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4 results on '"Dorn, C [0000-0001-6110-4610]"'

1. Ariel planetary interiors White Paper

Author

Ravit Helled, Yuichi Ito, Oliver Shorttle, Caroline Dorn, Yamila Miguel, Tim Lichtenberg, Allona Vazan, Mihkel Kama, Masahiro Ikoma, Stephanie C. Werner, Tristan Guillot, Paul J. Tackley, Diana Valencia, Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Helled, R [0000-0001-5555-2652], Dorn, C [0000-0001-6110-4610], Guillot, T [0000-0002-7188-8428], Ikoma, M [0000-0002-5658-5971], Ito, Y [0000-0002-0598-3021], Lichtenberg, T [0000-0002-3286-7683], Miguel, Y [0000-0002-0747-8862], Valencia, D [0000-0003-3993-4030], Vazan, A [0000-0001-9504-3174], Apollo - University of Cambridge Repository, Astronomy, University of Zurich, and Helled, Ravit

Subjects
Ariel, 010504 meteorology & atmospheric sciences, 530 Physics, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, 01 natural sciences, Astrobiology, Atmospheric composition, Planet composition, Atmosphere-interior interaction, White paper, 1912 Space and Planetary Science, Planet, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Planetary interiors, Radius, Galaxy, Exoplanet, 13. Climate action, Space and Planetary Science, 10231 Institute for Computational Science, Physics::Space Physics, 3103 Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Geology, Astrophysics - Earth and Planetary Astrophysics
Abstract

The recently adopted Ariel ESA mission will measure the atmospheric composition of a large number of exoplanets. This information will then be used to better constrain planetary bulk compositions. While the connection between the composition of a planetary atmosphere and the bulk interior is still being investigated, the combination of the atmospheric composition with the measured mass and radius of exoplanets will push the field of exoplanet characterisation to the next level, and provide new insights of the nature of planets in our galaxy. In this white paper, we outline the ongoing activities of the interior working group of the Ariel mission, and list the desirable theoretical developments as well as the challenges in linking planetary atmospheres, bulk composition and interior structure., Experimental Astronomy, 53, ISSN:0922-6435, ISSN:1572-9508

Published
2022
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2. A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113

Author

Sara Seager, Ravit Helled, Rodrigo F. Díaz, Douglas A. Caldwell, Tansu Daylan, Stéphane Udry, Don Pollacco, J. F. Otegi, David R. Anderson, Keivan G. Stassun, Elisa Delgado-Mena, David J. Armstrong, D. W. Latham, H. P. Osborn, Jeffrey C. Smith, S. C. C. Barros, Edward M. Bryant, Nuno C. Santos, Diana Dragomir, David Barrado, Eric L. N. Jensen, Nicholas M. Law, N. Scott, Cesar Briceno, C. Ziegler, Benjamin V. Rackham, Daniel Bayliss, J. Villasenor, Jon M. Jenkins, Richard G. West, Andrew W. Mann, Peter J. Wheatley, George R. Ricker, Vardan Adibekyan, Magali Deleuil, Jorge Lillo-Box, Louise D. Nielsen, Christopher J. Burke, P. A. Strøm, Karen A. Collins, D. R. Rodriguez, Olivier Demangeon, D. J. A. Brown, Roland Vanderspek, A. Osborn, Coel Hellier, Sergio Hoyer, Joshua N. Winn, P. Figueira, Steve B. Howell, George W. King, Dana R. Louie, François Bouchy, Caroline Dorn, S. G. Sousa, Dennis M. Conti, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Dorn, C. [0000-0001-6110-4610], Anderson, D. [0000-0001-7416-7522], Barros, S. [0000-0003-2434-3625], Adibekyan, V. [0000-0002-0601-6199], Armstrong, D. [0000-0002-5080-4117], Santos, N. [0000-0003-4422-2919], Fundacao para a Ciencia e a Tecnologia (FCT), Science and Technology Facilities Council (STFC), Agencia Estatal de Investigación (AEI), National Aeronautics and Space Administration (NASA), and UK Space Agency

Subjects
010504 meteorology & atmospheric sciences, FOS: Physical sciences, Astrophysics, 01 natural sciences, Atmosphere, purl.org/becyt/ford/1 [https], Planet, QB460, 0103 physical sciences, DETECTION [PLANETS AND SATELLITES], INDIVIDUAL: HD110113 [STARS], 010303 astronomy & astrophysics, QB600, QC, QB, 0105 earth and related environmental sciences, Physics, Earth and Planetary Astrophysics (astro-ph.EP), Stellar rotation, Astronomy and Astrophysics, Radius, purl.org/becyt/ford/1.3 [https], Exoplanet, Radial velocity, Photometry (astronomy), Space and Planetary Science, [SDU]Sciences of the Universe [physics], Mini-Neptune, QB799, Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the discovery of HD 110113 b (TOI-755.01), a transiting mini-Neptune exoplanet on a 2.5-day orbit around the solar-analogue HD 110113 (Teff = 5730K). Using TESS photometry and HARPS radial velocities gathered by the NCORES program, we find HD 110113 b has a radius of $2.05\pm0.12$ $R_\oplus$ and a mass of $4.55\pm0.62$ $M_\oplus$. The resulting density of $2.90^{+0.75}_{-0.59}$ g cm^{-3} is significantly lower than would be expected from a pure-rock world; therefore, HD 110113 b must be a mini-Neptune with a significant volatile atmosphere. The high incident flux places it within the so-called radius valley; however, HD 110113 b was able to hold onto a substantial (0.1-1\%) H-He atmosphere over its $\sim4$ Gyr lifetime. Through a novel simultaneous gaussian process fit to multiple activity indicators, we were also able to fit for the strong stellar rotation signal with period $20.8\pm1.2$ d from the RVs and confirm an additional non-transiting planet with a mass of $10.5\pm1.2$ $M_\oplus$ and a period of $6.744^{+0.008}_{-0.009}$ d., Comment: 17 pages, 11 figures. Accepted for publication at MNRAS. HARPS RVs available at https://dace.unige.ch/radialVelocities/?pattern=HD110113

Published
2021
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3. Mass determinations of the three mini-Neptunes transiting TOI-125

Author

Farzana Meru, Matías R. Díaz, John H. Livingston, Florian Rodler, Samuel N. Quinn, Pablo Rojas, Heike Rauer, Diana Kossakowski, Isabelle Boisse, George R. Ricker, P. T. Boyd, Ravit Helled, Judith Korth, S. C. C. Barros, L. A. dos Santos, A. P. Hatzes, S. Sabotta, Rafael Luque, M. Stalport, Andrew Vanderburg, Jason H. Steffen, Vincent Van Eylen, Edward M. Bryant, Jon M. Jenkins, David J. Armstrong, L. González-Cuesta, S. Hojjatpanah, Norio Narita, Felipe Murgas, Savita Mathur, J. F. Otegi, Paul Wilson, Iskra Georgieva, Nicolás T. Kurtovic, Sara Seager, Emeline Bolmont, Xavier Dumusque, Jose I. Vines, M. Esposito, Z. M. Berdinas, Sascha Grziwa, Olivier Demangeon, J. M. Almenara, O. Mousis, Julia V. Seidel, D. J. A. Brown, T. Lopez, A. Santerne, S. G. Sousa, Benjamin F. Cooke, Davide Gandolfi, R. A. Garcia, Eric B. Ting, Fei Dai, David W. Latham, Daniel Bayliss, Romain Allart, Peter J. Wheatley, François Bouchy, Christopher J. Burke, Vardan Adibekyan, Seth Redfield, Hugh P. Osborn, Natalia Guerrero, Joshua N. Winn, Malcolm Fridlund, Martin Turbet, Louise D. Nielsen, Chris Henze, Caroline Dorn, J. Dittman, K. W. F. Lam, Carina M. Persson, William D. Cochran, Jorge Lillo-Box, Rodrigo F. Díaz, Stéphane Udry, Nuno C. Santos, David Barrado, Enric Palle, James S. Jenkins, Roland Vanderspek, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Vanderburg, A. [0000-0001-7246-5438], Dos Santos, L. [0000-0002-2248-3838], Barrado, D. [0000-0002-5971-9242], Cochran, W. [0000-0001-9662-3496], Lillo Box, J. [0000-0003-3742-1987], Barros, S. [0000-0003-2434-3625], Stalport, M. [0000-0003-0996-6402], Dorn, C. [0000-0001-6110-4610], Nielsen, L. D. [0000-0002-5254-2499], Seidel, J. V. [0000-0002-7990-9596], Diaz, M. R. [0000-0002-2100-3257], Bolmont, E. [0000-0001-5657-4503], Adibekyan, V. [0000-0002-0601-6199], Van Eylen, V. [0000-0001-5542-8870], Armstrong, D. [0000-0002-5080-4117], Korth, J. [0000-0002-0076-6239], Díaz, R. [0000-0001-9289-5160], Santos, N. [0000-0003-4422-2919], Luque, R. [0000-0002-4671-2957], Turbet, M. [0000-0003-2260-9856], Mathur, S. [0000-0002-0129-0316], Strom, P. A. [0000-0002-7823-1090], Sabotta, S. [0000-0001-9078-5574], Wheatley, P. [0000-0003-1452-2240], Hojjatpanah, S. [0000-0002-0417-1902], Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT), Swiss National Science Foundation (SNSF), Deutsche Forschungsgemeinschaft (DFG), Agencia Estatal de Investigación (AEI), European Southern Observatory (ESO), Swiss National Centre of Competence inResearch (NCCR), National Aeronautics and Space Administration (NASA), Fundacao para a Ciencia e a Tecnologia (FCT), European Research Council (ERC), European Southern Observatory, STFC via an Ernest Rutherford Fellowship, FEDER -Fundo Europeu de Desenvolvimento Regional through COMPETE2020-Programa Operacional Competitividade e Internacionalizacao, Portuguese Foundation for Science and Technology, CONICYT-PFCHA/Doctorado Nacional, Comision Nacional de Investigacion Cientifica y Tecnologica CONICYT FONDECYT, German Research Foundation (DFG), Spanish State Research Agency (AEI), Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, and Spanish Ministry under the Ramon y Cajal fellowship

Subjects
010504 meteorology & atmospheric sciences, Planets and satellites: detection, Planets and satellites: individual: (TOI-125, TIC 52368076), FOS: Physical sciences, 01 natural sciences, Neptune, Planet, TIC 52368076), 0103 physical sciences, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], individual: TOI-125, TIC 52368076 [Planets and satellites], Ecliptic, Astronomy, Astronomy and Astrophysics, Radius, Planets and satellites: detection, Orbital period, Exoplanet, Radial velocity, detection [Planets and satellites], Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics - Earth and Planetary Astrophysics, Planets and satellites: individual: (TOI-125
Abstract

The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of the TESS survey, steady progress was made in achieving the mission's primary science goal of establishing bulk densities for 50 planets smaller than Neptune. During that year, TESS's observations were focused on the southern ecliptic hemisphere, resulting in the discovery of three mini-Neptunes orbiting the star TOI-125, a V=11.0 K0 dwarf. We present intensive HARPS radial velocity observations, yielding precise mass measurements for TOI-125b, TOI-125c and TOI-125d. TOI-125b has an orbital period of 4.65 days, a radius of $2.726 \pm 0.075 ~\mathrm{R_{\rm E}}$, a mass of $ 9.50 \pm 0.88 ~\mathrm{M_{\rm E}}$ and is near the 2:1 mean motion resonance with TOI-125c at 9.15 days. TOI-125c has a similar radius of $2.759 \pm 0.10 ~\mathrm{R_{\rm E}}$ and a mass of $ 6.63 \pm 0.99 ~\mathrm{M_{\rm E}}$, being the puffiest of the three planets. TOI-125d, has an orbital period of 19.98 days and a radius of $2.93 \pm 0.17~\mathrm{R_{\rm E}}$ and mass $13.6 \pm 1.2 ~\mathrm{M_{\rm E}}$. For TOI-125b and TOI-125d we find unusual high eccentricities of $0.19\pm 0.04$ and $0.17^{+0.08}_{-0.06}$, respectively. Our analysis also provides upper mass limits for the two low-SNR planet candidates in the system; for TOI-125.04 ($R_P=1.36 ~\mathrm{R_{\rm E}}$, $P=$0.53 days) we find a $2\sigma$ upper mass limit of $1.6~\mathrm{M_{\rm E}}$, whereas TOI-125.05 ( $R_P=4.2^{+2.4}_{-1.4} ~\mathrm{R_{\rm E}}$, $P=$ 13.28 days) is unlikely a viable planet candidate with upper mass limit $2.7~\mathrm{M_{\rm E}}$. We discuss the internal structure of the three confirmed planets, as well as dynamical stability and system architecture for this intriguing exoplanet system., Comment: Accepted for publication in MNRAS

Published
2020
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4. Refining the Transit-timing and Photometric Analysis of TRAPPIST-1: Masses, Radii, Densities, Dynamics, and Ephemerides

Author

Franck Selsis, Emeline Bolmont, Susan M. Lederer, Brett M. Morris, Renu Malhotra, Caroline Dorn, Marko Sestovic, Sean N. Raymond, Rodrigo Luger, Didier Queloz, Daniel Foreman-Mackey, Martin Turbet, J. Haldemann, Amaury H. M. J. Triaud, Emmanuel Jehin, Francisco J. Pozuelos, Zachary Langford, Eric Agol, Michaël Gillon, Khalid Barkaoui, Daniel C. Fabrycky, Adam J. Burgasser, Simon L. Grimm, Julien de Wit, James G. Ingalls, Brice-Olivier Demory, Sean Carey, Valérie Van Grootel, Victoria S. Meadows, Jérémy Leconte, David M. Hernandez, Artem Burdanov, Laetitia Delrez, Elsa Ducrot, Zouhair Benkhaldoun, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Agol, E [0000-0002-0802-9145], Dorn, C [0000-0001-6110-4610], Grimm, SL [0000-0002-0632-4407], Turbet, M [0000-0003-2260-9856], Ducrot, E [0000-0002-7008-6888], Delrez, L [0000-0001-6108-4808], Gillon, M [0000-0003-1462-7739], Demory, BO [0000-0002-9355-5165], Burdanov, A [0000-0001-9892-2406], Barkaoui, K [0000-0003-1464-9276], Benkhaldoun, Z [0000-0001-6285-9847], Bolmont, E [0000-0001-5657-4503], Burgasser, A [0000-0002-6523-9536], Carey, S [0000-0002-0221-6871], De Wit, J [0000-0003-2415-2191], Fabrycky, D [0000-0003-3750-0183], Foreman-Mackey, D [0000-0002-9328-5652], Haldemann, J [0000-0003-1231-2389], Hernandez, DM [0000-0001-7648-0926], Ingalls, J [0000-0003-4714-1364], Jehin, E [0000-0001-8923-488X], Langford, Z [0000-0001-7574-4440], Leconte, J [0000-0002-3555-480X], Lederer, SM [0000-0003-2805-8653], Luger, R [0000-0002-0296-3826], Malhotra, R [0000-0002-1226-3305], Meadows, VS [0000-0002-1386-1710], Morris, BM [0000-0003-2528-3409], Pozuelos, FJ [0000-0003-1572-7707], Queloz, D [0000-0002-3012-0316], Raymond, SN [0000-0001-8974-0758], Selsis, F [0000-0001-9619-5356], Sestovic, M [0000-0002-8124-8360], Triaud, AHMJ [0000-0002-5510-8751], Van Grootel, V [0000-0003-2144-4316], and Apollo - University of Cambridge Repository

Subjects
010504 meteorology & atmospheric sciences, 530 Physics, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Astrophysics, Ephemeris, 01 natural sciences, Mantle (geology), Spitzer Space Telescope, Planet, 0103 physical sciences, Earth and Planetary Sciences (miscellaneous), Transit (astronomy), 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Physics, Planetary habitability, 520 Astronomy, Astronomy and Astrophysics, Planetary system, 620 Engineering, Light curve, Geophysics, [SDU]Sciences of the Universe [physics], 13. Climate action, Space and Planetary Science, astro-ph.EP, Astrophysics::Earth and Planetary Astrophysics
Abstract

We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST, and K2 transit-time measurements, and revisit an N-body dynamical analysis of the seven-planet system using our complete set of times from which we refine the mass ratios of the planets to the star. We next carry out a photodynamical analysis of the Spitzer light curves to derive the density of the host star and the planet densities. We find that all seven planets’ densities may be described with a single rocky mass–radius relation which is depleted in iron relative to Earth, with Fe 21 wt% versus 32 wt% for Earth, and otherwise Earth-like in composition. Alternatively, the planets may have an Earth-like composition but enhanced in light elements, such as a surface water layer or a core-free structure with oxidized iron in the mantle. We measure planet masses to a precision of 3%–5%, equivalent to a radial-velocity (RV) precision of 2.5 cm s−1, or two orders of magnitude more precise than current RV capabilities. We find the eccentricities of the planets are very small, the orbits are extremely coplanar, and the system is stable on 10 Myr timescales. We find evidence of infrequent timing outliers, which we cannot explain with an eighth planet; we instead account for the outliers using a robust likelihood function. We forecast JWST timing observations and speculate on possible implications of the planet densities for the formation, migration, and evolution of the planet system.

Published
2021
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