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2. 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
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3. 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
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5. 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
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We report the discovery of a 'folded' gravitationally lensed image, 'Hamilton's Object', found in a HST image of the field near the AGN SDSS J223010.47-081017.8 ($z=0.62$). The lensed images are sourced by a galaxy at a spectroscopic redshift of 0.8200$\pm0.0005$ and form a fold configuration on a caustic caused by a foreground galaxy cluster at a photometric redshift of 0.526$\pm0.018$ 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 et al. (2019). The analysis is in accordance with a mass density which hardly varies on an arc-second scale (6 kpc) over the areas covered by the multiple images., Comment: 20 pages, 15 figures, 4 tables, accepted for publication in MNRAS

Published
2021
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6. Observations of the gamma-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, Järvelä, Emilia, Komossa, S., Mathur, Smita, and Rabien, Sebastian

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The gamma-ray emitting galaxy SBS 0846+513 has been classified as a Narrow-Line Seyfert 1 from its spectroscopy, and on that basis it was thought likely to have a small central black hole hosted in a spiral galaxy. But very few of the gamma-ray Narrow-Line Seyfert 1s have high-resolution imaging of their hosts, so it is unknown how those expectations hold up for the gamma-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 $7.70 \leq \log \frac{\text{M}}{\text{M}_\odot} \leq 8.19$, using the correlation with bulge luminosity, or $7.96 \leq \log \frac{\text{M}}{\text{M}_\odot} \leq 8.16$ using the correlation with S\'{e}rsic index, putting its mass at the high end of the Narrow Line Seyfert 1 range. These estimates are independent of the Broad Line Region viewing geometry and avoid underestimates due to looking down the jet axis. Its host shows evidence of a bulge + disc structure, both from two-dimensional modeling and isophote shape, in keeping with the expectations. Mergers and interactions appear to be common among the gamma-ray Narrow-Line Seyfert 1s, and we see some circumstantial evidence for companion galaxies or disturbed features in the host., Comment: 10 pages, 6 figures. Submitted to MNRAS

Published
2020
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8. A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies

Author

Rahmani, Hadi, Peroux, Celine, Turnshek, David A., Rao, Sandhya M., Quiret, Samuel, Hamilton, Timothy S., Kulkarni, Varsha P., and Monier, Eric M.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the study of a sample of nine QSO fields, with damped-Ly-alpha (DLA) or sub-DLA systems at z~0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. By suitably positioning the X-Shooter slit based on high spatial resolution images of HST/ACS we are able to detect absorbing galaxies in 7 out of 9 fields (~ 78\% success rate) at impact parameters from 10 to 30 kpc. In 5 out of 7 fields the absorbing galaxies are confirmed via detection of multiple emission lines at the redshift of DLAs where only 1 out of 5 also emits a faint continuum. In 2 out of these 5 fields we detect a second galaxy at the DLA redshift. Extinction corrected star formation rates (SFR) of these DLA-galaxies, estimated using their H-alpha fluxes, are in the range 0.3-6.7 M_sun yr^-1. The emission metallicities of these five DLA-galaxies are estimated to be from 0.2 to 0.9 Z_sun. Based on the Voigt profile fits to absorption lines we find the metallicity of the absorbing neutral gas to be in a range of 0.05--0.6 Z_sun. The two remaining DLA-galaxies are quiescent galaxies with SFR < 0.4 M_sun yr^-1 (3-sigma) presenting continuum emission but weak or no emission lines. Using X-Shooter spectrum we estimate i-band absolute magnitude of -19.5+/-0.2 for both these DLA-galaxies that indicates they are sub-L* galaxies. Comparing our results with that of other surveys in the literature we find a possible redshift evolution of the SFR of DLA-galaxies., Comment: MNRAS accepted

Published
2016
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15. 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

17. 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
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19. 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
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26. Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy

Author

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

Published
2021
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27. FC20: Virtual Reality in Palliative Care Teaching - Results of a longitudinal survey study

Author

Taubert, Mark, Webber, Lucy, Hamilton, Timothy, Carr, Madeleine, Hapgood, Glenn, Harvey, Mark, Patel, Mitali, and Daisley-Devoy, Tara

Abstract

Background: Virtual reality immersive environments have been shown to be effective in medical teaching. Our university hospital received funding from our deanery to film teaching videos with a 360 degree camera.\ud \ud Aims: Evaluate whether Virtual Reality is an effective teaching environment. Virtual Reality headsets were set up for medical students who rotated through Velindre Cancer Hospital’s Palliative Care department.\ud \ud Methods: Students watched a 27 minute video on nausea & vomiting in palliative care settings in a virtual tutorial space. They subsequently viewed a radiotherapy treatment experience.\ud \ud Results: Of the 72 medical students who participated, 70 found the experience comfortable, with 2 students stating they found it uncomfortable (tight headset, blurry visuals). Numerical scoring on ability to concentrate in VR from 0-10 (0=worst, 10=best) scored an average of\ud 8.44 (range 7-10). Asked whether this format suited their learning style, average score was 8.31 (range 6-10). 97.2% (n=70) students stated that they would recommend this form of learning to a colleague, with 1 student saying he/she would not recommend and 1 student stating he/she was unsure. Students left positive & negative free text comments which helped frame future needs in this emerging area and will be presented.\ud \ud Discussion: This study indicates that there is room for exploring new ways of delivering teaching and expanding it more widely in palliative care, but also provides feedback on areas that need further careful attention. Comments from students included: “Might have been the novelty factor but I learned more from this 20 minute VR thing than I have from many lectures”\ud \ud Summary: The project has proved so popular in medical student feedback that the VR experience is now available on Youtube & has been expanded to routine teaching. It has been viewed worldwide incl Africa, so this format of teaching could prove valuable and promising in its potential for global reach.

Published
2019

30. A study of the circumgalactic medium at z similar to 0.6 using damped Lyman alpha galaxies

Author

Rahmani, Hadi, Peroux, Celine, Turnshek, David A., Rao, Sandhya M., Quiret, Samuel, Hamilton, Timothy S., Kulkarni, Varsha P., Monier, Eric M., Zafar, Tayyaba, Laboratoire d'Astrophysique de Marseille (LAM), and 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)

Subjects
[SDU]Sciences of the Universe [physics], Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics
Abstract

International audience; We present the study of a sample of nine quasi-stellar object fields, with damped Lyman alpha (DLA) or sub-DLA systems at z similar to 0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. By suitably positioning the X-Shooter slit based on high spatial resolution images of Hubble Space Telescope/Advanced Camera for Surveys we are able to detect absorbing galaxies in seven out of nine fields (similar to 78 per cent success rate) at impact parameters from 10 to 30 kpc. In five out of seven fields the absorbing galaxies are confirmed via detection of multiple emission lines at the redshift of DLAs where only one out of five also emits a faint continuum. In two out of these five fields we detect a second galaxy at the DLA redshift. Extinction corrected star formation rates (SFRs) of these DLA galaxies, estimated using their H alpha fluxes, are in the range 0.3-6.7 M-aS (TM) yr(-1). The emission metallicities of these five DLA galaxies are estimated to be from 0.2 to 0.9 Z(aS (TM)). Based on the Voigt profile fits to absorption lines we find the metallicity of the absorbing neutral gas to be in a range of 0.05-0.6 Z(aS (TM)). The two remaining DLA galaxies are quiescent galaxies with SFR \textless 0.4 M-aS (TM) yr(-1) (3 sigma) presenting continuum emission but no emission lines. Using X-Shooter spectrum we estimate i-band absolute magnitude of -19.5 +/- 0.2 for both these DLA galaxies that indicates they are sub-L-a \textlessdagger galaxies. Comparing our results with that of other surveys in the literature we find a possible redshift evolution of the SFR of DLA galaxies.

Published
2016

37. 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
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