutier, Ryan, Charbonneau, David, Stockdale, Chris, Stassun, Keivan G., Schwarz, Richard P., Safonov, Boris, Mortier, Annelies, Lewin, Pablo, Latham, David W., Horne, Keith, Haywood, Raphaëlle D., Gonzales, Erica, Goliguzova, Maria V., Collins, Karen A., Ciardi, David R., Bieryla, Allyson, Belinski, Alexandre A., Wohler, Bill, Watson, Christopher A., Vanderspek, Roland, Udry, Stéphane, Sozzetti, Alessandro, Ségransan, Damien, Sasselov, Dimitar, Ricker, George R., Rice, Ken, Poretti, Ennio, Piotto, Giampaolo, Pepe, Francesco, Molinari, Emilio, Micela, Giuseppina, Mayor, Michel, Lovis, Christophe, López-Morales, Mercedes, Jenkins, Jon M., Essack, Zahra, Dumusque, Xavier, Doty, John P., Colón, Knicole D., Cameron, Andrew Collier, Buchhave, Lars A., Cherubim, Collin, Cloutier, Ryan, Charbonneau, David, Stockdale, Chris, Stassun, Keivan G., Schwarz, Richard P., Safonov, Boris, Mortier, Annelies, Lewin, Pablo, Latham, David W., Horne, Keith, Haywood, Raphaëlle D., Gonzales, Erica, Goliguzova, Maria V., Collins, Karen A., Ciardi, David R., Bieryla, Allyson, Belinski, Alexandre A., Wohler, Bill, Watson, Christopher A., Vanderspek, Roland, Udry, Stéphane, Sozzetti, Alessandro, Ségransan, Damien, Sasselov, Dimitar, Ricker, George R., Rice, Ken, Poretti, Ennio, Piotto, Giampaolo, Pepe, Francesco, Molinari, Emilio, Micela, Giuseppina, Mayor, Michel, Lovis, Christophe, López-Morales, Mercedes, Jenkins, Jon M., Essack, Zahra, Dumusque, Xavier, Doty, John P., Colón, Knicole D., Cameron, Andrew Collier, and Buchhave, Lars A.

Abstract

Characterizing the bulk compositions of transiting exoplanets within the M dwarf radius valley offers a unique means to establish whether the radius valley emerges from an atmospheric mass-loss process or is imprinted by planet formation itself. We present the confirmation of such a planet orbiting an early-M dwarf (T mag = 11.0294 ± 0.0074, M s = 0.513 ± 0.012 M ⊙, R s = 0.515 ± 0.015 R ⊙, and T eff = 3690 ± 50 K): TOI-1695 b (P = 3.13 days and R p = 1.90 − 0.14 + 0.16 R ⊕ ). TOI-1695 b’s radius and orbital period situate the planet between model predictions from thermally driven mass loss versus gas depleted formation, offering an important test case for radius valley emergence models around early-M dwarfs. We confirm the planetary nature of TOI-1695 b based on five sectors of TESS data and a suite of follow-up observations including 49 precise radial velocity measurements taken with the HARPS-N spectrograph. We measure a planetary mass of 6.36 ± 1.00 M ⊕, which reveals that TOI-1695 b is inconsistent with a purely terrestrial composition of iron and magnesium silicate, and instead is likely a water-rich planet. Our finding that TOI-1695 b is not terrestrial is inconsistent with the planetary system being sculpted by thermally driven mass loss. We present a statistical analysis of seven well-characterized planets within the M dwarf radius valley demonstrating that a thermally driven mass-loss scenario is unlikely to explain this population.

Published
2023

354. TOI-5126: A hot super-Neptune and warm Neptune pair discovered by $\textit{TESS}$ and $\textit{CHEOPS}$

Author

Fairnington, Tyler R., Nabbie, Emma, Huang, Chelsea X., Zhou, George, Foo, Orion, Millholland, Sarah, Wright, Duncan, Belinski, Alexandre A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Everett, Mark, Howell, Steve B., Lissauer, Jack J., Lund, Michael B., Murgas, Felipe, Palle, Enric, Quinn, Samuel N., Relles, Howard M., Safonov, Boris S., Schwarz, Richard P., Scott, Nicholas J., Srdoc, Gregor, Ricker, George, Vanderspek, Roland, Seager, Sara, Latham, David W., Winn, Joshua W., Jenkins, Jon M., Bouma, Luke G., Shporer, Avi, Ting, Eric B., Dragomir, Diana, Kunimoto, Michelle, Eisner, Nora L., Fairnington, Tyler R., Nabbie, Emma, Huang, Chelsea X., Zhou, George, Foo, Orion, Millholland, Sarah, Wright, Duncan, Belinski, Alexandre A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Everett, Mark, Howell, Steve B., Lissauer, Jack J., Lund, Michael B., Murgas, Felipe, Palle, Enric, Quinn, Samuel N., Relles, Howard M., Safonov, Boris S., Schwarz, Richard P., Scott, Nicholas J., Srdoc, Gregor, Ricker, George, Vanderspek, Roland, Seager, Sara, Latham, David W., Winn, Joshua W., Jenkins, Jon M., Bouma, Luke G., Shporer, Avi, Ting, Eric B., Dragomir, Diana, Kunimoto, Michelle, and Eisner, Nora L.

Abstract

We present the confirmation of a hot super-Neptune with an exterior Neptune companion orbiting a bright (V = 10.1 mag) F-dwarf identified by the $\textit{Transiting Exoplanet Survey Satellite}$ ($\textit{TESS}$). The two planets, observed in sectors 45, 46 and 48 of the $\textit{TESS}$ extended mission, are $4.74^{+0.16}_{-0.14}$ $R_{\oplus}$ and $3.86^{+0.17}_{-0.16}$ $R_{\oplus}$ with $5.4588385^{+0.0000070}_{-0.0000072}$ d and $17.8999^{+0.0018}_{-0.0013}$ d orbital periods, respectively. We also obtained precise space based photometric follow-up of the system with ESAs $\textit{CHaracterising ExOplanets Satellite}$ ($\textit{CHEOPS}$) to constrain the radius and ephemeris of TOI-5126 b. TOI 5126 b is located in the "hot Neptune Desert" and is an ideal candidate for follow-up transmission spectroscopy due to its high predicted equilibrium temperature ($T_{eq} = 1442^{+46}_{-40}$ K) implying a cloud-free atmosphere. TOI-5126 c is a warm Neptune ($T_{eq}= 971^{+31}_{-27}$ K) also suitable for follow-up. Tentative transit timing variations (TTVs) have also been identified in analysis, suggesting the presence of at least one additional planet, however this signal may be caused by spot-crossing events, necessitating further precise photometric follow-up to confirm these signals., Comment: Accepted in MNRAS, 18 pages, 14 figures

Published
2023

355. TOI-4600 b and c: Two long-period giant planets orbiting an early K dwarf

Author

Mireles, Ismael, Dragomir, Diana, Osborn, Hugh P., Hesse, Katharine, Collins, Karen A., Villanueva, Steven, Bieryla, Allyson, Ciardi, David R., Stassun, Keivan G., Harris, Mallory, Lissauer, Jack J., Schwarz, Richard P., Srdoc, Gregor, Barkaoui, Khalid, Riffeser, Arno, McLeod, Kim K., Pepper, Joshua, Grieves, Nolan, Passegger, Vera Maria, Ulmer-Moll, Solène, Rodriguez, Joseph E., Feliz, Dax L., Quinn, Samuel, Boyle, Andrew W., Fausnaugh, Michael, Kunimoto, Michelle, Rowden, Pamela, Vanderburg, Andrew, Wohler, Bill, Jenkins, Jon M., Latham, David W., Ricker, George R., Seager, Sara, Winn, Joshua N., Mireles, Ismael, Dragomir, Diana, Osborn, Hugh P., Hesse, Katharine, Collins, Karen A., Villanueva, Steven, Bieryla, Allyson, Ciardi, David R., Stassun, Keivan G., Harris, Mallory, Lissauer, Jack J., Schwarz, Richard P., Srdoc, Gregor, Barkaoui, Khalid, Riffeser, Arno, McLeod, Kim K., Pepper, Joshua, Grieves, Nolan, Passegger, Vera Maria, Ulmer-Moll, Solène, Rodriguez, Joseph E., Feliz, Dax L., Quinn, Samuel, Boyle, Andrew W., Fausnaugh, Michael, Kunimoto, Michelle, Rowden, Pamela, Vanderburg, Andrew, Wohler, Bill, Jenkins, Jon M., Latham, David W., Ricker, George R., Seager, Sara, and Winn, Joshua N.

Abstract

We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 (V=12.6, T=11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Transit Planet Candidate Working Group (TSTPC-WG). The inner planet, TOI-4600 b, has a radius of 6.80$\pm$0.31 R$_{\oplus}$ and an orbital period of 82.69 d. The outer planet, TOI-4600 c, has a radius of 9.42$\pm$0.42 R$_{\oplus}$ and an orbital period of 482.82 d, making it the longest-period confirmed or validated planet discovered by TESS to date. We combine TESS photometry and ground-based spectroscopy, photometry, and high-resolution imaging to validate the two planets. With equilibrium temperatures of 347 K and 191 K, respectively, TOI-4600 b and c add to the small but growing population of temperate giant exoplanets that bridge the gap between hot/warm Jupiters and the solar system's gas giants. TOI-4600 is a promising target for further transit and precise RV observations to measure masses and orbits for the planets as well as search for additional non-transiting planets. Additionally, with Transit Spectroscopy Metric (TSM) values of $\sim$30, both planets are amenable for atmospheric characterization with JWST. Altogether will lend insight into the formation and evolution of planet systems with multiple giant exoplanets., Comment: Accepted for publication in ApJL

Published
2023

356. TOI-332 b: a super dense Neptune found deep within the Neptunian desert

Author

Osborn, Ares, Armstrong, David J., Fernández, Jorge Fernández, Knierim, Henrik, Adibekyan, Vardan, Collins, Karen A., Delgado-Mena, Elisa, Fridlund, Malcolm, da Silva, João Gomes, Hellier, Coel, Jackson, David G., King, George W., Lillo-Box, Jorge, Matson, Rachel A., Matthews, Elisabeth C., Santos, Nuno C., Sousa, Sérgio G., Stassun, Keivan G., Tan, Thiam-Guan, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Bayliss, Daniel, Bouma, Luke G., Ciardi, David R., Collins, Kevin I., Colón, Knicole D., Crossfield, Ian J. M., Demangeon, Olivier D. S., Díaz, Rodrigo F., Dorn, Caroline, Dumusque, Xavier, Keniger, Marcelo Aron Fetzner, Figueira, Pedro, Gan, Tianjun, Goeke, Robert F., Hadjigeorghiou, Andreas, Hawthorn, Faith, Helled, Ravit, Howell, Steve B., Nielsen, Louise D., Osborn, Hugh P., Quinn, Samuel N., Sefako, Ramotholo, Shporer, Avi, Strøm, Paul A., Twicken, Joseph D., Vanderburg, Andrew, Wheatley, Peter J., Osborn, Ares, Armstrong, David J., Fernández, Jorge Fernández, Knierim, Henrik, Adibekyan, Vardan, Collins, Karen A., Delgado-Mena, Elisa, Fridlund, Malcolm, da Silva, João Gomes, Hellier, Coel, Jackson, David G., King, George W., Lillo-Box, Jorge, Matson, Rachel A., Matthews, Elisabeth C., Santos, Nuno C., Sousa, Sérgio G., Stassun, Keivan G., Tan, Thiam-Guan, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Bayliss, Daniel, Bouma, Luke G., Ciardi, David R., Collins, Kevin I., Colón, Knicole D., Crossfield, Ian J. M., Demangeon, Olivier D. S., Díaz, Rodrigo F., Dorn, Caroline, Dumusque, Xavier, Keniger, Marcelo Aron Fetzner, Figueira, Pedro, Gan, Tianjun, Goeke, Robert F., Hadjigeorghiou, Andreas, Hawthorn, Faith, Helled, Ravit, Howell, Steve B., Nielsen, Louise D., Osborn, Hugh P., Quinn, Samuel N., Sefako, Ramotholo, Shporer, Avi, Strøm, Paul A., Twicken, Joseph D., Vanderburg, Andrew, and Wheatley, Peter J.

Abstract

To date, thousands of planets have been discovered, but there are regions of the orbital parameter space that are still bare. An example is the short period and intermediate mass/radius space known as the Neptunian desert, where planets should be easy to find but discoveries remain few. This suggests unusual formation and evolution processes are responsible for the planets residing here. We present the discovery of TOI-332 b, a planet with an ultra-short period of $0.78$ d that sits firmly within the desert. It orbits a K0 dwarf with an effective temperature of $5251 \pm 71$ K. TOI-332 b has a radius of $3.20^{+0.16}_{-0.12}$ R$_{\oplus}$, smaller than that of Neptune, but an unusually large mass of $57.2 \pm 1.6$ M$_{\oplus}$. It has one of the highest densities of any Neptune-sized planet discovered thus far at $9.6^{+1.1}_{-1.3}$ gcm$^{-3}$. A 4-layer internal structure model indicates it likely has a negligible hydrogen-helium envelope, something only found for a small handful of planets this massive, and so TOI-332 b presents an interesting challenge to planetary formation theories. We find that photoevaporation cannot account for the mass loss required to strip this planet of the Jupiter-like envelope it would have been expected to accrete. We need to look towards other scenarios, such as high-eccentricity migration, giant impacts, or gap opening in the protoplanetary disc, to try and explain this unusual discovery., Comment: 20 pages, 14 figures, 6 tables, accepted for publication in MNRAS

Published
2023

357. Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST

Author

Hord, Benjamin J., Kempton, Eliza M. -R., Mikal-Evans, Thomas, Latham, David W., Ciardi, David R., Dragomir, Diana, Colón, Knicole D., Ross, Gabrielle, Vanderburg, Andrew, de Beurs, Zoe L., Collins, Karen A., Watkins, Cristilyn N., Bean, Jacob, Cowan, Nicolas B., Daylan, Tansu, Morley, Caroline V., Ih, Jegug, Baker, David, Barkaoui, Khalid, Batalha, Natalie M., Behmard, Aida, Belinski, Alexander, Benkhaldoun, Zouhair, Benni, Paul, Bernacki, Krzysztof, Bieryla, Allyson, Binnenfeld, Avraham, Bosch-Cabot, Pau, Bouchy, François, Bozza, Valerio, Brahm, Rafael, Buchhave, Lars A., Calkins, Michael, Chontos, Ashley, Clark, Catherine A., Cloutier, Ryan, Cointepas, Marion, Collins, Kevin I., Conti, Dennis M., Crossfield, Ian J. M., Dai, Fei, de Leon, Jerome P., Dransfield, Georgina, Dressing, Courtney, Dustor, Adam, Esquerdo, Gilbert, Evans, Phil, Fajardo-Acosta, Sergio B., Fiołka, Jerzy, Forés-Toribio, Raquel, Frasca, Antonio, Fukui, Akihiko, Fulton, Benjamin, Furlan, Elise, Gan, Tianjun, Gandolfi, Davide, Ghachoui, Mourad, Giacalone, Steven, Gilbert, Emily A., Gillon, Michaël, Girardin, Eric, Gonzales, Erica, Horta, Ferran Grau, Gregorio, Joao, Greklek-McKeon, Michael, Guerra, Pere, Hartman, J. D., Hellier, Coel, Hełminiak, Krzysztof G., Henning, Thomas, Hill, Michelle L., Horne, Keith, Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isaacson, Howard, Isopi, Giovanni, Jehin, Emmanuel, Jenkins, Jon M., Jensen, Eric L. N., Johnson, Marshall C., Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Krushinsky, Vadim, Lasota, Sławomir, Lee, Elena, Lewin, Pablo, Livingston, John H., Lubin, Jack, Lund, Michael B., Mallia, Franco, Mann, Christopher R., Marino, Giuseppe, Maslennikova, Nataliia, Massey, Bob, Matson, Rachel, Matthews, Elisabeth, Mayo, Andrew W., Mazeh, Tsevi, McLeod, Kim K., Michaels, Edward J., Močnik, Teo, Mori, Mayuko, Mraz, Georgia, Muñoz, Jose A., Narita, Norio, Nielsen, Louise Dyregaard, Osborn, Hugh, Palle, Enric, Panahi, Aviad, Papini, Riccardo, Polanski, Alex S., Popowicz, Adam, Pozuelos, Francisco J., Quinn, Samuel N., Radford, Don J., Reed, Phillip A., Relles, Howard M., Rice, Malena, Robertson, Paul, Rodriguez, Joseph E., Rosenthal, Lee J., Rubenzahl, Ryan A., Schanche, Nicole, Schlieder, Joshua, Schwarz, Richard P., Sefako, Ramotholo, Shporer, Avi, Sozzetti, Alessandro, Srdoc, Gregor, Stockdale, Chris, Tarasenkov, Alexander, Tan, Thiam-Guan, Timmermans, Mathilde, Ting, Eric B., Van Zandt, Judah, Vignes, JP, Waite, Ian, Watanabe, Noriharu, Weiss, Lauren M., Wittrock, Justin, Zhou, George, Ziegler, Carl, Zucker, Shay, Hord, Benjamin J., Kempton, Eliza M. -R., Mikal-Evans, Thomas, Latham, David W., Ciardi, David R., Dragomir, Diana, Colón, Knicole D., Ross, Gabrielle, Vanderburg, Andrew, de Beurs, Zoe L., Collins, Karen A., Watkins, Cristilyn N., Bean, Jacob, Cowan, Nicolas B., Daylan, Tansu, Morley, Caroline V., Ih, Jegug, Baker, David, Barkaoui, Khalid, Batalha, Natalie M., Behmard, Aida, Belinski, Alexander, Benkhaldoun, Zouhair, Benni, Paul, Bernacki, Krzysztof, Bieryla, Allyson, Binnenfeld, Avraham, Bosch-Cabot, Pau, Bouchy, François, Bozza, Valerio, Brahm, Rafael, Buchhave, Lars A., Calkins, Michael, Chontos, Ashley, Clark, Catherine A., Cloutier, Ryan, Cointepas, Marion, Collins, Kevin I., Conti, Dennis M., Crossfield, Ian J. M., Dai, Fei, de Leon, Jerome P., Dransfield, Georgina, Dressing, Courtney, Dustor, Adam, Esquerdo, Gilbert, Evans, Phil, Fajardo-Acosta, Sergio B., Fiołka, Jerzy, Forés-Toribio, Raquel, Frasca, Antonio, Fukui, Akihiko, Fulton, Benjamin, Furlan, Elise, Gan, Tianjun, Gandolfi, Davide, Ghachoui, Mourad, Giacalone, Steven, Gilbert, Emily A., Gillon, Michaël, Girardin, Eric, Gonzales, Erica, Horta, Ferran Grau, Gregorio, Joao, Greklek-McKeon, Michael, Guerra, Pere, Hartman, J. D., Hellier, Coel, Hełminiak, Krzysztof G., Henning, Thomas, Hill, Michelle L., Horne, Keith, Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isaacson, Howard, Isopi, Giovanni, Jehin, Emmanuel, Jenkins, Jon M., Jensen, Eric L. N., Johnson, Marshall C., Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Krushinsky, Vadim, Lasota, Sławomir, Lee, Elena, Lewin, Pablo, Livingston, John H., Lubin, Jack, Lund, Michael B., Mallia, Franco, Mann, Christopher R., Marino, Giuseppe, Maslennikova, Nataliia, Massey, Bob, Matson, Rachel, Matthews, Elisabeth, Mayo, Andrew W., Mazeh, Tsevi, McLeod, Kim K., Michaels, Edward J., Močnik, Teo, Mori, Mayuko, Mraz, Georgia, Muñoz, Jose A., Narita, Norio, Nielsen, Louise Dyregaard, Osborn, Hugh, Palle, Enric, Panahi, Aviad, Papini, Riccardo, Polanski, Alex S., Popowicz, Adam, Pozuelos, Francisco J., Quinn, Samuel N., Radford, Don J., Reed, Phillip A., Relles, Howard M., Rice, Malena, Robertson, Paul, Rodriguez, Joseph E., Rosenthal, Lee J., Rubenzahl, Ryan A., Schanche, Nicole, Schlieder, Joshua, Schwarz, Richard P., Sefako, Ramotholo, Shporer, Avi, Sozzetti, Alessandro, Srdoc, Gregor, Stockdale, Chris, Tarasenkov, Alexander, Tan, Thiam-Guan, Timmermans, Mathilde, Ting, Eric B., Van Zandt, Judah, Vignes, JP, Waite, Ian, Watanabe, Noriharu, Weiss, Lauren M., Wittrock, Justin, Zhou, George, Ziegler, Carl, and Zucker, Shay

Abstract

JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5,000 confirmed planets, more than 4,000 TESS planet candidates are still unconfirmed and many of the best planets for atmospheric characterization may remain to be identified. We present a sample of TESS planets and planet candidates that we identify as "best-in-class" for transmission and emission spectroscopy with JWST. These targets are sorted into bins across equilibrium temperature $T_{\mathrm{eq}}$ and planetary radius $R{_\mathrm{p}}$ and are ranked by transmission and emission spectroscopy metric (TSM and ESM, respectively) within each bin. In forming our target sample, we perform cuts for expected signal size and stellar brightness, to remove sub-optimal targets for JWST. Of the 194 targets in the resulting sample, 103 are unconfirmed TESS planet candidates, also known as TESS Objects of Interest (TOIs). We perform vetting and statistical validation analyses on these 103 targets to determine which are likely planets and which are likely false positives, incorporating ground-based follow-up from the TESS Follow-up Observation Program (TFOP) to aid the vetting and validation process. We statistically validate 23 TOIs, marginally validate 33 TOIs to varying levels of confidence, deem 29 TOIs likely false positives, and leave the dispositions for 4 TOIs as inconclusive. 14 of the 103 TOIs were confirmed independently over the course of our analysis. We provide our final best-in-class sample as a community resource for future JWST proposals and observations. We intend for this work to motivate formal confirmation and mass measurements of each validated planet and encourage more detailed analysis of individual targets by the community., Comment: Submitted to AJ. Machine-readable versions of Tables 2 and 3 are included. 40 pages, 7 figures, 3 tables

Published
2023

358. The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems

Author

Murphy, Joseph M. Akana, Batalha, Natalie M., Scarsdale, Nicholas, Isaacson, Howard, Ciardi, David R., Gonzales, Erica J., Giacalone, Steven, Twicken, Joseph D., Dattilo, Anne, Fetherolf, Tara, Rubenzahl, Ryan A., Crossfield, Ian J. M., Dressing, Courtney D., Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Kane, Stephen R., Petigura, Erik A., Robertson, Paul, Roy, Arpita, Weiss, Lauren M., Beard, Corey, Chontos, Ashley, Dai, Fei, Rice, Malena, Van Zandt, Judah, Lubin, Jack, Blunt, Sarah, Polanski, Alex S., Behmard, Aida, Dalba, Paul A., Hill, Michelle L., Rosenthal, Lee J., Brinkman, Casey L., Mayo, Andrew W., Turtelboom, Emma V., Angelo, Isabel, Močnik, Teo, MacDougall, Mason G., Pidhorodetska, Daria, Tyler, Dakotah, Kosiarek, Molly R., Holcomb, Rae, Louden, Emma M., Hirsch, Lea A., Anderson, Jay, Valenti, Jeff A., Murphy, Joseph M. Akana, Batalha, Natalie M., Scarsdale, Nicholas, Isaacson, Howard, Ciardi, David R., Gonzales, Erica J., Giacalone, Steven, Twicken, Joseph D., Dattilo, Anne, Fetherolf, Tara, Rubenzahl, Ryan A., Crossfield, Ian J. M., Dressing, Courtney D., Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Kane, Stephen R., Petigura, Erik A., Robertson, Paul, Roy, Arpita, Weiss, Lauren M., Beard, Corey, Chontos, Ashley, Dai, Fei, Rice, Malena, Van Zandt, Judah, Lubin, Jack, Blunt, Sarah, Polanski, Alex S., Behmard, Aida, Dalba, Paul A., Hill, Michelle L., Rosenthal, Lee J., Brinkman, Casey L., Mayo, Andrew W., Turtelboom, Emma V., Angelo, Isabel, Močnik, Teo, MacDougall, Mason G., Pidhorodetska, Daria, Tyler, Dakotah, Kosiarek, Molly R., Holcomb, Rae, Louden, Emma M., Hirsch, Lea A., Anderson, Jay, and Valenti, Jeff A.

Abstract

With JWST's successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission spectroscopy. Using a carefully curated target list and more than two years' worth of APF-Levy and Keck-HIRES Doppler monitoring, the TESS-Keck Survey is working toward alleviating this pressure. Here we present mass measurements for 11 transiting planets in eight systems that are particularly suited to atmospheric follow-up with JWST. We also report the discovery and confirmation of a temperate super-Jovian-mass planet on a moderately eccentric orbit. The sample of eight host stars, which includes one subgiant, spans early-K to late-F spectral types ($T_\mathrm{eff} =$ 5200--6200 K). We homogeneously derive planet parameters using a joint photometry and radial velocity modeling framework, discuss the planets' possible bulk compositions, and comment on their prospects for atmospheric characterization., Comment: Accepted for publication in The Astronomical Journal on 2023-Jun-22. 60 pages, 17 Tables, 28 Figures

Published
2023

359. TESS and CHEOPS Discover Two Warm Sub-Neptunes Transiting the Bright K-dwarf HD 15906

Author

Tuson, Amy, Queloz, Didier, Osborn, Hugh P., Wilson, Thomas G., Hooton, Matthew J., Beck, Mathias, Lendl, Monika, Olofsson, Göran, Fortier, Andrea, Bonfanti, Andrea, Brandeker, Alexis, Buchhave, Lars A., Cameron, Andrew Collier, Ciardi, David R., Collins, Karen A., Gandolfi, Davide, Garai, Zoltan, Giacalone, Steven, da Silva, João Gomes, Howell, Steve B., Patel, Jayshil A., Persson, Carina M., Serrano, Luisa M., Sousa, Sérgio G., Ulmer-Moll, Solène, Vanderburg, Andrew, Ziegler, Carl, Alibert, Yann, Alonso, Roi, Anglada, Guillem, Bárczy, Tamas, Navascues, David Barrado, Barros, Susana C. C., Baumjohann, Wolfgang, Beck, Thomas, Benz, Willy, Billot, Nicolas, Bonfils, Xavier, Borsato, Luca, Broeg, Christopher, Cabrera, Juan, Charnoz, Sébastien, Conti, Dennis M., Csizmadia, Szilard, Cubillos, Patricio E., Davies, Melvyn B., Deleuil, Magali, Delrez, Laetitia, Demangeon, Olivier D. S., Demory, Brice-Olivier, Dragomir, Diana, Dressing, Courtney D., Ehrenreich, David, Erikson, Anders, Essack, Zahra, Farinato, Jacopo, Fossati, Luca, Fridlund, Malcolm, Furlan, Elise, Gill, Holden, Gillon, Michaël, Gnilka, Crystal L., Gonzales, Erica, Güdel, Manuel, Günther, Maximilian N., Hoyer, Sergio, Isaak, Kate G., Jenkins, Jon M., Kiss, Laszlo L., Laskar, Jacques, Latham, David W., Law, Nicholas, Etangs, Alain Lecavelier des, Curto, Gaspare Lo, Lovis, Christophe, Luque, Rafael, Magrin, Demetrio, Mann, Andrew W., Maxted, Pierre F. L., Mayor, Michel, McDermott, Scott, Mecina, Marko, Mordasini, Christoph, Mortier, Annelies, Nascimbeni, Valerio, Ottensamer, Roland, Pagano, Isabella, Pallé, Enric, Peter, Gisbert, Piotto, Giampaolo, Pollacco, Don, Pritchard, Tyler, Ragazzoni, Roberto, Rando, Nicola, Ratti, Francesco, Rauer, Heike, Ribas, Ignasi, Ricker, George R., Rieder, Martin, Santos, Nuno C., Savel, Arjun B., Scandariato, Gaetano, Schwarz, Richard P., Seager, Sara, Ségransan, Damien, Shporer, Avi, Simon, Attila E., Smith, Alexis M. S., Steller, Manfred, Stockdale, Chris, Szabó, Gyula M., Thomas, Nicolas, Torres, Guillermo, Tronsgaard, René, Udry, Stéphane, Ulmer, Bernd, Van Grootel, Valérie, Vanderspek, Roland, Venturini, Julia, Walton, Nicholas A., Winn, Joshua N., Wohler, Bill, Tuson, Amy, Queloz, Didier, Osborn, Hugh P., Wilson, Thomas G., Hooton, Matthew J., Beck, Mathias, Lendl, Monika, Olofsson, Göran, Fortier, Andrea, Bonfanti, Andrea, Brandeker, Alexis, Buchhave, Lars A., Cameron, Andrew Collier, Ciardi, David R., Collins, Karen A., Gandolfi, Davide, Garai, Zoltan, Giacalone, Steven, da Silva, João Gomes, Howell, Steve B., Patel, Jayshil A., Persson, Carina M., Serrano, Luisa M., Sousa, Sérgio G., Ulmer-Moll, Solène, Vanderburg, Andrew, Ziegler, Carl, Alibert, Yann, Alonso, Roi, Anglada, Guillem, Bárczy, Tamas, Navascues, David Barrado, Barros, Susana C. C., Baumjohann, Wolfgang, Beck, Thomas, Benz, Willy, Billot, Nicolas, Bonfils, Xavier, Borsato, Luca, Broeg, Christopher, Cabrera, Juan, Charnoz, Sébastien, Conti, Dennis M., Csizmadia, Szilard, Cubillos, Patricio E., Davies, Melvyn B., Deleuil, Magali, Delrez, Laetitia, Demangeon, Olivier D. S., Demory, Brice-Olivier, Dragomir, Diana, Dressing, Courtney D., Ehrenreich, David, Erikson, Anders, Essack, Zahra, Farinato, Jacopo, Fossati, Luca, Fridlund, Malcolm, Furlan, Elise, Gill, Holden, Gillon, Michaël, Gnilka, Crystal L., Gonzales, Erica, Güdel, Manuel, Günther, Maximilian N., Hoyer, Sergio, Isaak, Kate G., Jenkins, Jon M., Kiss, Laszlo L., Laskar, Jacques, Latham, David W., Law, Nicholas, Etangs, Alain Lecavelier des, Curto, Gaspare Lo, Lovis, Christophe, Luque, Rafael, Magrin, Demetrio, Mann, Andrew W., Maxted, Pierre F. L., Mayor, Michel, McDermott, Scott, Mecina, Marko, Mordasini, Christoph, Mortier, Annelies, Nascimbeni, Valerio, Ottensamer, Roland, Pagano, Isabella, Pallé, Enric, Peter, Gisbert, Piotto, Giampaolo, Pollacco, Don, Pritchard, Tyler, Ragazzoni, Roberto, Rando, Nicola, Ratti, Francesco, Rauer, Heike, Ribas, Ignasi, Ricker, George R., Rieder, Martin, Santos, Nuno C., Savel, Arjun B., Scandariato, Gaetano, Schwarz, Richard P., Seager, Sara, Ségransan, Damien, Shporer, Avi, Simon, Attila E., Smith, Alexis M. S., Steller, Manfred, Stockdale, Chris, Szabó, Gyula M., Thomas, Nicolas, Torres, Guillermo, Tronsgaard, René, Udry, Stéphane, Ulmer, Bernd, Van Grootel, Valérie, Vanderspek, Roland, Venturini, Julia, Walton, Nicholas A., Winn, Joshua N., and Wohler, Bill

Abstract

We report the discovery of two warm sub-Neptunes transiting the bright (G = 9.5 mag) K-dwarf HD 15906 (TOI 461, TIC 4646810). This star was observed by the Transiting Exoplanet Survey Satellite (TESS) in sectors 4 and 31, revealing two small transiting planets. The inner planet, HD 15906 b, was detected with an unambiguous period but the outer planet, HD 15906 c, showed only two transits separated by $\sim$ 734 days, leading to 36 possible values of its period. We performed follow-up observations with the CHaracterising ExOPlanet Satellite (CHEOPS) to confirm the true period of HD 15906 c and improve the radius precision of the two planets. From TESS, CHEOPS and additional ground-based photometry, we find that HD 15906 b has a radius of 2.24 $\pm$ 0.08 R$_\oplus$ and a period of 10.924709 $\pm$ 0.000032 days, whilst HD 15906 c has a radius of 2.93$^{+0.07}_{-0.06}$ R$_\oplus$ and a period of 21.583298$^{+0.000052}_{-0.000055}$ days. Assuming zero bond albedo and full day-night heat redistribution, the inner and outer planet have equilibrium temperatures of 668 $\pm$ 13 K and 532 $\pm$ 10 K, respectively. The HD 15906 system has become one of only six multiplanet systems with two warm ($\lesssim$ 700 K) sub-Neptune sized planets transiting a bright star (G $\leq$ 10 mag). It is an excellent target for detailed characterisation studies to constrain the composition of sub-Neptune planets and test theories of planet formation and evolution., Comment: 30 pages, 20 figures, 11 tables (including appendix). Published in MNRAS

Published
2023
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360. A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654

Author

Dai, Fei, Schlaufman, Kevin C., Reggiani, Henrique, Bouma, Luke, Howard, Andrew W., Chontos, Ashley, Pidhorodetska, Daria, Van Zandt, Judah, Murphy, Joseph M. Akana, Rubenzahl, Ryan A., Polanski, Alex S., Lubin, Jack, Beard, Corey, Giacalone, Steven, Holcomb, Rae, Batalha, Natalie M., Crossfield, Ian, Dressing, Courtney, Fulton, Benjamin, Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Petigura, Erik A., Robertson, Paul, Weiss, Lauren M., Belinski, Alexander A., Boyle, Andrew W., Burke, Christopher J., Castro-González, Amadeo, Ciardi, David R., Daylan, Tansu, Fukui, Akihiko, Gill, Holden, Guerrero, Natalia M., Hellier, Coel, Howell, Steve B., Lillo-Box, Jorge, Murgas, Felipe, Narita, Norio, Pallé, Enric, Rodriguez, David R., Savel, Arjun B., Shporer, Avi, Stassun, Keivan G., Striegel, Stephanie, Caldwell, Douglas A., Jenkins, Jon M., Ricker, George R., Seager, Sara, Vanderspek, Roland, Winn, Joshua N., Dai, Fei, Schlaufman, Kevin C., Reggiani, Henrique, Bouma, Luke, Howard, Andrew W., Chontos, Ashley, Pidhorodetska, Daria, Van Zandt, Judah, Murphy, Joseph M. Akana, Rubenzahl, Ryan A., Polanski, Alex S., Lubin, Jack, Beard, Corey, Giacalone, Steven, Holcomb, Rae, Batalha, Natalie M., Crossfield, Ian, Dressing, Courtney, Fulton, Benjamin, Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Petigura, Erik A., Robertson, Paul, Weiss, Lauren M., Belinski, Alexander A., Boyle, Andrew W., Burke, Christopher J., Castro-González, Amadeo, Ciardi, David R., Daylan, Tansu, Fukui, Akihiko, Gill, Holden, Guerrero, Natalia M., Hellier, Coel, Howell, Steve B., Lillo-Box, Jorge, Murgas, Felipe, Narita, Norio, Pallé, Enric, Rodriguez, David R., Savel, Arjun B., Shporer, Avi, Stassun, Keivan G., Striegel, Stephanie, Caldwell, Douglas A., Jenkins, Jon M., Ricker, George R., Seager, Sara, Vanderspek, Roland, and Winn, Joshua N.

Abstract

We report the discovery and Doppler mass measurement of a 7.4-day 2.3-$R_\oplus$ mini-Neptune around a metal-poor K dwarf BD+29 2654 (TOI-2018). Based on a high-resolution Keck/HIRES spectrum, the Gaia parallax, and multi-wavelength photometry from the ultraviolet to the mid-infrared, we found that the host star has $T_{\text{eff}}=4174^{+34}_{-42}$ K, $\log{g}=4.62^{+0.02}_{-0.03}$, $[\text{Fe/H}]=-0.58\pm0.18$, $M_{\ast}=0.57\pm0.02~M_{\odot}$, and $R_{\ast}=0.62\pm0.01~R_{\odot}$. Precise Doppler measurements with Keck/HIRES revealed a planetary mass of $M_{\text{p}}=9.2\pm2.1~M_{\oplus}$ for TOI-2018 b. TOI-2018 b has a mass and radius that are consistent with an Earth-like core with a $\sim1\%$-by-mass hydrogen/helium envelope, or an ice-rock mixture. The mass of TOI-2018 b is close to the threshold for run-away accretion and hence giant planet formation. Such a threshold is predicted to be around 10$M_\oplus$ or lower for a low-metallicity (low-opacity) environment. If TOI-2018 b is a planetary core that failed to undergo run-away accretion, it may underline the reason why giant planets are rare around low-metallicity host stars (one possibility is their shorter disk lifetimes). With a K-band magnitude of 7.1, TOI-2018 b may be a suitable target for transmission spectroscopy with the James Webb Space Telescope. The system is also amenable to metastable Helium observation; the detection of a Helium exosphere would help distinguish between a H/He enveloped planet and a water world., Comment: 10 figures, 5 tables, accepted to AAS Journals

Published
2023
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361. TOI-908: a planet at the edge of the Neptune desert transiting a G-type star

Author

Hawthorn, Faith, Bayliss, Daniel, Armstrong, David J., Fernández, Jorge Fernández, Osborn, Ares, Sousa, Sérgio G., Adibekyan, Vardan, Davoult, Jeanne, Collins, Karen A., Alibert, Yann, Barros, Susana C. C., Bouchy, François, Brogi, Matteo, Ciardi, David R., Daylan, Tansu, Mena, Elisa Delgado, Demangeon, Olivier D. S., Díaz, Rodrigo F., Gan, Tianjun, Horne, Keith, Hoyer, Sergio, Levine, Alan M., Lillo-Box, Jorge, Nielsen, Louise D., Osborn, Hugh P., Ricker, George R., Rodrigues, José, Santos, Nuno C., Schwarz, Richard P., Seager, Sara, Bell, Juan Serrano, Shporer, Avi, Stockdale, Chris, Strøm, Paul A., Tenenbaum, Peter, Udry, Stéphane, Wheatley, Peter J., Winn, Joshua N., Ziegler, Carl, Hawthorn, Faith, Bayliss, Daniel, Armstrong, David J., Fernández, Jorge Fernández, Osborn, Ares, Sousa, Sérgio G., Adibekyan, Vardan, Davoult, Jeanne, Collins, Karen A., Alibert, Yann, Barros, Susana C. C., Bouchy, François, Brogi, Matteo, Ciardi, David R., Daylan, Tansu, Mena, Elisa Delgado, Demangeon, Olivier D. S., Díaz, Rodrigo F., Gan, Tianjun, Horne, Keith, Hoyer, Sergio, Levine, Alan M., Lillo-Box, Jorge, Nielsen, Louise D., Osborn, Hugh P., Ricker, George R., Rodrigues, José, Santos, Nuno C., Schwarz, Richard P., Seager, Sara, Bell, Juan Serrano, Shporer, Avi, Stockdale, Chris, Strøm, Paul A., Tenenbaum, Peter, Udry, Stéphane, Wheatley, Peter J., Winn, Joshua N., and Ziegler, Carl

Abstract

We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28 and 39. TOI-908 is a T = 10.7 mag G-dwarf ($T_{eff}$ = 5626 $\pm$ 61 K) solar-like star with a mass of 0.950 $\pm$ 0.010 $M_{\odot}$ and a radius of 1.028 $\pm$ 0.030 $R_{\odot}$. The planet, TOI-908 b, is a 3.18 $\pm$ 0.16 $R_{\oplus}$ planet in a 3.18 day orbit. Radial velocity measurements from HARPS reveal TOI-908 b has a mass of approximately 16.1 $\pm$ 4.1 $M_{\oplus}$ , resulting in a bulk planetary density of 2.7+0.2-0.4 g cm-3. TOI-908 b lies in a sparsely-populated region of parameter space known as the Neptune desert. The planet likely began its life as a sub-Saturn planet before it experienced significant photoevaporation due to X-rays and extreme ultraviolet radiation from its host star, and is likely to continue evaporating, losing a significant fraction of its residual envelope mass., Comment: 17 pages, 17 figures

Published
2023
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362. Two Warm Neptunes transiting HIP 9618 revealed by TESS & Cheops

Author

Osborn, Hugh P., Nowak, Grzegorz, Hébrard, Guillaume, Masseron, Thomas, Lillo-Box, J., Pallé, Enric, Bekkelien, Anja, Florén, Hans-Gustav, Guterman, Pascal, Simon, Attila E., Adibekyan, V., Bieryla, Allyson, Borsato, Luca, Brandeker, Alexis, Ciardi, David R., Cameron, Andrew Collier, Collins, Karen A., Egger, Jo A., Gandolfi, Davide, Hooton, Matthew J., Latham, David W., Lendl, Monika, Matthews, Elisabeth C., Tuson, Amy, Ulmer-Moll, Solène, Vanderburg, Andrew, Wilson, Thomas G., Ziegler, Carl, Alibert, Yann, Alonso, Roi, Anglada, Guillem, Arnold, Luc, Asquier, Joel, Navascues, David Barrado y, Baumjohann, Wolfgang, Beck, Thomas, Belinski, Alexandr A., Benz, Willy, Biondi, Federico, Boisse, Isabelle, Bonfils, Xavier, Broeg, Christopher, Buchhave, Lars A., Bárczy, Tamas, Barros, S. C. C., Cabrera, Juan, Guillen, Carlos Cardona, Carleo, Ilaria, Castro-González, Amadeo, Charnoz, Sébastien, Christiansen, Jessie, Cortes-Zuleta, Pia, Csizmadia, Szilard, Dalal, Shweta, Davies, Melvyn B., Deleuil, Magali, Delfosse, Xavier, Delrez, Laetitia, Demory, Brice-Olivier, Dunlavey, Ava B., Ehrenreich, David, Erikson, Anders, Fernandes, Rachel B., Fortier, Andrea, Forveille, Thierry, Fossati, Luca, Fridlund, Malcolm, Gillon, Michaël, Goeke, Robert F., Goliguzova, Maria V., Gonzales, Erica J., Günther, M. N., Güdel, Manuel, Heidari, Neda, Henze, Christopher E., Howell, Steve, Hoyer, Sergio, Frey, Jonas Immanuel, Isaak, Kate G., Jenkins, Jon M., Kiefer, Flavien, Kiss, Laszlo, Korth, Judith, Maxted, Pierre F. L., Laskar, Jacques, Etangs, Alain Lecavelier des, Lovis, Christophe, Lund, Michael B., Luque, Rafa, Magrin, Demetrio, Almenara, Jose Manuel, Martioli, Eder, Mecina, Marko, Medina, Jennifer V., Moldovan, Daniel, Morales-Calderón, María, Morello, Giuseppe, Moutou, Claire, Murgas, Felipe, Jensen, Eric L. N., Nascimbeni, Valerio, Olofsson, Göran, Ottensamer, Roland, Pagano, Isabella, Peter, Gisbert, Piotto, Giampaolo, Pollacco, Don, Queloz, Didier, Ragazzoni, Roberto, Rando, Nicola, Rauer, Heike, Ribas, Ignasi, Ricker, George, Demangeon, Olivier D. S., Smith, Alexis M. S., Santos, Nuno, Scandariato, Gaetano, Seager, Sara, Sousa, Sergio G., Steller, Manfred, Szabó, Gyula M., Ségransan, Damien, Thomas, Nicolas, Udry, Stéphane, Ulmer, Bernd, Van Grootel, Valerie, Vanderspek, Roland, Walton, Nicholas, Winn, Joshua N., Osborn, Hugh P., Nowak, Grzegorz, Hébrard, Guillaume, Masseron, Thomas, Lillo-Box, J., Pallé, Enric, Bekkelien, Anja, Florén, Hans-Gustav, Guterman, Pascal, Simon, Attila E., Adibekyan, V., Bieryla, Allyson, Borsato, Luca, Brandeker, Alexis, Ciardi, David R., Cameron, Andrew Collier, Collins, Karen A., Egger, Jo A., Gandolfi, Davide, Hooton, Matthew J., Latham, David W., Lendl, Monika, Matthews, Elisabeth C., Tuson, Amy, Ulmer-Moll, Solène, Vanderburg, Andrew, Wilson, Thomas G., Ziegler, Carl, Alibert, Yann, Alonso, Roi, Anglada, Guillem, Arnold, Luc, Asquier, Joel, Navascues, David Barrado y, Baumjohann, Wolfgang, Beck, Thomas, Belinski, Alexandr A., Benz, Willy, Biondi, Federico, Boisse, Isabelle, Bonfils, Xavier, Broeg, Christopher, Buchhave, Lars A., Bárczy, Tamas, Barros, S. C. C., Cabrera, Juan, Guillen, Carlos Cardona, Carleo, Ilaria, Castro-González, Amadeo, Charnoz, Sébastien, Christiansen, Jessie, Cortes-Zuleta, Pia, Csizmadia, Szilard, Dalal, Shweta, Davies, Melvyn B., Deleuil, Magali, Delfosse, Xavier, Delrez, Laetitia, Demory, Brice-Olivier, Dunlavey, Ava B., Ehrenreich, David, Erikson, Anders, Fernandes, Rachel B., Fortier, Andrea, Forveille, Thierry, Fossati, Luca, Fridlund, Malcolm, Gillon, Michaël, Goeke, Robert F., Goliguzova, Maria V., Gonzales, Erica J., Günther, M. N., Güdel, Manuel, Heidari, Neda, Henze, Christopher E., Howell, Steve, Hoyer, Sergio, Frey, Jonas Immanuel, Isaak, Kate G., Jenkins, Jon M., Kiefer, Flavien, Kiss, Laszlo, Korth, Judith, Maxted, Pierre F. L., Laskar, Jacques, Etangs, Alain Lecavelier des, Lovis, Christophe, Lund, Michael B., Luque, Rafa, Magrin, Demetrio, Almenara, Jose Manuel, Martioli, Eder, Mecina, Marko, Medina, Jennifer V., Moldovan, Daniel, Morales-Calderón, María, Morello, Giuseppe, Moutou, Claire, Murgas, Felipe, Jensen, Eric L. N., Nascimbeni, Valerio, Olofsson, Göran, Ottensamer, Roland, Pagano, Isabella, Peter, Gisbert, Piotto, Giampaolo, Pollacco, Don, Queloz, Didier, Ragazzoni, Roberto, Rando, Nicola, Rauer, Heike, Ribas, Ignasi, Ricker, George, Demangeon, Olivier D. S., Smith, Alexis M. S., Santos, Nuno, Scandariato, Gaetano, Seager, Sara, Sousa, Sergio G., Steller, Manfred, Szabó, Gyula M., Ségransan, Damien, Thomas, Nicolas, Udry, Stéphane, Ulmer, Bernd, Van Grootel, Valerie, Vanderspek, Roland, Walton, Nicholas, and Winn, Joshua N.

Abstract

HIP 9618 (HD 12572, TOI-1471, TIC 306263608) is a bright ($G=9.0$ mag) solar analogue. TESS photometry revealed the star to have two candidate planets with radii of $3.9 \pm 0.044$ $R_\oplus$ (HIP 9618 b) and $3.343 \pm 0.039$ $R_\oplus$ (HIP 9618 c). While the 20.77291 day period of HIP 9618 b was measured unambiguously, HIP 9618 c showed only two transits separated by a 680-day gap in the time series, leaving many possibilities for the period. To solve this issue, CHEOPS performed targeted photometry of period aliases to attempt to recover the true period of planet c, and successfully determined the true period to be 52.56349 d. High-resolution spectroscopy with HARPS-N, SOPHIE and CAFE revealed a mass of $10.0 \pm 3.1 M_\oplus$ for HIP 9618 b, which, according to our interior structure models, corresponds to a $6.8\pm1.4\%$ gas fraction. HIP 9618 c appears to have a lower mass than HIP 9618 b, with a 3-sigma upper limit of $< 18M_\oplus$. Follow-up and archival RV measurements also reveal a clear long-term trend which, when combined with imaging and astrometric information, reveal a low-mass companion ($0.08^{+0.12}_{-0.05} M_\odot$) orbiting at $26^{+19}_{-11}$ au. This detection makes HIP 9618 one of only five bright ($K<8$ mag) transiting multi-planet systems known to host a planet with $P>50$ d, opening the door for the atmospheric characterisation of warm ($T_{\rm eq}<750$ K) sub-Neptunes., Comment: 19 pages, 16 figures, 9 tables. Accepted at MNRAS. CHEOPS, RV and ground-based photometric data is available on CDS at https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/523/3069

Published
2023
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363. TOI-4010: A System of Three Large Short-Period Planets With a Massive Long-Period Companion

Author

Kunimoto, Michelle, Vanderburg, Andrew, Huang, Chelsea X., Davis, M. Ryleigh, Affer, Laura, Cameron, Andrew Collier, Charbonneau, David, Cosentino, Rosario, Damasso, Mario, Dumusque, Xavier, Fiorenzano, A. F. Martnez, Ghedina, Adriano, Haywood, R. D., Lienhard, Florian, López-Morales, Mercedes, Mayor, Michel, Pepe, Francesco, Pinamonti, Matteo, Poretti, Ennio, Maldonado, Jesús, Rice, Ken, Sozzetti, Alessandro, Wilson, Thomas G., Udry, Stéphane, Baptista, Jay, Barkaoui, Khalid, Becker, Juliette, Benni, Paul, Bieryla, Allyson, Bosch-Cabot, Pau, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Evans, Elise, Dupuy, Trent J., Goliguzova, Maria V., Guerra, Pere, Kraus, Adam, Lissauer, Jack J., Huber, Daniel, Murgas, Felipe, Palle, Enric, Quinn, Samuel N., Safonov, Boris S., Schwarz, Richard P., Shporer, Avi, Stassun, Keivan G., Jenkins, Jon M., Latham, David W., Ricker, George R., Seager, Sara, Vanderspek, Roland, Winn, Joshua, Essack, Zahra, Lewis, Hannah M., Rose, Mark E., Kunimoto, Michelle, Vanderburg, Andrew, Huang, Chelsea X., Davis, M. Ryleigh, Affer, Laura, Cameron, Andrew Collier, Charbonneau, David, Cosentino, Rosario, Damasso, Mario, Dumusque, Xavier, Fiorenzano, A. F. Martnez, Ghedina, Adriano, Haywood, R. D., Lienhard, Florian, López-Morales, Mercedes, Mayor, Michel, Pepe, Francesco, Pinamonti, Matteo, Poretti, Ennio, Maldonado, Jesús, Rice, Ken, Sozzetti, Alessandro, Wilson, Thomas G., Udry, Stéphane, Baptista, Jay, Barkaoui, Khalid, Becker, Juliette, Benni, Paul, Bieryla, Allyson, Bosch-Cabot, Pau, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Evans, Elise, Dupuy, Trent J., Goliguzova, Maria V., Guerra, Pere, Kraus, Adam, Lissauer, Jack J., Huber, Daniel, Murgas, Felipe, Palle, Enric, Quinn, Samuel N., Safonov, Boris S., Schwarz, Richard P., Shporer, Avi, Stassun, Keivan G., Jenkins, Jon M., Latham, David W., Ricker, George R., Seager, Sara, Vanderspek, Roland, Winn, Joshua, Essack, Zahra, Lewis, Hannah M., and Rose, Mark E.

Abstract

We report the confirmation of three exoplanets transiting TOI-4010 (TIC-352682207), a metal-rich K dwarf observed by TESS in Sectors 24, 25, 52, and 58. We confirm these planets with HARPS-N radial velocity observations and measure their masses with 8 - 12% precision. TOI-4010 b is a sub-Neptune ($P = 1.3$ days, $R_{p} = 3.02_{-0.08}^{+0.08}~R_{\oplus}$, $M_{p} = 11.00_{-1.27}^{+1.29}~M_{\oplus}$) in the hot Neptune desert, and is one of the few such planets with known companions. Meanwhile, TOI-4010 c ($P = 5.4$ days, $R_{p} = 5.93_{-0.12}^{+0.11}~R_{\oplus}$, $M_{p} = 20.31_{-2.11}^{+2.13}~M_{\oplus}$) and TOI-4010 d ($P = 14.7$ days, $R_{p} = 6.18_{-0.14}^{+0.15}~R_{\oplus}$, $M_{p} = 38.15_{-3.22}^{+3.27}~M_{\oplus}$) are similarly-sized sub-Saturns on short-period orbits. Radial velocity observations also reveal a super-Jupiter-mass companion called TOI-4010 e in a long-period, eccentric orbit ($P \sim 762$ days and $e \sim 0.26$ based on available observations). TOI-4010 is one of the few systems with multiple short-period sub-Saturns to be discovered so far., Comment: 26 pages, 16 figures, published in AJ; (v3) added missing citation

Published
2023
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364. Two Warm Super-Earths Transiting the Nearby M Dwarf TOI-2095

Author

Quintana, Elisa V., Gilbert, Emily A., Barclay, Thomas, Silverstein, Michele L., Schlieder, Joshua E., Cloutier, Ryan, Quinn, Samuel N., Rodriguez, Joseph E., Vanderburg, Andrew, Hord, Benjamin J., Louie, Dana R., Ostberg, Colby, Kane, Stephen R., Hoffman, Kelsey, Rowe, Jason F., Arney, Giada N., Saxena, Prabal, Richardson, Taran, Clement, Matthew S., Kartvedt, Nicholas M., Adams, Fred C., Alfred, Marcus, Berger, Travis, Bieryla, Allyson, Bonney, Paul, Boyd, Patricia, Cadieux, Charles, Caldwell, Douglas, Ciardi, David R., Charbonneau, David, Collins, Karen A., Colon, Knicole D., Conti, Dennis M., Di Sora, Mario, Domagal-Goldman, Shawn, Dotson, Jessie, Fauchez, Thomas, Günther, Maximilian N., Hedges, Christina, Isopi, Giovanni, Kohler, Erika, Kopparapu, Ravi, Kostov, Veselin B., Larsen, Jeffrey A., Lopez, Eric, Mallia, Franco, Mandell, Avi, Mullally, Susan E., Paudel, Rishi R., Powell, Brian P., Ricker, George R., Safonov, Boris S., Schwarz, Richard P., Sefako, Ramotholo, Stassun, Keivan G., Wilson, Robert, Winn, Joshua N., Vanderspek, Roland K., Quintana, Elisa V., Gilbert, Emily A., Barclay, Thomas, Silverstein, Michele L., Schlieder, Joshua E., Cloutier, Ryan, Quinn, Samuel N., Rodriguez, Joseph E., Vanderburg, Andrew, Hord, Benjamin J., Louie, Dana R., Ostberg, Colby, Kane, Stephen R., Hoffman, Kelsey, Rowe, Jason F., Arney, Giada N., Saxena, Prabal, Richardson, Taran, Clement, Matthew S., Kartvedt, Nicholas M., Adams, Fred C., Alfred, Marcus, Berger, Travis, Bieryla, Allyson, Bonney, Paul, Boyd, Patricia, Cadieux, Charles, Caldwell, Douglas, Ciardi, David R., Charbonneau, David, Collins, Karen A., Colon, Knicole D., Conti, Dennis M., Di Sora, Mario, Domagal-Goldman, Shawn, Dotson, Jessie, Fauchez, Thomas, Günther, Maximilian N., Hedges, Christina, Isopi, Giovanni, Kohler, Erika, Kopparapu, Ravi, Kostov, Veselin B., Larsen, Jeffrey A., Lopez, Eric, Mallia, Franco, Mandell, Avi, Mullally, Susan E., Paudel, Rishi R., Powell, Brian P., Ricker, George R., Safonov, Boris S., Schwarz, Richard P., Sefako, Ramotholo, Stassun, Keivan G., Wilson, Robert, Winn, Joshua N., and Vanderspek, Roland K.

Abstract

We report the detection and validation of two planets orbiting TOI-2095 (TIC 235678745). The host star is a 3700K M1V dwarf with a high proper motion. The star lies at a distance of 42 pc in a sparsely populated portion of the sky and is bright in the infrared (K=9). With data from 24 Sectors of observation during TESS's Cycles 2 and 4, TOI-2095 exhibits two sets of transits associated with super-Earth-sized planets. The planets have orbital periods of 17.7 days and 28.2 days and radii of 1.30 and 1.39 Earth radii, respectively. Archival data, preliminary follow-up observations, and vetting analyses support the planetary interpretation of the detected transit signals. The pair of planets have estimated equilibrium temperatures of approximately 400 K, with stellar insolations of 3.23 and 1.73 times that of Earth, placing them in the Venus zone. The planets also lie in a radius regime signaling the transition between rock-dominated and volatile-rich compositions. They are thus prime targets for follow-up mass measurements to better understand the properties of warm, transition radius planets. The relatively long orbital periods of these two planets provide crucial data that can help shed light on the processes that shape the composition of small planets orbiting M dwarfs., Comment: Submitted to AAS Journals

Published
2023

365. Three long period transiting giant planets from TESS

Author

Brahm, Rafael, Ulmer-Moll, Solène, Hobson, Melissa J., Jordán, Andrés, Henning, Thomas, Trifonov, Trifon, Jones, Matías I., Schlecker, Martin, Espinoza, Nestor, Rojas, Felipe I., Torres, Pascal, Sarkis, Paula, Tala, Marcelo, Eberhardt, Jan, Kossakowski, Diana, Muñoz, Diego J., Hartman, Joel D., Boyle, Gavin, Suc, Vincent, Bouchy, François, Deline, Adrien, Chaverot, Guillaume, Grieves, Nolan, Lendl, Monika, Suarez, Olga, Triaud, Amaury H. M. J., Crouzet, Nicolas, Dransfield, Georgina, Guillot, Tristan, Cloutier, Ryan, Barkaoui, Khalid, Schwarz, Rick P., Stockdale, Chris, Harris, Mallory, Mireles, Ismael, Evans, Phil, Mann, Andrew W., Ziegler, Carl, Dragomir, Diana, Villanueva, Steven, Mordasini, Christoph, Ricker, George, Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Vezie, Michael, Youngblood, Allison, Daylan, Tansu, Collins, Karen A., Caldwell, Douglas A., Ciardi, David R., Palle, Enric, Murgas, Felipe, Brahm, Rafael, Ulmer-Moll, Solène, Hobson, Melissa J., Jordán, Andrés, Henning, Thomas, Trifonov, Trifon, Jones, Matías I., Schlecker, Martin, Espinoza, Nestor, Rojas, Felipe I., Torres, Pascal, Sarkis, Paula, Tala, Marcelo, Eberhardt, Jan, Kossakowski, Diana, Muñoz, Diego J., Hartman, Joel D., Boyle, Gavin, Suc, Vincent, Bouchy, François, Deline, Adrien, Chaverot, Guillaume, Grieves, Nolan, Lendl, Monika, Suarez, Olga, Triaud, Amaury H. M. J., Crouzet, Nicolas, Dransfield, Georgina, Guillot, Tristan, Cloutier, Ryan, Barkaoui, Khalid, Schwarz, Rick P., Stockdale, Chris, Harris, Mallory, Mireles, Ismael, Evans, Phil, Mann, Andrew W., Ziegler, Carl, Dragomir, Diana, Villanueva, Steven, Mordasini, Christoph, Ricker, George, Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Vezie, Michael, Youngblood, Allison, Daylan, Tansu, Collins, Karen A., Caldwell, Douglas A., Ciardi, David R., Palle, Enric, and Murgas, Felipe

Abstract

We report the discovery and orbital characterization of three new transiting warm giant planets. These systems were initially identified as presenting single transit events in the light curves generated from the full frame images of the Transiting Exoplanet Survey Satellite (TESS). Follow-up radial velocity measurements and additional light curves were used to determine the orbital periods and confirm the planetary nature of the candidates. The planets orbit slightly metal-rich late F- and early G-type stars. We find that TOI 4406b has a mass of $M_P$= 0.30 $\pm$ 0.04 $M_J$ , a radius of $R_P$= 1.00 $\pm$ 0.02 $R_J$ , and a low eccentricity orbit (e=0.15 $\pm$ 0.05) with a period of P= 30.08364 $\pm$ 0.00005 d . TOI 2338b has a mass of $M_P$= 5.98 $\pm$ 0.20 $M_J$ , a radius of $R_P$= 1.00 $\pm$ 0.01 $R_J$ , and a highly eccentric orbit (e= 0.676 $\pm$ 0.002 ) with a period of P= 22.65398 $\pm$ 0.00002 d . Finally, TOI 2589b has a mass of $M_P$= 3.50 $\pm$ 0.10 $M_J$ , a radius of $R_P$= 1.08 $\pm$ 0.03 $R_J$ , and an eccentric orbit (e = 0.522 $\pm$ 0.006 ) with a period of P= 61.6277 $\pm$ 0.0002 d . TOI 4406b and TOI 2338b are enriched in metals compared to their host stars, while the structure of TOI 2589b is consistent with having similar metal enrichment to its host star., Comment: 24 pages, 16 figures, accepted in AJ

Published
2023
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366. Discovery of a massive giant planet with extreme density around a sub-giant star TOI-4603

Author

Khandelwal, Akanksha, Sharma, Rishikesh, Chakraborty, Abhijit, Chaturvedi, Priyanka, Ulmer-Moll, Solène, Ciardi, David R., Boyle, Andrew W., Baliwal, Sanjay, Bieryla, Allyson, Latham, David W., Prasad, Neelam J. S. S. V., Nayak, Ashirbad, Lendl, Monika, Mordasini, Christoph, Khandelwal, Akanksha, Sharma, Rishikesh, Chakraborty, Abhijit, Chaturvedi, Priyanka, Ulmer-Moll, Solène, Ciardi, David R., Boyle, Andrew W., Baliwal, Sanjay, Bieryla, Allyson, Latham, David W., Prasad, Neelam J. S. S. V., Nayak, Ashirbad, Lendl, Monika, and Mordasini, Christoph

Abstract

We present the discovery of a transiting massive giant planet around TOI-4603, a sub-giant F-type star from NASA's Transiting Exoplanet Survey Satellite (TESS). The newly discovered planet has a radius of $1.042^{+0.038}_{-0.035}$ $R_{J}$, and an orbital period of $7.24599^{+0.00022}_{-0.00021}$ days. Using radial velocity measurements with the PARAS {and TRES} spectrographs, we determined the planet's mass to be $12.89^{+0.58}_{-0.57}$ $M_{J}$, resulting in a bulk density of $14.1^{+1.7}_{-1.6}$ g ${cm^{-3}}$. This makes it one of the few massive giant planets with extreme density and lies in the transition mass region of massive giant planets and low-mass brown dwarfs, an important addition to the population of less than five objects in this mass range. The eccentricity of $0.325\pm0.020$ and an orbital separation of $0.0888\pm0.0010$ AU from its host star suggest that the planet is likely undergoing high eccentricity tidal (HET) migration. We find a fraction of heavy elements of $0.13^{+0.05}_{-0.06}$ and metal enrichment of the planet ($Z_{P}/Z_{star}$) of $4.2^{+1.6}_{-2.0}$. Detection of such systems will offer us to gain valuable insights into the governing mechanisms of massive planets and improve our understanding of their dominant formation and migration mechanisms., Comment: accepted for publication in A&A Letters

Published
2023
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367. JWST Observations of the Enigmatic Y Dwarf WISE 1828+2650: I. Limits to a Binary Companion

Author

De Furio, Matthew, Lew, Ben W., Beichman, Charles A., Roellig, Thomas, Bryden, Geoffrey, Ciardi, David R., Meyer, Michael R., Rieke, Marcia J., Greenbaum, Alexandra Z., Leisenring, Jarron, Llop-Sayson, Jorge, Ygouf, Marie, Albert, Loïc, Boyer, Martha L., Eisenstein, Daniel J., Hodapp, Klaus W., Horner, Scott, Johnstone, Doug, Kelly, Douglas M., Misselt, Karl A., Rieke, George H., Stansberry, John A., Young, Erick T., De Furio, Matthew, Lew, Ben W., Beichman, Charles A., Roellig, Thomas, Bryden, Geoffrey, Ciardi, David R., Meyer, Michael R., Rieke, Marcia J., Greenbaum, Alexandra Z., Leisenring, Jarron, Llop-Sayson, Jorge, Ygouf, Marie, Albert, Loïc, Boyer, Martha L., Eisenstein, Daniel J., Hodapp, Klaus W., Horner, Scott, Johnstone, Doug, Kelly, Douglas M., Misselt, Karl A., Rieke, George H., Stansberry, John A., and Young, Erick T.

Abstract

The Y-dwarf WISE 1828+2650 is one of the coldest known Brown Dwarfs with an effective temperature of $\sim$300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of $\sim$5-10 Mj, making it a valuable laboratory for understanding the formation, evolution and physical characteristics of gas giant planets. However, previous photometry and spectroscopy have presented a puzzle with the near-impossibility of simultaneously fitting both the short (0.9-2.0 microns) and long wavelength (3-5 microns) data. A potential solution to this problem has been the suggestion that WISE 1828+2650 is a binary system whose composite spectrum might provide a better match to the data. Alternatively, new models being developed to fit JWST/NIRSpec and MIRI spectroscopy might provide new insights. This article describes JWST/NIRCam observations of WISE 1828+2650 in 6 filters to address the binarity question and to provide new photometry to be used in model fitting. We also report Adaptive Optics imaging with the Keck 10 m telescope. We find no evidence for multiplicity for a companion beyond 0.5 AU with either JWST or Keck. Companion articles will present low and high resolution spectra of WISE 1828+2650 obtained with both NIRSpec and MIRI., Comment: 15 pages, 9 figures, Accepted by ApJ on Feb. 21 2023

Published
2023
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368. TOI-2525 b and c: A pair of massive warm giant planets with a strong transit timing variations revealed by TESS

Author

Trifonov, Trifon, Brahm, Rafael, Jordan, Andres, Hartogh, Christian, Henning, Thomas, Hobson, Melissa J., Schlecker, Martin, Howard, Saburo, Reichardt, Finja, Espinoza, Nestor, Lee, Man Hoi, Nesvorny, David, Rojas, Felipe I., Barkaoui, Khalid, Kossakowski, Diana, Boyle, Gavin, Dreizler, Stefan, Kuerster, Martin, Heller, Rene, Guillot, Tristan, Triaud, Amaury H. M. J., Abe, Lyu, Agabi, Abdelkrim, Bendjoya, Philippe, Crouzet, Nicolas, Dransfield, Georgina, Gasparetto, Thomas, Guenther, Maximilian N., Marie-Sainte, Wenceslas, Mekarnia, Djamel, Suarez, Olga, Teske, Johanna, Butler, R. Paul, Crane, Jeffrey D., Shectman, Stephen, Ricker, George R., Shporer, Avi, Vanderspek, Roland, Jenkins, Jon M., Wohler, Bill, Collins, Karen A., Collins, Kevin I., Ciardi, David R., Barclay, Thomas, Mireles, Ismael, Seager, Sara, Winn, Joshua N., Trifonov, Trifon, Brahm, Rafael, Jordan, Andres, Hartogh, Christian, Henning, Thomas, Hobson, Melissa J., Schlecker, Martin, Howard, Saburo, Reichardt, Finja, Espinoza, Nestor, Lee, Man Hoi, Nesvorny, David, Rojas, Felipe I., Barkaoui, Khalid, Kossakowski, Diana, Boyle, Gavin, Dreizler, Stefan, Kuerster, Martin, Heller, Rene, Guillot, Tristan, Triaud, Amaury H. M. J., Abe, Lyu, Agabi, Abdelkrim, Bendjoya, Philippe, Crouzet, Nicolas, Dransfield, Georgina, Gasparetto, Thomas, Guenther, Maximilian N., Marie-Sainte, Wenceslas, Mekarnia, Djamel, Suarez, Olga, Teske, Johanna, Butler, R. Paul, Crane, Jeffrey D., Shectman, Stephen, Ricker, George R., Shporer, Avi, Vanderspek, Roland, Jenkins, Jon M., Wohler, Bill, Collins, Karen A., Collins, Kevin I., Ciardi, David R., Barclay, Thomas, Mireles, Ismael, Seager, Sara, and Winn, Joshua N.

Abstract

TOI-2525 is a K-type star with an estimated mass of M = 0.849$_{-0.033}^{+0.024}$ M$_\odot$ and radius of R = 0.785$_{-0.007}^{+0.007}$ R$_\odot$ observed by the TESS mission in 22 sectors (within sectors 1 and 39). The TESS light curves yield significant transit events of two companions, which show strong transit timing variations (TTVs) with a semi-amplitude of a $\sim$6 hours. We performed TTV dynamical, and photo-dynamical light curve analysis of the TESS data, combined with radial velocity (RV) measurements from FEROS and PFS, and we confirmed the planetary nature of these companions. The TOI-2525 system consists of a transiting pair of planets comparable to Neptune and Jupiter with estimated dynamical masses of $m_{\rm b}$ = 0.088$_{-0.004}^{+0.005}$ M$_{\rm Jup.}$, and $m_{\rm c}$ = 0.709$_{-0.033}^{+0.034}$ M$_{\rm Jup.}$, radius of $r_b$ = 0.88$_{-0.02}^{+0.02}$ R$_{\rm Jup.}$ and $r_c$ = 0.98$_{-0.02}^{+0.02}$ R$_{\rm Jup.}$, and with orbital periods of $P_{\rm b}$ = 23.288$_{-0.002}^{+0.001}$ days and $P_{\rm c}$ = 49.260$_{-0.001}^{+0.001}$ days for the inner and the outer planet, respectively. The period ratio is close to the 2:1 period commensurability, but the dynamical simulations of the system suggest that it is outside the mean motion resonance (MMR) dynamical configuration. TOI-2525 b is among the lowest density Neptune-mass planets known to date, with an estimated median density of $\rho_{\rm b}$ = 0.174$_{-0.015}^{+0.016}$ g\,cm$^{-3}$. The TOI-2525 system is very similar to the other K-dwarf systems discovered by TESS, TOI-2202 and TOI-216, which are composed of almost identical K-dwarf primary and two warm giant planets near the 2:1 MMR., Comment: Accepted for publication in AJ

Published
2023
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369. Spinning up a Daze: TESS Uncovers a Hot Jupiter orbiting the Rapid-Rotator TOI-778

Author

Clark, Jake T., Addison, Brett C., Okumura, Jack, Vach, Sydney, Heitzmann, Alexis, Rodriguez, Joseph E., Wright, Duncan J., Clerte, Mathieu, Brown, Carolyn J., Feterholf, Tara, Wittenmyer, Robert A., Plavchan, Peter, Kane, Stephen R., Horner, Jonathan, Kielkoff, John F., Shporer, Avi, Tinney, C. G., Hui-Gen, Liu, Ballard, Sarah, Bowler, Brendan P., Mengel, Matthew W., Zhou, George, Lee, Annette S., David, Avelyn, Heim, Jessica, Lee, Michele E., Sevilla, Veronica, Zafar, Naqsh E., Hinkel, Natalie R., Allen, Bridgette E., Bayliss, Daniel, Berberyan, Arthur, Berlind, Perry, Bieryla, Allyson, Bouchy, Francois, Brahm, Rafael, Bryant, Edward M., Christiansen, Jessie L., Ciardi, David R., Ciardi, Krys N., Collins, Karen A., Dallant, Jules, Davis, Allen B., Diaz, Matias R., Dressing, Courtney D., Esquerdo, Gilbert A., Harre, Jan-Vincent, Howell, Steve B., Jenkins, Jon M., Jensen, Eric L. N., Jones, Matias I., Jordan, Andres, Latham, David W., Lund, Michael B., McCormac, James, Nielsen, Louise D., Otegi, Jon, Quinn, Samuel N., Radford, Don J., Ricker, George R., Schwarz, Richard P., Seager, Sara, Smith, Alexis M. S., Stockdale, Chris, Tan, Thiam-Guan, Udry, Stephanie, Vanderspek, Roland, Gunther, Maximilian N., Wang, Songhu, Wingham, Geof, Winn, Joshua N., Clark, Jake T., Addison, Brett C., Okumura, Jack, Vach, Sydney, Heitzmann, Alexis, Rodriguez, Joseph E., Wright, Duncan J., Clerte, Mathieu, Brown, Carolyn J., Feterholf, Tara, Wittenmyer, Robert A., Plavchan, Peter, Kane, Stephen R., Horner, Jonathan, Kielkoff, John F., Shporer, Avi, Tinney, C. G., Hui-Gen, Liu, Ballard, Sarah, Bowler, Brendan P., Mengel, Matthew W., Zhou, George, Lee, Annette S., David, Avelyn, Heim, Jessica, Lee, Michele E., Sevilla, Veronica, Zafar, Naqsh E., Hinkel, Natalie R., Allen, Bridgette E., Bayliss, Daniel, Berberyan, Arthur, Berlind, Perry, Bieryla, Allyson, Bouchy, Francois, Brahm, Rafael, Bryant, Edward M., Christiansen, Jessie L., Ciardi, David R., Ciardi, Krys N., Collins, Karen A., Dallant, Jules, Davis, Allen B., Diaz, Matias R., Dressing, Courtney D., Esquerdo, Gilbert A., Harre, Jan-Vincent, Howell, Steve B., Jenkins, Jon M., Jensen, Eric L. N., Jones, Matias I., Jordan, Andres, Latham, David W., Lund, Michael B., McCormac, James, Nielsen, Louise D., Otegi, Jon, Quinn, Samuel N., Radford, Don J., Ricker, George R., Schwarz, Richard P., Seager, Sara, Smith, Alexis M. S., Stockdale, Chris, Tan, Thiam-Guan, Udry, Stephanie, Vanderspek, Roland, Gunther, Maximilian N., Wang, Songhu, Wingham, Geof, and Winn, Joshua N.

Abstract

NASA's Transiting Exoplanet Survey Satellite (TESS) mission, has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination of these worlds. We present the discovery of a hot Jupiter orbiting a rapidly rotating (vsin(i)=35.1±1.0km/s) early F3V-dwarf, HD115447 (TOI-778). The transit signal taken from Sectors 10 and 37 of TESS's initial detection of the exoplanet is combined with follow-up ground-based photometry and velocity measurements taken from Minerva-Australis, TRES, CORALIE and CHIRON to confirm and characterise TOI-778b. A joint analysis of the light curves and the radial velocity measurements yield a mass, radius, and orbital period for TOI-778b of 2.76+0.24−0.23Mjup, 1.370±0.043Rjup and ∼4.63 days, respectively. The planet orbits a bright (V=9.1mag) F3-dwarf with M=1.40±0.05Msun, R=1.70±0.05Rsun, and logg=4.05±0.17. We observed a spectroscopic transit of TOI-778b, which allowed us to derive a sky-projected spin-orbit angle of 18∘±11∘, consistent with an aligned planetary system. This discovery demonstrates the capability of smaller aperture telescopes such as Minerva-Australis to detect the radial velocity signals produced by planets orbiting broad-line, rapidly rotating stars.

Published
2023

370. TOI-332 b: a super dense Neptune found deep within the Neptunian desert

Author

Osborn, Ares; https://orcid.org/0000-0002-5899-7750, Armstrong, David J; https://orcid.org/0000-0002-5080-4117, Fernández Fernández, Jorge, Knierim, Henrik, Adibekyan, Vardan, Collins, Karen A, Delgado-Mena, Elisa, Fridlund, Malcolm; https://orcid.org/0000-0002-0855-8426, Gomes da Silva, João, Hellier, Coel, Jackson, David G; https://orcid.org/0000-0003-0343-7905, King, George W; https://orcid.org/0000-0002-3641-6636, Lillo-Box, Jorge, Matson, Rachel A; https://orcid.org/0000-0001-7233-7508, Matthews, Elisabeth C, Santos, Nuno C, Sousa, Sérgio G; https://orcid.org/0000-0001-9047-2965, Stassun, Keivan G; https://orcid.org/0000-0002-3481-9052, Tan, Thiam-Guan, Ricker, George R, Vanderspek, Roland, Latham, David W, Seager, Sara, Winn, Joshua N, Jenkins, Jon M, Bayliss, Daniel; https://orcid.org/0000-0001-6023-1335, Bouma, Luke G; https://orcid.org/0000-0002-0514-5538, Ciardi, David R, Collins, Kevin I, Colón, Knicole D, et al, Osborn, Ares; https://orcid.org/0000-0002-5899-7750, Armstrong, David J; https://orcid.org/0000-0002-5080-4117, Fernández Fernández, Jorge, Knierim, Henrik, Adibekyan, Vardan, Collins, Karen A, Delgado-Mena, Elisa, Fridlund, Malcolm; https://orcid.org/0000-0002-0855-8426, Gomes da Silva, João, Hellier, Coel, Jackson, David G; https://orcid.org/0000-0003-0343-7905, King, George W; https://orcid.org/0000-0002-3641-6636, Lillo-Box, Jorge, Matson, Rachel A; https://orcid.org/0000-0001-7233-7508, Matthews, Elisabeth C, Santos, Nuno C, Sousa, Sérgio G; https://orcid.org/0000-0001-9047-2965, Stassun, Keivan G; https://orcid.org/0000-0002-3481-9052, Tan, Thiam-Guan, Ricker, George R, Vanderspek, Roland, Latham, David W, Seager, Sara, Winn, Joshua N, Jenkins, Jon M, Bayliss, Daniel; https://orcid.org/0000-0001-6023-1335, Bouma, Luke G; https://orcid.org/0000-0002-0514-5538, Ciardi, David R, Collins, Kevin I, Colón, Knicole D, and et al

Abstract

To date, thousands of planets have been discovered, but there are regions of the orbital parameter space that are still bare. An example is the short period and intermediate mass/radius space known as the ‘Neptunian desert’, where planets should be easy to find but discoveries remain few. This suggests unusual formation and evolution processes are responsible for the planets residing here. We present the discovery of TOI-332 b, a planet with an ultra-short period of 0.78 d that sits firmly within the desert. It orbits a K0 dwarf with an effective temperature of 5251 ± 71 K. TOI-332 b has a radius of $3.20^{+0.16}_{-0.12}$ R⊕, smaller than that of Neptune, but an unusually large mass of 57.2 ± 1.6 M⊕. It has one of the highest densities of any Neptune-sized planet discovered thus far at $9.6^{+1.1}_{-1.3}$ g cm−3. A 4-layer internal structure model indicates it likely has a negligible hydrogen-helium envelope, something only found for a small handful of planets this massive, and so TOI-332 b presents an interesting challenge to planetary formation theories. We find that photoevaporation cannot account for the mass-loss required to strip this planet of the Jupiter-like envelope it would have been expected to accrete. We need to look towards other scenarios, such as high-eccentricity migration, giant impacts, or gap opening in the protoplanetary disc, to try and explain this unusual discovery.

Published
2023

371. High-Resolution Imaging of a TESS Control Sample: Verifying a Deficit of Close-In Stellar Companions to Exoplanet Host Stars

Author

Littlefield, Colin, Howell, Steve B., Ciardi, David R., Lester, Kathryn V., Everett, Mark E., Furlan, Elise, Matson, Rachel A., Fajardo-Acosta, Sergio B., Gnilka, Crystal L., Littlefield, Colin, Howell, Steve B., Ciardi, David R., Lester, Kathryn V., Everett, Mark E., Furlan, Elise, Matson, Rachel A., Fajardo-Acosta, Sergio B., and Gnilka, Crystal L.

Abstract

The large number of exoplanets discovered with the Transiting Exoplanet Survey Satellite (TESS) means that any observational biases from TESS could influence the derived stellar multiplicity statistics of exoplanet host stars. To investigate this problem, we obtained speckle interferometry of 207 control stars whose properties in the TESS Input Catalog (TIC) closely match those of an exoplanetary host star in the TESS Object of Interest (TOI) catalog, with the objective of measuring the fraction of these stars that have companions within $\sim1.2"$. Our main result is the identification of a bias in the creation of the control sample that prevents the selection of binaries with $0.1" \lesssim \rho \lesssim 1.2"$ and $\Delta$mag $\lesssim3$. This bias is the result of large astrometric residuals that cause binaries with these parameters to fail the quality checks used to create the TIC, which in turn causes them to have incomplete stellar parameters (and uncertainties) in the TIC. Any stellar multiplicity study that relies exclusively upon TIC stellar parameters to identify its targets will struggle to select unresolved binaries in this parameter space. Left uncorrected, this selection bias disproportionately excludes high-mass-ratio binaries, causing the mass-ratio distribution of the companions to deviate significantly from the uniform distribution expected of FGK-type field binaries. After accounting for this bias, the companion rate of the FGK control stars is consistent with the canonical $46\pm2\%$ rate from Raghavan et al. 2010, and the mass-ratio distribution agrees with that of binary TOI host stars. There is marginal evidence that the control-star companions have smaller projected orbital separations than TOI host stars from previous studies., Comment: AJ accepted for publication

Published
2023

372. The POKEMON Speckle Survey of Nearby M Dwarfs. II. Observations of 1125 Targets

Author

Clark, Catherine A., van Belle, Gerard T., Horch, Elliott P., Lund, Michael B., Ciardi, David R., von Braun, Kaspar, Winters, Jennifer G., Everett, Mark E., Hartman, Zachary D., Llama, Joe, Clark, Catherine A., van Belle, Gerard T., Horch, Elliott P., Lund, Michael B., Ciardi, David R., von Braun, Kaspar, Winters, Jennifer G., Everett, Mark E., Hartman, Zachary D., and Llama, Joe

Abstract

Stellar multiplicity is correlated with many stellar properties, yet multiplicity measurements have proven difficult for the M dwarfs -- the most common type of star in our galaxy -- due to their faintness and the fact that a reasonably-complete inventory of later M dwarfs did not exist until recently. We have therefore carried out the Pervasive Overview of "Kompanions" of Every M dwarf in Our Neighborhood (POKEMON) survey, which made use of the Differential Speckle Survey Instrument on the 4.3-meter Lowell Discovery Telescope, along with the NN-EXPLORE Exoplanet Stellar Speckle Imager on the 3.5-meter WIYN telescope. The POKEMON sample is volume-limited from M0V through M9V out to 15 pc, with additional brighter targets at larger distances. In total, 1125 targets were observed. New discoveries were presented in the first paper in the series. In this second paper in the series, we present all detected companions, gauge our astrometric and photometric precision, and compare our filtered and filterless speckle observations. We find that the majority (58.9%) of the companions we detect in our speckle images are not resolved in Gaia, demonstrating the need for high-resolution imaging in addition to long-term astrometric monitoring. Additionally, we find that the majority (73.2%) of simulated stellar companions would be detectable by our speckle observations. Specifically within 100 au, we find that 70.3% of simulated companions are recovered. Finally, we discuss future directions of the POKEMON survey., Comment: 24 pages, 11 figures. Accepted for publication in the Astronomical Journal

Published
2023

373. TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS.

Author

Fairnington, Tyler R, Nabbie, Emma, Huang, Chelsea X, Zhou, George, Foo, Orion, Millholland, Sarah, Wright, Duncan, Belinski, Alexandre A, Bieryla, Allyson, Ciardi, David R, Collins, Karen A, Collins, Kevin I, Everett, Mark, Howell, Steve B, Lissauer, Jack J, Lund, Michael B, Murgas, Felipe, Palle, Enric, Quinn, Samuel N, and Relles, Howard M

Subjects
NEPTUNE (Planet), NATURAL satellites, ORBITS (Astronomy), PLANETS, EXTRASOLAR planets
Abstract

We present the confirmation of a hot super-Neptune with an exterior Neptune companion orbiting a bright (V  = 10.1 mag) F-dwarf identified by the Transiting Exoplanet Survey Satellite (TESS). The two planets, observed in sectors 45, 46, and 48 of the TESS extended mission, are |$4.74_{-0.14}^{+0.16}$| and |$3.86_{-0.16}^{+0.17}$| R⊕ with |$5.4588385_{-0.0000072}^{+0.0000070}$| and |$17.8999_{-0.0013}^{+0.0018}$| d orbital periods, respectively. We also obtained precise space-based photometric follow-up of the system with ESA's CHaracterising ExOplanets Satellite to constrain the radius and ephemeris of TOI-5126 b. TOI-5126 b is located in the 'hot Neptune Desert' and is an ideal candidate for follow-up transmission spectroscopy due to its high-predicted equilibrium temperature (T eq =  |${1442}_{-40}^{+46}$| K) implying a cloud-free atmosphere. TOI-5126 c is a warm Neptune (T eq =  |$971_{-27}^{+31}$| K) also suitable for follow-up. Tentative transit timing variations have also been identified in analysis, suggesting the presence of at least one additional planet, however this signal may be caused by spot-crossing events, necessitating further precise photometric follow-up to confirm these signals. [ABSTRACT FROM AUTHOR]

Published
2024
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374. TOI-908: a planet at the edge of the Neptune desert transiting a G-type star

Author

Hawthorn, Faith, primary, Bayliss, Daniel, additional, Armstrong, David J, additional, Fernández Fernández, Jorge, additional, Osborn, Ares, additional, Sousa, Sérgio G, additional, Adibekyan, Vardan, additional, Davoult, Jeanne, additional, Collins, Karen A, additional, Alibert, Yann, additional, Barros, Susana C C, additional, Bouchy, François, additional, Brogi, Matteo, additional, Ciardi, David R, additional, Daylan, Tansu, additional, Delgado Mena, Elisa, additional, Demangeon, Olivier D S, additional, Díaz, Rodrigo F, additional, Gan, Tianjun, additional, Horne, Keith, additional, Hoyer, Sergio, additional, Jenkins, Jon M, additional, Jensen, Eric L N, additional, Kielkopf, John F, additional, Kostov, Veselin, additional, Latham, David W, additional, Levine, Alan M, additional, Lillo-Box, Jorge, additional, Nielsen, Louise D, additional, Osborn, Hugh P, additional, Ricker, George R, additional, Rodrigues, José, additional, Santos, Nuno C, additional, Schwarz, Richard P, additional, Seager, Sara, additional, Serrano Bell, Juan, additional, Shporer, Avi, additional, Stockdale, Chris, additional, Strøm, Paul A, additional, Tenenbaum, Peter, additional, Udry, Stéphane, additional, Wheatley, Peter J, additional, Winn, Joshua N, additional, and Ziegler, Carl, additional

Published
2023
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375. Three Long-period Transiting Giant Planets from TESS*

Author

Brahm, Rafael, primary, Ulmer-Moll, Solène, additional, Hobson, Melissa J., additional, Jordán, Andrés, additional, Henning, Thomas, additional, Trifonov, Trifon, additional, Jones, Matías I., additional, Schlecker, Martin, additional, Espinoza, Nestor, additional, Rojas, Felipe I., additional, Torres, Pascal, additional, Sarkis, Paula, additional, Tala, Marcelo, additional, Eberhardt, Jan, additional, Kossakowski, Diana, additional, Muñoz, Diego J., additional, Hartman, Joel D., additional, Boyle, Gavin, additional, Suc, Vincent, additional, Bouchy, François, additional, Deline, Adrien, additional, Chaverot, Guillaume, additional, Grieves, Nolan, additional, Lendl, Monika, additional, Suarez, Olga, additional, Guillot, Tristan, additional, Triaud, Amaury H. M. J., additional, Crouzet, Nicolas, additional, Dransfield, Georgina, additional, Cloutier, Ryan, additional, Barkaoui, Khalid, additional, Schwarz, Rick P., additional, Stockdale, Chris, additional, Harris, Mallory, additional, Mireles, Ismael, additional, Evans, Phil, additional, Mann, Andrew W., additional, Ziegler, Carl, additional, Dragomir, Diana, additional, Villanueva, Steven, additional, Mordasini, Christoph, additional, Ricker, George, additional, Vanderspek, Roland, additional, Latham, David W., additional, Seager, Sara, additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, Vezie, Michael, additional, Youngblood, Allison, additional, Daylan, Tansu, additional, Collins, Karen A., additional, Caldwell, Douglas A., additional, Ciardi, David R., additional, Palle, Enric, additional, and Murgas, Felipe, additional

Published
2023
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376. Spinning up a Daze: TESS Uncovers a Hot Jupiter Orbiting the Rapid Rotator TOI-778

Author

Clark, Jake T., primary, Addison, Brett C., additional, Okumura, Jack, additional, Vach, Sydney, additional, Errico, Adriana, additional, Heitzmann, Alexis, additional, Rodriguez, Joseph E., additional, Wright, Duncan J., additional, Clerté, Mathieu, additional, Brown, Carolyn J., additional, Fetherolf, Tara, additional, Wittenmyer, Robert A., additional, Plavchan, Peter, additional, Kane, Stephen R., additional, Horner, Jonathan, additional, Kielkopf, John F., additional, Shporer, Avi, additional, Tinney, C. G., additional, Hui-Gen, Liu, additional, Ballard, Sarah, additional, Bowler, Brendan P., additional, Mengel, Matthew W., additional, Zhou, George, additional, Lee, Annette S., additional, David, Avelyn, additional, Heim, Jessica, additional, Lee, Michele E., additional, Sevilla, Verónica, additional, Zafar, Naqsh E., additional, Hinkel, Natalie R., additional, Allen, Bridgette E., additional, Bayliss, Daniel, additional, Berberyan, Arthur, additional, Berlind, Perry, additional, Bieryla, Allyson, additional, Bouchy, François, additional, Brahm, Rafael, additional, Bryant, Edward M., additional, Christiansen, Jessie L., additional, Ciardi, David R., additional, Ciardi, Krys N., additional, Collins, Karen A., additional, Dallant, Jules, additional, Davis, Allen B., additional, Díaz, Matías R., additional, Dressing, Courtney D., additional, Esquerdo, Gilbert A., additional, Harre, Jan-Vincent, additional, Howell, Steve B., additional, Jenkins, Jon M., additional, Jensen, Eric L. N., additional, Jones, Matías I., additional, Jordán, Andrés, additional, Latham, David W., additional, Lund, Michael B., additional, McCormac, James, additional, Nielsen, Louise D., additional, Otegi, Jon, additional, Quinn, Samuel N., additional, Radford, Don J., additional, Ricker, George R., additional, Schwarz, Richard P., additional, Seager, Sara, additional, Smith, Alexis M. S., additional, Stockdale, Chris, additional, Tan, Thiam-Guan, additional, Udry, Stéphane, additional, Vanderspek, Roland, additional, Günther, Maximilian N., additional, Wang, Songhu, additional, Wingham, Geof, additional, and Winn, Joshua N., additional

Published
2023
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377. Discovery of a massive giant planet with extreme density around the sub-giant star TOI-4603

Author

Khandelwal, Akanksha, primary, Sharma, Rishikesh, additional, Chakraborty, Abhijit, additional, Chaturvedi, Priyanka, additional, Ulmer-Moll, Solène, additional, Ciardi, David R., additional, Boyle, Andrew W., additional, Baliwal, Sanjay, additional, Bieryla, Allyson, additional, Latham, David W., additional, Prasad, Neelam J. S. S. V., additional, Nayak, Ashirbad, additional, Lendl, Monika, additional, and Mordasini, Christoph, additional

Published
2023
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378. Author Correction: An ultrahot Neptune in the Neptune desert

Author

Jenkins, James S., Díaz, Matías R., Kurtovic, Nicolás T., Espinoza, Néstor, Vines, Jose I., Rojas, Pablo A. Peña, Brahm, Rafael, Torres, Pascal, Cortés-Zuleta, Pía, Soto, Maritza G., Lopez, Eric D., King, George W., Wheatley, Peter J., Winn, Joshua N., Ciardi, David R., Ricker, George, Vanderspek, Roland, Latham, David W., Seager, Sara, Jenkins, Jon M., Beichman, Charles A., Bieryla, Allyson, Burke, Christopher J., Christiansen, Jessie L., Henze, Christopher E., Klaus, Todd C., McCauliff, Sean, Mori, Mayuko, Narita, Norio, Nishiumi, Taku, Tamura, Motohide, de Leon, Jerome Pitogo, Quinn, Samuel N., Villaseñor, Jesus Noel, Vezie, Michael, Lissauer, Jack J., Collins, Karen A., Collins, Kevin I., Isopi, Giovanni, Mallia, Franco, Ercolino, Andrea, Petrovich, Cristobal, Jordán, Andrés, Acton, Jack S., Armstrong, David J., Bayliss, Daniel, Bouchy, François, Belardi, Claudia, Bryant, Edward M., Burleigh, Matthew R., Cabrera, Juan, Casewell, Sarah L., Chaushev, Alexander, Cooke, Benjamin F., Eigmüller, Philipp, Erikson, Anders, Foxell, Emma, Gänsicke, Boris T., Gill, Samuel, Gillen, Edward, Günther, Maximilian N., Goad, Michael R., Hooton, Matthew J., Jackman, James A. G., Louden, Tom, McCormac, James, Moyano, Maximiliano, Nielsen, Louise D., Pollacco, Don, Queloz, Didier, Rauer, Heike, Raynard, Liam, Smith, Alexis M. S., Tilbrook, Rosanna H., Titz-Weider, Ruth, Turner, Oliver, Udry, Stéphane, Walker, Simon. R., Watson, Christopher A., West, Richard G., Palle, Enric, Ziegler, Carl, Law, Nicholas, and Mann, Andrew W.

Published
2020
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379. TOI-2525 b and c: A Pair of Massive Warm Giant Planets with Strong Transit Timing Variations Revealed by TESS*

Author

Trifonov, Trifon, primary, Brahm, Rafael, additional, Jordán, Andrés, additional, Hartogh, Christian, additional, Henning, Thomas, additional, Hobson, Melissa J., additional, Schlecker, Martin, additional, Howard, Saburo, additional, Reichardt, Finja, additional, Espinoza, Nestor, additional, Lee, Man Hoi, additional, Nesvorny, David, additional, Rojas, Felipe I., additional, Barkaoui, Khalid, additional, Kossakowski, Diana, additional, Boyle, Gavin, additional, Dreizler, Stefan, additional, Kürster, Martin, additional, Heller, René, additional, Guillot, Tristan, additional, Triaud, Amaury H. M. J., additional, Abe, Lyu, additional, Agabi, Abdelkrim, additional, Bendjoya, Philippe, additional, Crouzet, Nicolas, additional, Dransfield, Georgina, additional, Gasparetto, Thomas, additional, Günther, Maximilian N., additional, Marie-Sainte, Wenceslas, additional, Mékarnia, Djamel, additional, Suarez, Olga, additional, Teske, Johanna, additional, Butler, R. Paul, additional, Crane, Jeffrey D., additional, Shectman, Stephen, additional, Ricker, George R., additional, Shporer, Avi, additional, Vanderspek, Roland, additional, Jenkins, Jon M., additional, Wohler, Bill, additional, Collins, Karen A., additional, Collins, Kevin I., additional, Ciardi, David R., additional, Barclay, Thomas, additional, Mireles, Ismael, additional, Seager, Sara, additional, and Winn, Joshua N., additional

Published
2023
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380. TOI-1695 b: A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley

Author

Cherubim, Collin, primary, Cloutier, Ryan, additional, Charbonneau, David, additional, Stockdale, Chris, additional, Stassun, Keivan G., additional, Schwarz, Richard P., additional, Safonov, Boris, additional, Mortier, Annelies, additional, Lewin, Pablo, additional, Latham, David W., additional, Horne, Keith, additional, Haywood, Raphaëlle D., additional, Gonzales, Erica, additional, Goliguzova, Maria V., additional, Collins, Karen A., additional, Ciardi, David R., additional, Bieryla, Allyson, additional, Belinski, Alexandre A., additional, Wohler, Bill, additional, Watson, Christopher A., additional, Vanderspek, Roland, additional, Udry, Stéphane, additional, Sozzetti, Alessandro, additional, Ségransan, Damien, additional, Sasselov, Dimitar, additional, Ricker, George R., additional, Rice, Ken, additional, Poretti, Ennio, additional, Piotto, Giampaolo, additional, Pepe, Francesco, additional, Molinari, Emilio, additional, Micela, Giuseppina, additional, Mayor, Michel, additional, Lovis, Christophe, additional, López-Morales, Mercedes, additional, Jenkins, Jon M., additional, Essack, Zahra, additional, Dumusque, Xavier, additional, Doty, John P., additional, Colón, Knicole D., additional, Cameron, Andrew Collier, additional, and Buchhave, Lars A., additional

Published
2023
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381. Upgraded Thoth: Software for Data Visualization and Statistics

Author

Laher, Russ R., primary, Masci, Frank J., additional, Rebull, Luisa M., additional, Schurr, Steven D., additional, Burt, Wendy, additional, Laity, Anastasia, additional, Swain, Melanie, additional, Shupe, David L., additional, Groom, Steve, additional, Rusholme, Benjamin, additional, Kong, Mih-Seh, additional, Good, John C., additional, Gorjian, Varoujan, additional, Akeson, Rachel, additional, Fulton, Benjamin J., additional, Ciardi, David R., additional, and Carey, Sean, additional

Published
2023
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382. Erratum: “TESS Hunt for Young and Maturing Exoplanets (THYME). VII. Membership, Rotation, and Lithium in the Young Cluster Group-X and a New Young Exoplanet” (2022, AJ, 164, 119)

Author

Newton, Elisabeth R., primary, Rampalli, Rayna, additional, Kraus, Adam L., additional, Mann, Andrew W., additional, Curtis, Jason L., additional, Vanderburg, Andrew, additional, Krolikowski, Daniel M., additional, Huber, Daniel, additional, Petter, Grayson C., additional, Bieryla, Allyson, additional, Tofflemire, Benjamin M., additional, Thao, Pa Chia, additional, Wood, Mackenna L., additional, Kerr, Ronan, additional, Safanov, Boris S., additional, Strakhov, Ivan A., additional, Ciardi, David R., additional, Giacalone, Steven, additional, Dressing, Courtney D., additional, Gill, Holden, additional, Savel, Arjun B., additional, Collins, Karen A., additional, Brown, Peyton, additional, Murgas, Felipe, additional, Isogai, Keisuke, additional, Narita, Norio, additional, Palle, Enric, additional, Quinn, Samuel N., additional, Eastman, Jason D., additional, Fűrész, Gábor, additional, Shiao, Bernie, additional, Daylan, Tansu, additional, Caldwell, Douglas A., additional, Ricker, George R., additional, Vanderspek, Roland, additional, Seager, Sara, additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, and Latham, David W., additional

Published
2023
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383. Another shipment of six short-period giant planets from TESS

Author

Rodriguez, Joseph E, primary, Quinn, Samuel N, additional, Vanderburg, Andrew, additional, Zhou, George, additional, Eastman, Jason D, additional, Thygesen, Erica, additional, Cale, Bryson, additional, Ciardi, David R, additional, Reed, Phillip A, additional, Oelkers, Ryan J, additional, Collins, Karen A, additional, Bieryla, Allyson, additional, Latham, David W, additional, Gonzales, Erica J, additional, Scott Gaudi, B, additional, Hellier, Coel, additional, Jones, Matías I, additional, Brahm, Rafael, additional, Sokolovsky, Kirill, additional, Schulte, Jack, additional, Srdoc, Gregor, additional, Kielkopf, John, additional, Grau Horta, Ferran, additional, Massey, Bob, additional, Evans, Phil, additional, Stephens, Denise C, additional, McLeod, Kim K, additional, Chazov, Nikita, additional, Krushinsky, Vadim, additional, Ghachoui, Mourad, additional, Safonov, Boris S, additional, Dedrick, Cayla M, additional, Conti, Dennis, additional, Laloum, Didier, additional, Giacalone, Steven, additional, Ziegler, Carl, additional, Guerra Serra, Pere, additional, Naves Nogues, Ramon, additional, Murgas, Felipe, additional, Michaels, Edward J, additional, Ricker, George R, additional, Vanderspek, Roland K, additional, Seager, Sara, additional, Winn, Joshua N, additional, Jenkins, Jon M, additional, Addison, Brett, additional, Alfaro, Owen, additional, Anderson, D R, additional, Aydi, Elias, additional, Beatty, Thomas G, additional, Bedding, Timothy R, additional, Belinski, Alexander A, additional, Benkhaldoun, Zouhair, additional, Berlind, Perry, additional, Blake, Cullen H, additional, Bowen, Michael J, additional, Bowler, Brendan P, additional, Boyle, Andrew W, additional, Branson, Dalton, additional, Briceño, César, additional, Calkins, Michael L, additional, Campbell, Emma, additional, Christiansen, Jessie L, additional, Chomiuk, Laura, additional, Collins, Kevin I, additional, Cornachione, Matthew A, additional, Daassou, Ahmed, additional, Dressing, Courtney D, additional, Esquerdo, Gilbert A, additional, Feliz, Dax L, additional, Fong, William, additional, Fukui, Akihiko, additional, Gan, Tianjun, additional, Gill, Holden, additional, Goliguzova, Maria V, additional, Hansen, Jarrod, additional, Henning, Thomas, additional, Hintz, Eric G, additional, Hobson, Melissa J, additional, Horner, Jonathan, additional, Huang, Chelsea X, additional, James, David J, additional, Jensen, Jacob S, additional, Johnson, Samson A, additional, Jordán, Andrés, additional, Kane, Stephen R, additional, Barkaoui, Khalid, additional, Kim, Myung-Jin, additional, Kim, Kingsley, additional, Kuhn, Rudolf B, additional, Law, Nicholas, additional, Lewin, Pablo, additional, Liu, Hui-Gen, additional, Lund, Michael B, additional, Mann, Andrew W, additional, McCrady, Nate, additional, Mengel, Matthew W, additional, Mink, Jessica, additional, Murphy, Lauren G, additional, Narita, Norio, additional, Newman, Patrick, additional, Okumura, Jack, additional, Osborn, Hugh P, additional, Paegert, Martin, additional, Palle, Enric, additional, Pepper, Joshua, additional, Plavchan, Peter, additional, Popov, Alexander A, additional, Rabus, Markus, additional, Ranshaw, Jessica, additional, Rodriguez, Jennifer A, additional, Roh, Dong-Goo, additional, Reefe, Michael A, additional, Savel, Arjun B, additional, Schwarz, Richard P, additional, Shporer, Avi, additional, Siverd, Robert J, additional, Sliski, David H, additional, Stassun, Keivan G, additional, Stevens, Daniel J, additional, Soubkiou, Abderahmane, additional, Ting, Eric B, additional, Tinney, C G, additional, Vowell, Noah, additional, Walton, Payton, additional, West, R G, additional, Wilson, Maurice L, additional, Wittenmyer, Robert A, additional, Wittrock, Justin M, additional, Wolf, Shania, additional, Wright, Jason T, additional, Zhang, Hui, additional, and Zobel, Evan, additional

Published
2023
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384. Characterization of a Set of Small Planets with TESS and CHEOPS and an Analysis of Photometric Performance

Author

Oddo, Dominic, primary, Dragomir, Diana, additional, Brandeker, Alexis, additional, Osborn, Hugh P., additional, Collins, Karen, additional, Stassun, Keivan G., additional, Astudillo-Defru, Nicola, additional, Bieryla, Allyson, additional, Howell, Steve B., additional, Ciardi, David R., additional, Quinn, Samuel, additional, Almenara, Jose M., additional, Briceño, César, additional, Collins, Kevin I., additional, Colón, Knicole D., additional, Conti, Dennis M., additional, Crouzet, Nicolas, additional, Furlan, Elise, additional, Gan, Tianjun, additional, Gnilka, Crystal L., additional, Goeke, Robert F., additional, Gonzales, Erica, additional, Harris, Mallory, additional, Jenkins, Jon M., additional, Jensen, Eric L. N., additional, Latham, David, additional, Law, Nicholas, additional, Lund, Michael B., additional, Mann, Andrew W., additional, Massey, Bob, additional, Murgas, Felipe, additional, Ricker, George, additional, Relles, Howard M., additional, Rowden, Pamela, additional, Schwarz, Richard P., additional, Schlieder, Joshua, additional, Shporer, Avi, additional, Seager, Sara, additional, Srdoc, Gregor, additional, Torres, Guillermo, additional, Twicken, Joseph D., additional, Vanderspek, Roland, additional, Winn, Joshua N., additional, and Ziegler, Carl, additional

Published
2023
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385. TOI-4562b: A Highly Eccentric Temperate Jupiter Analog Orbiting a Young Field Star

Author

Heitzmann, Alexis, primary, Zhou, George, additional, Quinn, Samuel N., additional, Huang, Chelsea X., additional, Dong, Jiayin, additional, Bouma, L. G., additional, Dawson, Rebekah I., additional, Marsden, Stephen C., additional, Wright, Duncan, additional, Petit, Pascal, additional, Collins, Karen A., additional, Barkaoui, Khalid, additional, Wittenmyer, Robert A., additional, Gillen, Edward, additional, Brahm, Rafael, additional, Hobson, Melissa, additional, Hellier, Coel, additional, Ziegler, Carl, additional, Briceño, César, additional, Law, Nicholas, additional, Mann, Andrew W., additional, Howell, Steve B., additional, Gnilka, Crystal L., additional, Littlefield, Colin, additional, Latham, David W., additional, Lissauer, Jack J., additional, Newton, Elisabeth R., additional, Krolikowski, Daniel M., additional, Kerr, Ronan, additional, Rampalli, Rayna, additional, Douglas, Stephanie T., additional, Eisner, Nora L., additional, Guedj, Nathalie, additional, Sun, Guoyou, additional, Smit, Martin, additional, Huten, Marc, additional, Eschweiler, Thorsten, additional, Abe, Lyu, additional, Guillot, Tristan, additional, Ricker, George, additional, Vanderspek, Roland, additional, Seager, Sara, additional, Jenkins, Jon M., additional, Ting, Eric B., additional, Winn, Joshua N., additional, Ciardi, David R., additional, Vanderburg, Andrew M., additional, Burke, Christopher J., additional, Rodriguez, David R., additional, and Daylan, Tansu, additional

Published
2023
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386. VaTEST I: validation of sub-Saturn exoplanet TOI-181b in narrow orbit from its host star

Author

Mistry, Priyashkumar, primary, Pathak, Kamlesh, additional, Lekkas, Georgios, additional, Prasad, Aniket, additional, Bhattarai, Surendra, additional, Maity, Mousam, additional, Beichman, Charles A, additional, Ciardi, David R, additional, Evans, Phil, additional, Bieryla, Allyson, additional, Eastman, Jason D, additional, Esquerdo, Gilbert A, additional, and Lucero, Jennifer P, additional

Published
2023
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387. The TESS Grand Unified Hot Jupiter Survey. II. Twenty New Giant Planets*

Author

Yee, Samuel W., primary, Winn, Joshua N., additional, Hartman, Joel D., additional, Bouma, Luke G., additional, Zhou, George, additional, Quinn, Samuel N., additional, Latham, David W., additional, Bieryla, Allyson, additional, Rodriguez, Joseph E., additional, Collins, Karen A., additional, Alfaro, Owen, additional, Barkaoui, Khalid, additional, Beard, Corey, additional, Belinski, Alexander A., additional, Benkhaldoun, Zouhair, additional, Benni, Paul, additional, Bernacki, Krzysztof, additional, Boyle, Andrew W., additional, Butler, R. Paul, additional, Caldwell, Douglas A., additional, Chontos, Ashley, additional, Christiansen, Jessie L., additional, Ciardi, David R., additional, Collins, Kevin I., additional, Conti, Dennis M., additional, Crane, Jeffrey D., additional, Daylan, Tansu, additional, Dressing, Courtney D., additional, Eastman, Jason D., additional, Essack, Zahra, additional, Evans, Phil, additional, Everett, Mark E., additional, Fajardo-Acosta, Sergio, additional, Forés-Toribio, Raquel, additional, Furlan, Elise, additional, Ghachoui, Mourad, additional, Gillon, Michaël, additional, Hellier, Coel, additional, Helm, Ian, additional, Howard, Andrew W., additional, Howell, Steve B., additional, Isaacson, Howard, additional, Jehin, Emmanuel, additional, Jenkins, Jon M., additional, Jensen, Eric L. N., additional, Kielkopf, John F., additional, Laloum, Didier, additional, Leonhardes-Barboza, Naunet, additional, Lewin, Pablo, additional, Logsdon, Sarah E., additional, Lubin, Jack, additional, Lund, Michael B., additional, MacDougall, Mason G., additional, Mann, Andrew W., additional, Maslennikova, Natalia A., additional, Massey, Bob, additional, McLeod, Kim K., additional, Muñoz, Jose A., additional, Newman, Patrick, additional, Orlov, Valeri, additional, Plavchan, Peter, additional, Popowicz, Adam, additional, Pozuelos, Francisco J., additional, Pritchard, Tyler A., additional, Radford, Don J., additional, Reefe, Michael, additional, Ricker, George R., additional, Rudat, Alexander, additional, Safonov, Boris S., additional, Schwarz, Richard P., additional, Schweiker, Heidi, additional, Scott, Nicholas J., additional, Seager, S., additional, Shectman, Stephen A., additional, Stockdale, Chris, additional, Tan, Thiam-Guan, additional, Teske, Johanna K., additional, Thomas, Neil B., additional, Timmermans, Mathilde, additional, Vanderspek, Roland, additional, Vermilion, David, additional, Watanabe, David, additional, Weiss, Lauren M., additional, West, Richard G., additional, Zandt, Judah Van, additional, Zejmo, Michal, additional, and Ziegler, Carl, additional

Published
2023
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388. TESS Hunt for Young and Maturing Exoplanets (THYME). IX. A 27 Myr Extended Population of Lower Centaurus Crux with a Transiting Two-planet System

Author

Wood, Mackenna L., primary, Mann, Andrew W., additional, Barber, Madyson G., additional, Bush, Jonathan L., additional, Kraus, Adam L., additional, Tofflemire, Benjamin M., additional, Vanderburg, Andrew, additional, Newton, Elisabeth R., additional, Feiden, Gregory A., additional, Zhou, George, additional, Bouma, Luke G., additional, Quinn, Samuel N., additional, Armstrong, David J., additional, Osborn, Ares, additional, Adibekyan, Vardan, additional, Mena, Elisa Delgado, additional, Sousa, Sergio G., additional, Gagné, Jonathan, additional, Fields, Matthew J., additional, Milburn, Reilly P., additional, Thao, Pa Chia, additional, Schmidt, Stephen P., additional, Gnilka, Crystal L., additional, Howell, Steve B., additional, Law, Nicholas M., additional, Ziegler, Carl, additional, Briceño, César, additional, Ricker, George R., additional, Vanderspek, Roland, additional, Latham, David W., additional, Seager, Sara, additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, Schlieder, Joshua E., additional, Osborn, Hugh P., additional, Twicken, Joseph D., additional, Ciardi, David R., additional, and Huang, Chelsea X., additional

Published
2023
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389. TESS Giants Transiting Giants. III. An Eccentric Warm Jupiter Supports a Period−Eccentricity Relation for Giant Planets Transiting Evolved Stars

Author

Grunblatt, Samuel K., primary, Saunders, Nicholas, additional, Chontos, Ashley, additional, Hattori, Soichiro, additional, Veras, Dimitri, additional, Huber, Daniel, additional, Angus, Ruth, additional, Rice, Malena, additional, Breivik, Katelyn, additional, Blunt, Sarah, additional, Giacalone, Steven, additional, Lubin, Jack, additional, Isaacson, Howard, additional, Howard, Andrew W., additional, Ciardi, David R., additional, Safonov, Boris S., additional, Strakhov, Ivan A., additional, Latham, David W., additional, Bieryla, Allyson, additional, Ricker, George R., additional, Jenkins, Jon M., additional, Tenenbaum, Peter, additional, Shporer, Avi, additional, Morgan, Edward H., additional, Kostov, Veselin, additional, Osborn, Hugh P., additional, Dragomir, Diana, additional, Seager, Sara, additional, Vanderspek, Roland K., additional, and Winn, Joshua N., additional

Published
2023
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391. Publisher Correction: A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270

Author

Günther, Maximilian N., Pozuelos, Francisco J., Dittmann, Jason A., Dragomir, Diana, Kane, Stephen R., Daylan, Tansu, Feinstein, Adina D., Huang, Chelsea X., Morton, Timothy D., Bonfanti, Andrea, Bouma, L. G., Burt, Jennifer, Collins, Karen A., Lissauer, Jack J., Matthews, Elisabeth, Montet, Benjamin T., Vanderburg, Andrew, Wang, Songhu, Winters, Jennifer G., Ricker, George R., Vanderspek, Roland K., Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Armstrong, James D., Barkaoui, Khalid, Batalha, Natalie, Bean, Jacob L., Caldwell, Douglas A., Ciardi, David R., Collins, Kevin I., Crossfield, Ian, Fausnaugh, Michael, Furesz, Gabor, Gan, Tianjun, Gillon, Michaël, Guerrero, Natalia, Horne, Keith, Howell, Steve B., Ireland, Michael, Isopi, Giovanni, Jehin, Emmanuël, Kielkopf, John F., Lepine, Sebastien, Mallia, Franco, Matson, Rachel A., Myers, Gordon, Palle, Enric, Quinn, Samuel N., Relles, Howard M., Rojas-Ayala, Bárbara, Schlieder, Joshua, Sefako, Ramotholo, Shporer, Avi, Suárez, Juan C., Tan, Thiam-Guan, Ting, Eric B., Twicken, Joseph D., and Waite, Ian A.

Published
2019
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392. K2-288Bb: A Small Temperate Planet in a Low-Mass Binary System Discovered by Citizen Scientists

Author

Feinstein, Adina D, Schlieder, Joshua E, Livingston, John H, Ciardi, David R, Howard, Andrew W, Arnold, Lauren, Barentsen, Geert, Bristow, Makennah, Christiansen, Jessie L, Crossfield, Ian J. M, Dressing, Courtney D, Gonzales, Erica J, Kosiarek, Molly, Lintott, Chris J, Miller, Grant, Morales, Farisa Y, Petigura, Erik A, Thackeray, Beverly, Ault, Joanne, Baeten, Elisabeth, Jonkeren, Alexander F, Langley, James, Moshinaly, Houssen, Pearson, Kirk, Tanner, Christopher, and Treasure, Joanna

Subjects
Lunar And Planetary Science And Exploration
Abstract

Observations from the Kepler and K2 missions have provided the astronomical community with unprecedented amounts of data to search for transiting exoplanets and other astrophysical phenomena. Here, we present K2-288, a low-mass binary system (M2.0 ± 1.0; M3.0 ± 1.0) hosting a small (Rp=1.9 R), temperate (Teq=226K) planet observed in K2 Campaign 4. The candidate was first identified by citizen scientists using Exoplanet Explorers hosted on the Zooniverse platform. Follow-up observations and detailed analysesvalidate the planet and indicate that it likely orbits the secondary star on a 31.39-day period. This orbit places K2-288Bb in or near the habitable zone of its low-mass host star. K2-288Bb resides in a system with a uniquearchitecture, as it orbits at >0.1 au from one component in a moderate separation binary (a(proj)~55 au), andfurther follow-up may provide insight into its formation and evolution. Additionally, its estimated size straddlesthe observed gap in the planet radius distribution. Planets of this size occur less frequently and may be in atransient phase of radius evolution. K2-288 is the third transiting planet system identified by the ExoplanetExplorers program and its discovery exemplifies the value of citizen science in the era of Kepler, K2, and theTransiting Exoplanet Survey Satellite.

Published
2019
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393. Planetary Candidates from K2 Campaign 16

Author

Yu, Liang, Crossfield, Ian J. M, Schlieder, Joshua E, Kosiarek, Molly R, Feinstein, Adina D, Livingston, John H, Howard, Andrew W, Benneke, Björn, Petigura, Erik A, Bristow, Makennah, Christiansen, Jessie L, Ciardi, David R, Crepp, Justin R, Dressing, Courtney D, Fulton, Benjamin J, Gonzales, Erica J, Hardegree-Ullman, Kevin K, Henning, Thomas, Isaacson, Howard, Lépine, Sébastien, Martinez, Arturo O, Morales, Farisa Y, and Sinukoff, Evan

Subjects
Astrophysics, Lunar And Planetary Science And Exploration
Abstract

Given that Campaign 16 of the K2 mission is one of just two K2 campaigns observed so far in "forward-facing" mode, which enables immediate follow-up observations from the ground, we present a catalog of interesting targets identified through photometry alone. Our catalog includes 30 high-quality planet candidates (showing no signs of being non-planetary in nature), 48 more ambiguous events that may be either planets or false positives, 164 eclipsing binaries, and 231 other regularly periodic variable sources. We have released light curves for all targets in C16 and have also released system parameters and transit vetting plots for all interesting candidates identified in this paper. Of particular interest is a candidate planet orbiting the bright F dwarf HD 73344 (V = 6.9, K = 5.6) with an orbital period of 15 days. If confirmed, this object would correspond to a 2.56 +/- 0.18 R⊕ planet and would likely be a favorable target for radial velocity characterization. This paper is intended as a rapid release of planet candidates, eclipsing binaries, and other interesting periodic variables to maximize the scientific yield of this campaign, and as a test run for the upcoming TESS mission, whose frequent data releases call for similarly rapid candidate identification and efficient follow up.

Published
2018
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394. HD 20329b: An ultra-short-period planet around a solar-type star found by TESS

Author

Murgas, F., Nowak, G., Masseron, T., Parviainen, H., Luque, R., Palle, E., Korth, Judith, Carleo, I., Csizmadia, Sz., Esparza-Borges, E., Alqasim, Ahlam, Cochran, William D., Dai, Fei, Deeg, Hans J., Gandolfi, D., Goffo, Elisa, Kabath, Petr, Lam, K. W. F., Livingston, John, Muresan, Alexandra, Osborne, H. L. M., Persson, Carina M., Serrano, L. M., Smith, Alexis M. S., Van Eylen, Vincent, Orell-Miquel, J., Hinkel, Natalie R., Galán, D., Puig-Subirà, M., Stangret, M., Fukui, A., Kagetani, T., Narita, N., Ciardi, David R., Boyle, Andrew W., Ziegler, Carl, Briceño, César, Law, Nicholas, Mann, Andrew W., Jenkins, Jon M., Latham, David W., Quinn, Samuel N., Ricker, G., Seager, S., Shporer, Avi, Ting, Eric B., Vanderspek, R., Winn, Joshua N., Ministerio de Ciencia e Innovación (España), and European Commission

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Techniques: radial velocities, FOS: Physical sciences, Astronomy and Astrophysics, Planets and satellites: detection, Solar and Stellar Astrophysics (astro-ph.SR), Techniques: photometric, Astrophysics - Earth and Planetary Astrophysics
Abstract

Full list of authors: Murgas, F.; Nowak, G.; Masseron, T.; Parviainen, H.; Luque, R.; Pallé, E.; Korth, J.; Carleo, I.; Csizmadia, S.; Esparza-Borges, E.; Alqasim, A.; Cochran, W. D.; Dai, F.; Deeg, H. J.; Gandolfi, D.; Goffo, E.; Kabáth, P.; Lam, K. W. F.; Livingston, J.; Muresan, A.; Osborne, H. L. M.; Persson, C. M.; Serrano, L. M.; Smith, A. M. S.; Van Eylen, V.; Orell-Miquel, J.; Hinkel, N. R.; Galán, D.; Puig-Subirà, M.; Stangret, M.; Fukui, A.; Kagetani, T.; Narita, N.; Ciardi, D.R.; Boyle, A.W.; Ziegler, C.; Briceño, C.; Law, N.; Mann, A.W.; Jenkins, J.M.; Latham, D.W.; Quinn, S.N.; Ricker, G.; Seager, S.; Shporer, A.; Ting, E. B.; Vanderspek, R.; Winn, J. N.-- This is an Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited., Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. Aims. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. Methods. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results. We confirm and characterize HD 20329b, a USP planet transiting a solar-type star. The host star (HD 20329, V = 8.74 mag, J = 7.5 mag) is characterized by its G5 spectral type with M∗ = 0.90 ± 0.05 M⊙, R∗ = 1.13 ± 0.02 R⊙, and Teff = 5596 ± 50 K; it is located at a distance d = 63.68 ± 0.29 pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261 ± (0.5 ×10-4) days, a planetary radius of 1.72 ± 0.07 R∗, and a mass of 7.42 ± 1.09 M∗, implying a mean density of ρp = 8.06 ± 1.53 g cm-3. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements. © F. Murgas et al. 2022., T.M. acknowledges financial support from the Spanish Ministry of Science and Innovation (MICINN) through the Spanish State Research Agency, under the Severo Ochoa Program 2020-2023 (CEX2019-000920-S) as well as support from the ACIISI, Consejería de Economía, Conocimiento y Empleo del Gobierno de Canarias and the European Regional Development Fund (ERDF) under grant with reference PROID2021010128. R.L. acknowledges funding from University of La Laguna through the Margarita Salas Fellowship from the Spanish Ministry of Universities ref. UNI/551/2021-May 26 under the EU Next Generation funds and financial support from the Spanish Ministerio de Ciencia e Innovación, through project PID2019-109522GB-C52, and the Centre of Excellence “Severo Ochoa” award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709). PK acknolwedges the support from grant LTT-20015. K.W.F.L. was supported by Deutsche Forschungsgemeinschaft grants RA714/14-1 within the DFG Schwerpunkt SPP 1992, Exploring the Diversity of Extrasolar Planets. HJD acknowledges support from the Spanish Research Agency of the Ministry of Science and Innovation (AEI-MICINN) under the grant PID2019-107061GB-C66, DOI: 10.13039/501100011033. C.M.P. and J.K. gratefully acknowledge the support of the Swedish National Space Agency (DNR 65/19 2020-00104). This paper includes data collected by the TESS mission, which are publicly available from the Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided by NASA’s Science Mission directorate. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. This research has made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This publication makes use of data products from the AAVSO Photometric All Sky Survey (APASS). Funded by the Robert Martin Ayers Sciences Fund and the National Science Foundation. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This work made use of tpfplotter by J. Lillo-Box (publicly available in www.github.com/jlillo/tpfplotter), which also made use of the python packages astropy, lightkurve, matplotlib and numpy. This work is partly supported by JSPS KAKENHI Grant Numbers JP17H04574, JP18H05442, JST CREST Grant Number JPMJCR1761, and the Astrobiology Center of National Institutes of Natural Sciences (NINS) (Grant Number AB031010). This paper is based on observations made with the MuSCAT2 instrument, developed by ABC, at Telescopio Carlos Sánchez operated on the island of Tenerife by the IAC in the Spanish Observatorio del Teide.

Published
2022

395. VaTEST I: Validation of Sub-Saturn Exoplanet TOI-181b in Narrow Orbit from its Host Star

Author

Mistry, Priyashkumar, Pathak, Kamlesh, Lekkas, Georgios, Prasad, Aniket, Bhattarai, Surendra, Maity, Mousam, Beichman, Charles A., Ciardi, David R., Evans, Phil, Bieryla, Allyson, Eastman, Jason D., Latham, David W., Esquerdo, Gilbert A., and Lucero, Jennifer P.

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract

We present here a validation of sub-Saturn exoplanet TOI-181b orbiting a K spectral type star TOI-181 (Mass: 0.822 $\pm$ 0.04 M$_{\odot}$, Radius: 0.745 $\pm$ 0.02 R$_{\odot}$, Temperature: 4994 $\pm$ 50 K) as a part of Validation of Transiting Exoplanets using Statistical Tools (VaTEST) project. TOI-181b is a planet with radius 6.95 $\pm$ 0.08 R$_{\oplus}$, mass 46.16 $\pm$ 2.71 M$_{\oplus}$, orbiting in a slightly eccentric orbit with eccentricity 0.15 $\pm$ 0.06 and semi-major axis of 0.054 $\pm$ 0.004 AU, with an orbital period of 4.5320 $\pm$ 0.000002 days. The transit photometry data was collected using Transiting Exoplanet Survey Satellite (TESS) and spectroscopic data for radial velocity analysis was collected using The European Southern Observatory's (ESO) High Accuracy Radial Velocity Planet Searcher (HARPS) telescope. Based on the radial velocity best-fit model we measured RV semi-amplitude to be 20.56 $\pm$ 2.37 m s$^{-1}$. Additionally, we used \texttt{VESPA} and \texttt{TRICERATOPS} to compute the False Positive Probability (FPP), and the findings were FPP values of $1.68\times10^{-14}$ and $3.81\times10^{-04}$, respectively, which are significantly lower than the 1% threshold. The finding of TOI-181b is significant in the perspective of future work on the formation and migration history of analogous planetary systems since warm sub-Saturns are uncommon in the known sample of exoplanets., 13 pages, 10 figures, submitted to MNRAS, Structural changes are made, New results

Published
2022

396. Occurrence Rate of Hot Jupiters Around Early-type M Dwarfs Based on Transiting Exoplanet Survey Satellite Data

Author

Gan, Tianjun, primary, Wang, Sharon X., additional, Wang, Songhu, additional, Mao, Shude, additional, Huang, Chelsea X., additional, Collins, Karen A., additional, Stassun, Keivan G., additional, Shporer, Avi, additional, Zhu, Wei, additional, Ricker, George R., additional, Vanderspek, Roland, additional, Latham, David W., additional, Seager, Sara, additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, Barkaoui, Khalid, additional, Belinski, Alexander A., additional, Ciardi, David R., additional, Evans, Phil, additional, Girardin, Eric, additional, Maslennikova, Nataliia A., additional, Mazeh, Tsevi, additional, Panahi, Aviad, additional, Pozuelos, Francisco J., additional, Radford, Don J., additional, Schwarz, Richard P., additional, Twicken, Joseph D., additional, Wünsche, Anaël, additional, and Zucker, Shay, additional

Published
2022
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397. TOI 560: Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS, and HIRES RVs

Author

El Mufti, Mohammed, primary, Plavchan, Peter P., additional, Isaacson, Howard, additional, Cale, Bryson L., additional, Feliz, Dax L., additional, Reefe, Michael A., additional, Hellier, Coel, additional, Stassun, Keivan, additional, Eastman, Jason, additional, Polanski, Alex, additional, Crossfield, Ian J. M., additional, Gaidos, Eric, additional, Kostov, Veselin, additional, Wittrock, Justin M., additional, Villaseñor, Joel, additional, Schlieder, Joshua E., additional, Bouma, Luke G., additional, Collins, Kevin I., additional, Zohrabi, Farzaneh, additional, Lee, Rena A., additional, Sohani, Ahmad, additional, Berberian, John, additional, Vermilion, David, additional, Newman, Patrick, additional, Geneser, Claire, additional, Tanner, Angelle, additional, Batalha, Natalie M., additional, Dressing, Courtney, additional, Fulton, Benjamin, additional, Howard, Andrew W., additional, Huber, Daniel, additional, Kane, Stephen R., additional, Petigura, Erik A., additional, Robertson, Paul, additional, Roy, Arpita, additional, Weiss, Lauren M., additional, Behmard, Aida, additional, Beard, Corey, additional, Chontos, Ashley, additional, Dai, Fei, additional, Dalba, Paul A., additional, Fetherolf, Tara, additional, Giacalone, Steven, additional, Hill, Michelle L., additional, Hirsch, Lea A., additional, Holcomb, Rae, additional, Lubin, Jack, additional, Mayo, Andrew, additional, Močnik, Teo, additional, Akana Murphy, Joseph M., additional, Rosenthal, Lee J., additional, Rubenzahl, Ryan A., additional, Scarsdale, Nicholas, additional, Stockdale, Christopher, additional, Collins, Karen, additional, Cloutier, Ryan, additional, Relles, Howard, additional, Tan, Thiam-Guan, additional, Scott, Nicholas J, additional, Hartman, Zach, additional, Matthews, Elisabeth, additional, Ciardi, David R., additional, Gonzales, Erica, additional, Matson, Rachel A., additional, Beichman, Charles, additional, Bieryla, Allyson, additional, Furlan, E., additional, Gnilka, Crystal L., additional, Howell, Steve B., additional, Ziegler, Carl, additional, Briceño, César, additional, Law, Nicholas, additional, Mann, Andrew W., additional, Rabus, Markus, additional, Johnson, Marshall C., additional, Christiansen, Jessie, additional, Kreidberg, Laura, additional, Berardo, David Anthony, additional, Deming, Drake, additional, Gorjian, Varoujan, additional, Morales, Farisa Y., additional, Benneke, Björn, additional, Dragomir, Diana, additional, Wittenmyer, Robert A., additional, Ballard, Sarah, additional, Bowler, Brendan P., additional, Horner, Jonathan, additional, Kielkopf, John, additional, Liu, Huigen, additional, Shporer, Avi, additional, Tinney, C. G., additional, Zhang, Hui, additional, Wright, Duncan J., additional, Addison, Brett C., additional, Mengel, Matthew W., additional, and Okumura, Jack, additional

Published
2022
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399. TESS discovery of a super-Earth and two sub-Neptunes orbiting the bright, nearby, Sun-like star HD 22946

Author

Cacciapuoti, Luca, primary, Inno, Laura, additional, Covone, Giovanni, additional, Kostov, Veselin B., additional, Barclay, Thomas, additional, Quintana, Elisa V., additional, Colon, Knicole D., additional, Stassun, Keivan G., additional, Hord, Benjamin, additional, Giacalone, Steven, additional, Kane, Stephen R., additional, Hoffman, Kelsey, additional, Rowe, Jason, additional, Wang, Gavin, additional, Collins, Kevin I., additional, Collins, Karen A., additional, Tan, Thiam-Guan, additional, Gallo, Francesco, additional, Magliano, Christian, additional, Ienco, Riccardo M., additional, Rabus, Markus, additional, Ciardi, David R., additional, Furlan, Elise, additional, Howell, Steve B., additional, Gnilka, Crystal L., additional, Scott, Nicholas J., additional, Lester, Kathryn V., additional, Ziegler, Carl, additional, Briceño, César, additional, Law, Nicholas, additional, Mann, Andrew W., additional, Burke, Christopher J., additional, Quinn, Samuel N., additional, Ciaramella, Angelo, additional, De Luca, Pasquale, additional, Fiscale, Stefano, additional, Rotundi, Alessandra, additional, Marcellino, Livia, additional, Galletti, Ardelio, additional, Bifulco, Ida, additional, Oliva, Fabrizio, additional, Spencer, Alton, additional, Kaltenegger, Lisa, additional, McDermott, Scott, additional, Essack, Zahra, additional, Jenkins, Jon M., additional, Wohler, Bill, additional, Winn, Joshua N., additional, Seager, S., additional, Vanderspek, Roland, additional, Zhou, George, additional, Shporer, Avi, additional, Dragomir, Diana, additional, and Fong, William, additional

Published
2022
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400. A systematic validation of hot Neptunes in TESS data

Author

Magliano, Christian, primary, Covone, Giovanni, additional, Dobal, Richa, additional, Cacciapuoti, Luca, additional, Tonietti, Luca, additional, Giacalone, Steven, additional, Vines, Jose I, additional, Inno, Laura, additional, Jenkins, James S, additional, Lissauer, Jack J, additional, Bieryla, Allyson, additional, Oliva, Fabrizio, additional, Pagano, Isabella, additional, Kostov, Veselin, additional, Ziegler, Carl, additional, Ciardi, David R, additional, Gonzales, Erica J, additional, Dressing, Courtney D, additional, Buchhave, Lars A, additional, Howell, Steve B, additional, Matson, Rachel A, additional, Matthews, Elisabeth, additional, Rotundi, Alessandra, additional, Alves, Douglas, additional, Fiscale, Stefano, additional, Ienco, Riccardo M, additional, Peña, Pablo, additional, Gallo, Francesco, additional, and Muscari Tomajoli, Maria T, additional

Published
2022
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