Search

Your search keyword '"Hamilton, Timothy"' showing total 23 results
Start Over Author "Hamilton, Timothy" Publication Year Range Last 3 years
23 results on '"Hamilton, Timothy"'

1. Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Author

Zavala, Jorge A., Buat, Veronique, Casey, Caitlin M., Burgarella, Denis, Finkelstein, Steven L., Bagley, Micaela B., Ciesla, Laure, Daddi, Emanuele, Dickinson, Mark, Ferguson, Henry C., Franco, Maximilien, Jim'enez-Andrade, E. F., Kartaltepe, Jeyhan S., Koekemoer, Anton M., Bail, Aurélien Le, Murphy, E. J., Papovich, Casey, Tacchella, Sandro, Wilkins, Stephen M., Aretxaga, Itziar, Behroozi, Peter, Champagne, Jaclyn B., Fontana, Adriano, Giavalisco, Mauro, Grazian, Andrea, Grogin, Norman A., Kewley, Lisa J., Kocevski, Dale D., Kirkpatrick, Allison, Lotz, Jennifer M., Pentericci, Laura, Perez-Gonzalez, Pablo G., Pirzkal, Nor, Ravindranath, Swara, Somerville, Rachel S., Trump, Jonathan R., Yang, Guang, Yung, L. Y. Aaron, Almaini, Omar, Amorin, Ricardo O., Annunziatella, Marianna, Haro, Pablo Arrabal, Backhaus, Bren E., Barro, Guillermo, Bell, Eric F., Bhatawdekar, Rachana, Bisigello, Laura, Buitrago, Fernando, Calabro, Antonello, Castellano, Marco, Ortiz, Oscar A. Chavez, Chworowsky, Katherine, Cleri, Nikko J., Cohen, Seth H., Cole, Justin W., Cooke, Kevin C., Cooper, M. C., Cooray, Asantha R., Costantin, Luca, Cox, Isabella G., Croton, Darren, Dave, Romeel, de la Vega, Alexander, Dekel, Avishai, Elbaz, David, Estrada-Carpenter, Vicente, Fernández, Vital, Finkelstein, Keely D., Freundlich, Jonathan, Fujimoto, Seiji, García-Argumánez, Ángela, Gardner, Jonathan P., Gawiser, Eric, Gómez-Guijarro, Carlos, Guo, Yuchen, Hamilton, Timothy S., Hathi, Nimish P., Holwerda, Benne W., Hirschmann, Michaela, Huertas-Company, Marc, Hutchison, Taylor A., Iyer, Kartheik G., Jaskot, Anne E., Jha, Saurabh W., Jogee, Shardha, Juneau, Stéphanie, Jung, Intae, Kassin, Susan A., Kurczynski, Peter, Larson, Rebecca L., Leung, Gene C. K., Long, Arianna, Lucas, Ray A., Magnelli, Benjamin, Mantha, Kameswara Bharadwaj, Matharu, Jasleen, McGrath, Elizabeth J., McIntosh, Daniel H., Medrano, Aubrey, Merlin, Emiliano, Mobasher, Bahram, Morales, Alexa M., Newman, Jeffrey A., Nicholls, David C., Pandya, Viraj, Rafelski, Marc, Ronayne, Kaila, Rose, Caitlin, Ryan Jr., Russell E., Santini, Paola, Seillé, Lise-Marie, Shah, Ekta A., Shen, Lu, Simons, Raymond C., Snyder, Gregory F., Stanway, Elizabeth R., Straughn, Amber N., Teplitz, Harry I., Vanderhoof, Brittany N., Vega-Ferrero, Jesús, Wang, Weichen, Weiner, Benjamin J., Willmer, Christopher N. A., and Wuyts, Stijn

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Lyman Break Galaxy (LBG) candidates at z>10 are rapidly being identified in JWST/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources are expected to drop out in the bluer filters while being well detected in redder filters. However, here we show that dust-enshrouded star-forming galaxies at lower redshifts (z<7) may also mimic the near-infrared (near-IR) colors of z>10 LBGs, representing potential contaminants in LBG candidate samples. First, we analyze CEERS-DSFG-1, a NIRCam dropout undetected in the F115W and F150W filters but detected at longer wavelengths. Combining the JWST data with (sub)millimeter constraints, including deep NOEMA interferometric observations, we show that this source is a dusty star-forming galaxy (DSFG) at z~5.1. We also present a tentative 2.6sigma SCUBA-2 detection at 850um around a recently identified z~16 LBG candidate in the same field and show that, if the emission is real and associated with this candidate, the available photometry is consistent with a z~5 dusty galaxy with strong nebular emission lines despite its blue near-IR colors. Further observations on this candidate are imperative to mitigate the low confidence of this tentative submillimeter emission and its positional uncertainty. Our analysis shows that robust (sub)millimeter detections of NIRCam dropout galaxies likely imply z=4-6 redshift solutions, where the observed near-IR break would be the result of a strong rest-frame optical Balmer break combined with high dust attenuation and strong nebular line emission, rather than the rest-frame UV Lyman break. This provides evidence that DSFGs may contaminate searches for ultra high-redshift LBG candidates from JWST observations., Comment: Published in The Astrophysical Journal Letters (updated to match the published version)

Published
2022
Full Text
View/download PDF

2. A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging

Author

Finkelstein, Steven L., Bagley, Micaela B., Haro, Pablo Arrabal, Dickinson, Mark, Ferguson, Henry C., Kartaltepe, Jeyhan S., Papovich, Casey, Burgarella, Denis, Kocevski, Dale D., Huertas-Company, Marc, Iyer, Kartheik G., Larson, Rebecca L., Pérez-González, Pablo G., Rose, Caitlin, Tacchella, Sandro, Wilkins, Stephen M., Chworowsky, Katherine, Medrano, Aubrey, Morales, Alexa M., Somerville, Rachel S., Yung, L. Y. Aaron, Fontana, Adriano, Giavalisco, Mauro, Grazian, Andrea, Grogin, Norman A., Kewley, Lisa J., Koekemoer, Anton M., Kirkpatrick, Allison, Kurczynski, Peter, Lotz, Jennifer M., Pentericci, Laura, Pirzkal, Nor, Ravindranath, Swara, Ryan Jr., Russell E., Trump, Jonathan R., Yang, Guang, Almaini, Omar, Amorín, Ricardo O., Annunziatella, Marianna, Backhaus, Bren E., Barro, Guillermo, Behroozi, Peter, Bell, Eric F., Bhatawdekar, Rachana, Bisigello, Laura, Bromm, Volker, Buat, Véronique, Buitrago, Fernando, Calabró, Antonello, Casey, Caitlin M., Castellano, Marco, Ortiz, Óscar A. Chávez, Ciesla, Laure, Cleri, Nikko J., Cohen, Seth H., Cole, Justin W., Cooke, Kevin C., Cooper, M. C., Cooray, Asantha R., Costantin, Luca, Cox, Isabella G., Croton, Darren, Daddi, Emanuele, Davé, Romeel, de la Vega, Alexander, Dekel, Avishai, Elbaz, David, Estrada-Carpenter, Vicente, Faber, Sandra M., Fernández, Vital, Finkelstein, Keely D., Freundlich, Jonathan, Fujimoto, Seiji, García-Argumánez, Ángela, Gardner, Jonathan P., Gawiser, Eric, Gómez-Guijarro, Carlos, Guo, Yuchen, Hamilton, Timothy S., Hathi, Nimish P., Holwerda, Benne W., Hirschmann, Michaela, Hutchison, Taylor A., Jaskot, Anne, Jha, Saurabh W., Jogee, Shardha, Juneau, Stéphanie, Jung, Intae, Kassin, Susan A., Bail, Aurélien Le, Leung, Gene C. K., Lucas, Ray A., Magnelli, Benjamin, Mantha, Kameswara Bharadwaj, Matharu, Jasleen, McGrath, Elizabeth J., McIntosh, Daniel H., Merlin, Emiliano, Mobasher, Bahram, Newman, Jeffrey A., Nicholls, David C., Pandya, Viraj, Rafelski, Marc, Ronayne, Kaila, Santini, Paola, Seillé, Lise-Marie, Shah, Ekta A., Shen, Lu, Simons, Raymond C., Snyder, Gregory F., Stanway, Elizabeth R., Straughn, Amber N., Teplitz, Harry I., Vanderhoof, Brittany N., Vega-Ferrero, Jesús, Wang, Weichen, Weiner, Benjamin J., Willmer, Christopher N. A., Wuyts, Stijn, and Zavala, Jorge A.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We report the discovery of a candidate galaxy with a photo-z of z~12 in the first epoch of the JWST Cosmic Evolution Early Release Science (CEERS) Survey. Following conservative selection criteria we identify a source with a robust z_phot = 11.8^+0.3_-0.2 (1-sigma uncertainty) with m_F200W=27.3, and >7-sigma detections in five filters. The source is not detected at lambda < 1.4um in deep imaging from both HST and JWST, and has faint ~3-sigma detections in JWST F150W and HST F160W, which signal a Ly-alpha break near the red edge of both filters, implying z~12. This object (Maisie's Galaxy) exhibits F115W-F200W > 1.9 mag (2-sigma lower limit) with a blue continuum slope, resulting in 99.6% of the photo-z PDF favoring z > 11. All data quality images show no artifacts at the candidate's position, and independent analyses consistently find a strong preference for z > 11. Its colors are inconsistent with Galactic stars, and it is resolved (r_h = 340 +/- 14 pc). Maisie's Galaxy has log M*/Msol ~ 8.5 and is highly star-forming (log sSFR ~ -8.2 yr^-1), with a blue rest-UV color (beta ~ -2.5) indicating little dust though not extremely low metallicity. While the presence of this source is in tension with most predictions, it agrees with empirical extrapolations assuming UV luminosity functions which smoothly decline with increasing redshift. Should followup spectroscopy validate this redshift, our Universe was already aglow with galaxies less than 400 Myr after the Big Bang., Comment: 17 pages, 6 figures, 3 tables, ApJL in press. Summary of changes from original submission: Improvements in astrometry generated a weak detection in F150W that reduces the photo-z to 11.8 but does not increase the likelihood of lower-z solutions. A full discussion of changes from the original version is available at: https://web.corral.tacc.utexas.edu/ceersdata/papers/Maisie_update.pdf

Published
2022
Full Text
View/download PDF

9. A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ∼ 12 Galaxy in Early JWST CEERS Imaging

Author

Finkelstein, Steven L., Bagley, Micaela B., Haro, Pablo Arrabal, Dickinson, Mark, Ferguson, Henry C., Kartaltepe, Jeyhan S., Papovich, Casey, Burgarella, Denis, Kocevski, Dale D., Huertas-Company, Marc, Iyer, Kartheik G., Koekemoer, Anton M., Larson, Rebecca L., Pérez-González, Pablo G., Rose, Caitlin, Tacchella, Sandro, Wilkins, Stephen M., Chworowsky, Katherine, Medrano, Aubrey, Morales, Alexa M., Somerville, Rachel S., Yung, L. Y. Aaron, Fontana, Adriano, Giavalisco, Mauro, Grazian, Andrea, Grogin, Norman A., Kewley, Lisa J., Kirkpatrick, Allison, Kurczynski, Peter, Lotz, Jennifer M., Pentericci, Laura, Pirzkal, Nor, Ravindranath, Swara, Ryan, Russell E., Jr., Trump, Jonathan R., Yang, Guang, and The CEERS Team, Almaini, Omar, Amorín, Ricardo O., Annunziatella, Marianna, Backhaus, Bren E., Barro, Guillermo, Behroozi, Peter, Bell, Eric F., Bhatawdekar, Rachana, Bisigello, Laura, Bromm, Volker, Buat, Véronique, Buitrago, Fernando, Calabrò, Antonello, Casey, Caitlin M., Castellano, Marco, Chávez Ortiz, Óscar A., Ciesla, Laure, Cleri, Nikko J., Cohen, Seth H., Cole, Justin W., Cooke, Kevin C., Cooper, M. C., Cooray, Asantha R., Costantin, Luca, Cox, Isabella G., Croton, Darren, Daddi, Emanuele, Davé, Romeel, de la Vega, Alexander, Dekel, Avishai, Elbaz, David, Estrada-Carpenter, Vicente, Faber, Sandra M., Fernández, Vital, Finkelstein, Keely D., Freundlich, Jonathan, Fujimoto, Seiji, García-Argumánez, Ángela, Gardner, Jonathan P., Gawiser, Eric, Gómez-Guijarro, Carlos, Guo, Yuchen, Hamblin, Kurt, Hamilton, Timothy S., Hathi, Nimish P., Holwerda, Benne W., Hirschmann, Michaela, Hutchison, Taylor A., Jaskot, Anne E., Jha, Saurabh W., Jogee, Shardha, Juneau, Stéphanie, Jung, Intae, Kassin, Susan A., Bail, Aurélien Le, Leung, Gene C. K., Lucas, Ray A., Magnelli, Benjamin, Mantha, Kameswara Bharadwaj, Matharu, Jasleen, McGrath, Elizabeth J., McIntosh, Daniel H., Merlin, Emiliano, Mobasher, Bahram, Newman, Jeffrey A., Nicholls, David C., Pandya, Viraj, Rafelski, Marc, Ronayne, Kaila, Santini, Paola, Seillé, Lise-Marie, Shah, Ekta A., Shen, Lu, Simons, Raymond C., Snyder, Gregory F., Stanway, Elizabeth R., Straughn, Amber N., Teplitz, Harry I., Vanderhoof, Brittany N., Vega-Ferrero, Jesús, Wang, Weichen, Weiner, Benjamin J., Willmer, Christopher N. A., Wuyts, Stijn, Zavala, Jorge A., Finkelstein, Steven L. [0000-0001-8519-1130], Bagley, Micaela B. [0000-0002-9921-9218], Haro, Pablo Arrabal [0000-0002-7959-8783], Dickinson, Mark [0000-0001-5414-5131], Ferguson, Henry C. [0000-0001-7113-2738], Kartaltepe, Jeyhan S. [0000-0001-9187-3605], Papovich, Casey [0000-0001-7503-8482], Burgarella, Denis [0000-0002-4193-2539], Kocevski, Dale D. [0000-0002-8360-3880], Huertas-Company, Marc [0000-0002-1416-8483], Iyer, Kartheik G. [0000-0001-9298-3523], Koekemoer, Anton M. [0000-0002-6610-2048], Larson, Rebecca L. [0000-0003-2366-8858], Pérez-González, Pablo G. [0000-0003-4528-5639], Rose, Caitlin [0000-0002-8018-3219], Tacchella, Sandro [0000-0002-8224-4505], Wilkins, Stephen M. [0000-0003-3903-6935], Chworowsky, Katherine [0000-0003-4922-0613], Morales, Alexa M. [0000-0003-4965-0402], Somerville, Rachel S. [0000-0002-6748-6821], Yung, L. Y. Aaron [0000-0003-3466-035X], Fontana, Adriano [0000-0003-3820-2823], Giavalisco, Mauro [0000-0002-7831-8751], Grazian, Andrea [0000-0002-5688-0663], Grogin, Norman A. [0000-0001-9440-8872], Kewley, Lisa J. [0000-0001-8152-3943], Kirkpatrick, Allison [0000-0002-1306-1545], Kurczynski, Peter [0000-0002-8816-5146], Lotz, Jennifer M. [0000-0003-3130-5643], Pentericci, Laura [0000-0001-8940-6768], Pirzkal, Nor [0000-0003-3382-5941], Ravindranath, Swara [0000-0002-5269-6527], Ryan, Russell E., Jr. [0000-0003-0894-1588], Trump, Jonathan R. [0000-0002-1410-0470], Yang, Guang [0000-0001-8835-7722], Almaini, Omar [0000-0001-9328-3991], Amorín, Ricardo O. [0000-0001-5758-1000], Annunziatella, Marianna [0000-0002-8053-8040], Backhaus, Bren E. [0000-0001-8534-7502], Behroozi, Peter [0000-0002-2517-6446], Bell, Eric F. [0000-0002-5564-9873], Bhatawdekar, Rachana [0000-0003-0883-2226], Bisigello, Laura [0000-0003-0492-4924], Bromm, Volker [0000-0003-0212-2979], Buat, Véronique [0000-0003-3441-903X], Buitrago, Fernando [0000-0002-2861-9812], Calabrò, Antonello [0000-0003-2536-1614], Casey, Caitlin M. [0000-0002-0930-6466], Castellano, Marco [0000-0001-9875-8263], Chávez Ortiz, Óscar A. [0000-0003-2332-5505], Ciesla, Laure [0000-0003-0541-2891], Cleri, Nikko J. [0000-0001-7151-009X], Cohen, Seth H. [0000-0003-3329-1337], Cole, Justin W. [0000-0002-6348-1900], Cooke, Kevin C. [0000-0002-2200-9845], Cooper, M. C. [0000-0003-1371-6019], Cooray, Asantha R. [0000-0002-3892-0190], Costantin, Luca [0000-0001-6820-0015], Cox, Isabella G. [0000-0002-1803-794X], Croton, Darren [0000-0002-5009-512X], Daddi, Emanuele [0000-0002-3331-9590], Davé, Romeel [0000-0003-2842-9434], de la Vega, Alexander [0000-0002-6219-5558], Dekel, Avishai [0000-0003-4174-0374], Elbaz, David [0000-0002-7631-647X], Estrada-Carpenter, Vicente [0000-0001-8489-2349], Fernández, Vital [0000-0003-0531-5450], Finkelstein, Keely D. [0000-0003-0792-5877], Freundlich, Jonathan [0000-0002-5245-7796], Fujimoto, Seiji [0000-0001-7201-5066], García-Argumánez, Ángela [0000-0002-8365-5525], Gardner, Jonathan P. [0000-0003-2098-9568], Gawiser, Eric [0000-0003-1530-8713], Gómez-Guijarro, Carlos [0000-0002-4085-9165], Guo, Yuchen [0000-0002-4162-6523], Hamblin, Kurt [0000-0002-6292-4589], Hamilton, Timothy S. [0000-0002-9753-1769], Hathi, Nimish P. [0000-0001-6145-5090], Holwerda, Benne W. [0000-0002-4884-6756], Hirschmann, Michaela [0000-0002-3301-3321], Hutchison, Taylor A. [0000-0001-6251-4988], Jaskot, Anne E. [0000-0002-6790-5125], Jha, Saurabh W. [0000-0001-8738-6011], Jogee, Shardha [0000-0002-1590-0568], Juneau, Stéphanie [0000-0002-0000-2394], Jung, Intae [0000-0003-1187-4240], Kassin, Susan A. [0000-0002-3838-8093], Bail, Aurélien Le [0000-0002-9466-2763], Leung, Gene C. K. [0000-0002-9393-6507], Lucas, Ray A. [0000-0003-1581-7825], Magnelli, Benjamin [0000-0002-6777-6490], Matharu, Jasleen [0000-0002-7547-3385], McGrath, Elizabeth J. [0000-0001-8688-2443], Merlin, Emiliano [0000-0001-6870-8900], Newman, Jeffrey A. [0000-0001-8684-2222], Nicholls, David C. [0000-0003-0892-5203], Pandya, Viraj [0000-0002-2499-9205], Rafelski, Marc [0000-0002-9946-4731], Ronayne, Kaila [0000-0001-5749-5452], Santini, Paola [0000-0002-9334-8705], Seillé, Lise-Marie [0000-0001-7755-4755], Shah, Ekta A. [0000-0001-7811-9042], Shen, Lu [0000-0001-9495-7759], Simons, Raymond C. [0000-0002-6386-7299], Snyder, Gregory F. [0000-0002-4226-304X], Stanway, Elizabeth R. [0000-0002-8770-809X], Straughn, Amber N. [0000-0002-4772-7878], Teplitz, Harry I. [0000-0002-7064-5424], Vanderhoof, Brittany N. [0000-0002-8163-0172], Vega-Ferrero, Jesús [0000-0003-2338-5567], Wang, Weichen [0000-0002-9593-8274], Weiner, Benjamin J. [0000-0001-6065-7483], Willmer, Christopher N. A. [0000-0001-9262-9997], Wuyts, Stijn [0000-0003-3735-1931], and Apollo - University of Cambridge Repository

Subjects
Galaxies and Cosmology
Abstract

We report the discovery of a candidate galaxy with a photo-z of z ∼ 12 in the first epoch of the James Webb Space Telescope (JWST) Cosmic Evolution Early Release Science Survey. Following conservative selection criteria, we identify a source with a robust z phot = 11.8−0.2+0.3 (1σ uncertainty) with m F200W = 27.3 and ≳7σ detections in five filters. The source is not detected at λ < 1.4 μm in deep imaging from both Hubble Space Telescope (HST) and JWST and has faint ∼3σ detections in JWST F150W and HST F160W, which signal a Lyα break near the red edge of both filters, implying z ∼ 12. This object (Maisie’s Galaxy) exhibits F115W − F200W > 1.9 mag (2σ lower limit) with a blue continuum slope, resulting in 99.6% of the photo-z probability distribution function favoring z > 11. All data-quality images show no artifacts at the candidate’s position, and independent analyses consistently find a strong preference for z > 11. Its colors are inconsistent with Galactic stars, and it is resolved (r h = 340 ± 14 pc). Maisie’s Galaxy has log M */M ⊙ ∼ 8.5 and is highly star-forming (log sSFR ∼ −8.2 yr−1), with a blue rest-UV color (β ∼ −2.5) indicating little dust, though not extremely low metallicity. While the presence of this source is in tension with most predictions, it agrees with empirical extrapolations assuming UV luminosity functions that smoothly decline with increasing redshift. Should follow-up spectroscopy validate this redshift, our universe was already aglow with galaxies less than 400 Myr after the Big Bang.

Published
2022

11. Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Author

Zavala, Jorge A., primary, Buat, Véronique, additional, Casey, Caitlin M., additional, Finkelstein, Steven L., additional, Burgarella, Denis, additional, Bagley, Micaela B., additional, Ciesla, Laure, additional, Daddi, Emanuele, additional, Dickinson, Mark, additional, Ferguson, Henry C., additional, Franco, Maximilien, additional, Jiménez-Andrade, E. F., additional, Kartaltepe, Jeyhan S., additional, Koekemoer, Anton M., additional, Bail, Aurélien Le, additional, Murphy, E. J., additional, Papovich, Casey, additional, Tacchella, Sandro, additional, Wilkins, Stephen M., additional, Aretxaga, Itziar, additional, Behroozi, Peter, additional, Champagne, Jaclyn B., additional, Fontana, Adriano, additional, Giavalisco, Mauro, additional, Grazian, Andrea, additional, Grogin, Norman A., additional, Kewley, Lisa J., additional, Kocevski, Dale D., additional, Kirkpatrick, Allison, additional, Lotz, Jennifer M., additional, Pentericci, Laura, additional, Pérez-González, Pablo G., additional, Pirzkal, Nor, additional, Ravindranath, Swara, additional, Somerville, Rachel S., additional, Trump, Jonathan R., additional, Yang, Guang, additional, Yung, L. Y. Aaron, additional, Almaini, Omar, additional, Amorín, Ricardo O., additional, Annunziatella, Marianna, additional, Haro, Pablo Arrabal, additional, Backhaus, Bren E., additional, Barro, Guillermo, additional, Bell, Eric F., additional, Bhatawdekar, Rachana, additional, Bisigello, Laura, additional, Buitrago, Fernando, additional, Calabrò, Antonello, additional, Castellano, Marco, additional, Chávez Ortiz, Óscar A., additional, Chworowsky, Katherine, additional, Cleri, Nikko J., additional, Cohen, Seth H., additional, Cole, Justin W., additional, Cooke, Kevin C., additional, Cooper, M. C., additional, Cooray, Asantha R., additional, Costantin, Luca, additional, Cox, Isabella G., additional, Croton, Darren, additional, Davé, Romeel, additional, de la Vega, Alexander, additional, Dekel, Avishai, additional, Elbaz, David, additional, Estrada-Carpenter, Vicente, additional, Fernández, Vital, additional, Finkelstein, Keely D., additional, Freundlich, Jonathan, additional, Fujimoto, Seiji, additional, García-Argumánez, Ángela, additional, Gardner, Jonathan P., additional, Gawiser, Eric, additional, Gómez-Guijarro, Carlos, additional, Guo, Yuchen, additional, Hamilton, Timothy S., additional, Hathi, Nimish P., additional, Holwerda, Benne W., additional, Hirschmann, Michaela, additional, Huertas-Company, Marc, additional, Hutchison, Taylor A., additional, Iyer, Kartheik G., additional, Jaskot, Anne E., additional, Jha, Saurabh W., additional, Jogee, Shardha, additional, Juneau, Stéphanie, additional, Jung, Intae, additional, Kassin, Susan A., additional, Kurczynski, Peter, additional, Larson, Rebecca L., additional, Leung, Gene C. K., additional, Long, Arianna S., additional, Lucas, Ray A., additional, Magnelli, Benjamin, additional, Mantha, Kameswara Bharadwaj, additional, Matharu, Jasleen, additional, McGrath, Elizabeth J., additional, McIntosh, Daniel H., additional, Medrano, Aubrey, additional, Merlin, Emiliano, additional, Mobasher, Bahram, additional, Morales, Alexa M., additional, Newman, Jeffrey A., additional, Nicholls, David C., additional, Pandya, Viraj, additional, Rafelski, Marc, additional, Ronayne, Kaila, additional, Rose, Caitlin, additional, Ryan, Russell E., additional, Santini, Paola, additional, Seillé, Lise-Marie, additional, Shah, Ekta A., additional, Shen, Lu, additional, Simons, Raymond C., additional, Snyder, Gregory F., additional, Stanway, Elizabeth R., additional, Straughn, Amber N., additional, Teplitz, Harry I., additional, Vanderhoof, Brittany N., additional, Vega-Ferrero, Jesús, additional, Wang, Weichen, additional, Weiner, Benjamin J., additional, Willmer, Christopher N. A., additional, and Wuyts, Stijn, additional

Published
2023
Full Text
View/download PDF

13. A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ∼ 12 Galaxy in Early JWST CEERS Imaging

Author

Finkelstein, Steven L., primary, Bagley, Micaela B., additional, Haro, Pablo Arrabal, additional, Dickinson, Mark, additional, Ferguson, Henry C., additional, Kartaltepe, Jeyhan S., additional, Papovich, Casey, additional, Burgarella, Denis, additional, Kocevski, Dale D., additional, Huertas-Company, Marc, additional, Iyer, Kartheik G., additional, Koekemoer, Anton M., additional, Larson, Rebecca L., additional, Pérez-González, Pablo G., additional, Rose, Caitlin, additional, Tacchella, Sandro, additional, Wilkins, Stephen M., additional, Chworowsky, Katherine, additional, Medrano, Aubrey, additional, Morales, Alexa M., additional, Somerville, Rachel S., additional, Yung, L. Y. Aaron, additional, Fontana, Adriano, additional, Giavalisco, Mauro, additional, Grazian, Andrea, additional, Grogin, Norman A., additional, Kewley, Lisa J., additional, Kirkpatrick, Allison, additional, Kurczynski, Peter, additional, Lotz, Jennifer M., additional, Pentericci, Laura, additional, Pirzkal, Nor, additional, Ravindranath, Swara, additional, Ryan, Russell E., additional, Trump, Jonathan R., additional, Yang, Guang, additional, Almaini, Omar, additional, Amorín, Ricardo O., additional, Annunziatella, Marianna, additional, Backhaus, Bren E., additional, Barro, Guillermo, additional, Behroozi, Peter, additional, Bell, Eric F., additional, Bhatawdekar, Rachana, additional, Bisigello, Laura, additional, Bromm, Volker, additional, Buat, Véronique, additional, Buitrago, Fernando, additional, Calabrò, Antonello, additional, Casey, Caitlin M., additional, Castellano, Marco, additional, Chávez Ortiz, Óscar A., additional, Ciesla, Laure, additional, Cleri, Nikko J., additional, Cohen, Seth H., additional, Cole, Justin W., additional, Cooke, Kevin C., additional, Cooper, M. C., additional, Cooray, Asantha R., additional, Costantin, Luca, additional, Cox, Isabella G., additional, Croton, Darren, additional, Daddi, Emanuele, additional, Davé, Romeel, additional, de la Vega, Alexander, additional, Dekel, Avishai, additional, Elbaz, David, additional, Estrada-Carpenter, Vicente, additional, Faber, Sandra M., additional, Fernández, Vital, additional, Finkelstein, Keely D., additional, Freundlich, Jonathan, additional, Fujimoto, Seiji, additional, García-Argumánez, Ángela, additional, Gardner, Jonathan P., additional, Gawiser, Eric, additional, Gómez-Guijarro, Carlos, additional, Guo, Yuchen, additional, Hamblin, Kurt, additional, Hamilton, Timothy S., additional, Hathi, Nimish P., additional, Holwerda, Benne W., additional, Hirschmann, Michaela, additional, Hutchison, Taylor A., additional, Jaskot, Anne E., additional, Jha, Saurabh W., additional, Jogee, Shardha, additional, Juneau, Stéphanie, additional, Jung, Intae, additional, Kassin, Susan A., additional, Bail, Aurélien Le, additional, Leung, Gene C. K., additional, Lucas, Ray A., additional, Magnelli, Benjamin, additional, Mantha, Kameswara Bharadwaj, additional, Matharu, Jasleen, additional, McGrath, Elizabeth J., additional, McIntosh, Daniel H., additional, Merlin, Emiliano, additional, Mobasher, Bahram, additional, Newman, Jeffrey A., additional, Nicholls, David C., additional, Pandya, Viraj, additional, Rafelski, Marc, additional, Ronayne, Kaila, additional, Santini, Paola, additional, Seillé, Lise-Marie, additional, Shah, Ekta A., additional, Shen, Lu, additional, Simons, Raymond C., additional, Snyder, Gregory F., additional, Stanway, Elizabeth R., additional, Straughn, Amber N., additional, Teplitz, Harry I., additional, Vanderhoof, Brittany N., additional, Vega-Ferrero, Jesús, additional, Wang, Weichen, additional, Weiner, Benjamin J., additional, Willmer, Christopher N. A., additional, Wuyts, Stijn, additional, and Zavala, Jorge A., additional

Published
2022
Full Text
View/download PDF

18. Hamilton's Object – a clumpy galaxy straddling the gravitational caustic of a galaxy cluster: constraints on dark matter clumping.

Author

Griffiths, Richard E, Rudisel, Mitchell, Wagner, Jenny, Hamilton, Timothy, Huang, Po-Chieh, and Villforth, Carolin

Subjects
DARK matter, PROPERTIES of matter, GALAXY clusters, ACTIVE galactic nuclei, ORTHOGONAL curves, GALACTIC redshift
Abstract

We report the discovery of a 'folded' gravitationally lensed image, 'Hamilton's Object', found in a HST image of the field near the active galactic nucleus SDSS J223010.47-081017.8 (which has redshift 0.62). The lensed images are sourced by a galaxy at a spectroscopic redshift of 0.8200 ± 0.0005 and form a fold configuration on a caustic caused by a foreground galaxy cluster at a photometric redshift of 0.526 ± 0.018 seen in the corresponding Pan-STARRS PS1 image and marginally detected as a faint ROSAT All-Sky Survey X-ray source. The lensed images exhibit properties similar to those of other 'folds' where the source galaxy falls very close to or straddles the caustic of a galaxy cluster. The folded images are stretched in a direction roughly orthogonal to the critical curve, but the configuration is that of a tangential cusp. Guided by morphological features, published simulations and similar 'fold' observations in the literature, we identify a third or 'counter'-image, confirmed by spectroscopy. Because the fold-configuration shows highly distinctive surface brightness features, follow-up observations of microlensing or detailed investigations of the individual surface brightness features at higher resolution can further shed light on kpc-scale dark matter properties. We determine the local lens properties at the positions of the multiple images according to the observation-based lens reconstruction of Wagner. The analysis is in accordance with a mass density which hardly varies on an arcsecond scale (6 kpc) over the areas covered by the multiple images. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

19. Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy.

Author

Hamilton, Timothy S, Berton, Marco, Antón, Sonia, Busoni, Lorenzo, Caccianiga, Alessandro, Ciroi, Stefano, Gässler, Wolfgang, Georgiev, Iskren Y, Järvelä, Emilia, Komossa, S, Mathur, Smita, and Rabien, Sebastian

Subjects
*SEYFERT galaxies, *SPIRAL galaxies, *ADAPTIVE optics, *SUPERMASSIVE black holes, *BLACK holes, *ACTIVE galaxies
Abstract

The γ-ray-emitting galaxy SBS 0846+513 has been classified as a narrow-line Seyfert 1 (NLS1) from its spectroscopy, and on that basis would be thought likely to have a small central black hole hosted in a spiral galaxy. However, very few of the γ-ray NLS1s have high-resolution imaging of their hosts, so it is unknown how the morphology expectation holds up for the γ-emitting class. We have observed this galaxy in the J band with the Large Binocular Telescope's LUCI1 camera and the ARGOS adaptive optics system. We estimate its black hole mass to lie between |$4.2\times 10^7 \le \frac{\rm{\it{ M}}}{\text{M}_\odot } \le 9.7\times 10^7$|⁠ , using the correlation with bulge luminosity, or |$1.9\times 10^7 \le \frac{\rm{\it{ M}}}{\text{M}_\odot } \le 2.4\times 10^7$| using the correlation with Sérsic index. Our favoured estimate is 4.2 × 107 M⊙, putting its mass at the high end of the NLS1 range in general but consistent with others that are γ-ray emitters. These estimates are independent of the broad-line region viewing geometry and avoid any underestimates due to looking down the jet axis. Its host shows evidence of a bulge + disc structure, from the isophote shape and residual structure in the nuclear-subtracted image. This supports the idea that γ-ray NLS1 may be spiral galaxies, like their non-jetted counterparts. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

23. Novel metrics reveal new structure and unappreciated heterogeneity in C. elegans development.

Author

Natesan G, Hamilton T, Deeds EJ, and Shah PK

Abstract

High throughput experimental approaches are increasingly allowing for the quantitative description of cellular and organismal phenotypes. Distilling these large volumes of complex data into meaningful measures that can drive biological insight remains a central challenge. In the quantitative study of development, for instance, one can resolve phenotypic measures for single cells onto their lineage history, enabling joint consideration of heritable signals and cell fate decisions. Most attempts to analyze this type of data, however, discard much of the information content contained within lineage trees. In this work we introduce a generalized metric, which we term the branch distance, that allows us to compare any two embryos based on phenotypic measurements in individual cells. This approach aligns those phenotypic measurements to the underlying lineage tree, providing a flexible and intuitive framework for quantitative comparisons between, for instance, Wild-Type (WT) and mutant developmental programs. We apply this novel metric to data on cell-cycle timing from over 1300 WT and RNAi-treated Caenorhabditis elegans embryos. Our new metric revealed surprising heterogeneity within this data set, including subtle batch effects in WT embryos and dramatic variability in RNAi-induced developmental phenotypes, all of which had been missed in previous analyses. Further investigation of these results suggests a novel, quantitative link between pathways that govern cell fate decisions and pathways that pattern cell cycle timing in the early embryo. Our work demonstrates that the branch distance we propose, and similar metrics like it, have the potential to revolutionize our quantitative understanding of organismal phenotype.

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results