Results 1 to 10 of about 218 (186)

Physical Characterization of Early Galaxies in the Webb’s First Deep Field SMACS J0723.3-7327

The Astrophysical Journal Letters, 2023
This paper highlights initial photometric analyses of JWST NIRCam imaging data in the sightline of SMACS0723, aiming to identify galaxies at redshift z > 7.
T. Morishita, M. Stiavelli
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Early Results from GLASS-JWST. XIX. A High Density of Bright Galaxies at z ≈ 10 in the A2744 Region

The Astrophysical Journal Letters, 2023
We report the detection of a high density of redshift z ≈ 10 galaxies behind the foreground cluster A2744, selected from imaging data obtained recently with NIRCam on board JWST by three programs—GLASS-JWST, UNCOVER, and DDT#2756.
Marco Castellano, Adriano Fontana, Tommaso Treu, Emiliano Merlin, Paola Santini, Pietro Bergamini, Claudio Grillo, Piero Rosati, Ana Acebron, Nicha Leethochawalit, Diego Paris, Andrea Bonchi, Davide Belfiori, Antonello Calabrò, Matteo Correnti, Mario Nonino, Gianluca Polenta, Michele Trenti, Kristan Boyett, G. Brammer, Tom Broadhurst, Gabriel B. Caminha, Wenlei Chen, Alexei V. Filippenko, Flaminia Fortuni, Karl Glazebrook, Sara Mascia, Charlotte A. Mason, Nicola Menci, Massimo Meneghetti, Amata Mercurio, Benjamin Metha, Takahiro Morishita, Themiya Nanayakkara, Laura Pentericci, Guido Roberts-Borsani, Namrata Roy, Eros Vanzella, Benedetta Vulcani, Lilan Yang, Xin Wang   +40 more
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A Mixture of LBG Overdensities in the Fields of Three 6 < z < 7 Quasars: Implications for the Robustness of Photometric Selection

The Astrophysical Journal, 2023
The most luminous quasars at z > 6 are suspected to be both highly clustered and to reside in the most massive dark matter halos in the early universe, making them prime targets to search for galaxy overdensities and/or protoclusters. We search for Lyman-
Jaclyn B. Champagne, Caitlin M. Casey, Steven L. Finkelstein, Micaela Bagley, Olivia R. Cooper, Rebecca L. Larson, Arianna S. Long, Feige Wang   +7 more
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Broad Emission Lines in Optical Spectra of Hot, Dust-obscured Galaxies Can Contribute Significantly to JWST/NIRCam Photometry

The Astrophysical Journal Letters, 2023
Selecting the first galaxies at z > 7 − 10 from JWST surveys is complicated by z < 6 contaminants with degenerate photometry. For example, strong optical nebular emission lines at z < 6 may mimic JWST/NIRCam photometry of z > 7–10 Lyman-break galaxies ...
Jed McKinney, Luke Finnerty, Caitlin M. Casey, Maximilien Franco, Arianna S. Long, Seiji Fujimoto, Jorge A. Zavala, Olivia Cooper, Hollis Akins, Alexandra Pope, Lee Armus, B. T. Soifer, Kirsten Larson, Keith Matthews, Jason Melbourne, Michael Cushing   +15 more
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Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

The Astrophysical Journal Letters, 2023
Lyman-break galaxy (LBG) candidates at z ≳ 10 are rapidly being identified in James Webb Space Telescope (JWST)/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources are ...
Jorge A. Zavala, Véronique Buat, Caitlin M. Casey, Steven L. Finkelstein, Denis Burgarella, Micaela B. Bagley, Laure Ciesla, Emanuele Daddi, Mark Dickinson, Henry C. Ferguson, Maximilien Franco, E. F. Jiménez-Andrade, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Aurélien Le Bail, E. J. Murphy, Casey Papovich, Sandro Tacchella, Stephen M. Wilkins, Itziar Aretxaga, Peter Behroozi, Jaclyn B. Champagne, Adriano Fontana, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Lisa J. Kewley, Dale D. Kocevski, Allison Kirkpatrick, Jennifer M. Lotz, Laura Pentericci, Pablo G. Pérez-González, Nor Pirzkal, Swara Ravindranath, Rachel S. Somerville, Jonathan R. Trump, Guang Yang, L. Y. Aaron Yung, Omar Almaini, Ricardo O. Amorín, Marianna Annunziatella, Pablo Arrabal Haro, Bren E. Backhaus, Guillermo Barro, Eric F. Bell, Rachana Bhatawdekar, Laura Bisigello, Fernando Buitrago, Antonello Calabrò, Marco Castellano, Óscar A. Chávez Ortiz, Katherine Chworowsky, Nikko J. Cleri, Seth H. Cohen, Justin W. Cole, Kevin C. Cooke, M. C. Cooper, Asantha R. Cooray, Luca Costantin, Isabella G. Cox, Darren Croton, Romeel Davé, Alexander de la Vega, Avishai Dekel, David Elbaz, Vicente Estrada-Carpenter, Vital Fernández, Keely D. Finkelstein, Jonathan Freundlich, Seiji Fujimoto, Ángela García-Argumánez, Jonathan P. Gardner, Eric Gawiser, Carlos Gómez-Guijarro, Yuchen Guo, Timothy S. Hamilton, Nimish P. Hathi, Benne W. Holwerda, Michaela Hirschmann, Marc Huertas-Company, Taylor A. Hutchison, Kartheik G. Iyer, Anne E. Jaskot, Saurabh W. Jha, Shardha Jogee, Stéphanie Juneau, Intae Jung, Susan A. Kassin, Peter Kurczynski, Rebecca L. Larson, Gene C. K. Leung, Arianna S. Long, Ray A. Lucas, Benjamin Magnelli, Kameswara Bharadwaj Mantha, Jasleen Matharu, Elizabeth J. McGrath, Daniel H. McIntosh, Aubrey Medrano, Emiliano Merlin, Bahram Mobasher, Alexa M. Morales, Jeffrey A. Newman, David C. Nicholls, Viraj Pandya, Marc Rafelski, Kaila Ronayne, Caitlin Rose, Russell E. Ryan Jr., Paola Santini, Lise-Marie Seillé, Ekta A. Shah, Lu Shen, Raymond C. Simons, Gregory F. Snyder, Elizabeth R. Stanway, Amber N. Straughn, Harry I. Teplitz, Brittany N. Vanderhoof, Jesús Vega-Ferrero, Weichen Wang, Benjamin J. Weiner, Christopher N. A. Willmer, Stijn Wuyts, (The CEERS Team)   +124 more
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Early Results From GLASS-JWST. XII. The Morphology of Galaxies at the Epoch of Reionization

The Astrophysical Journal Letters, 2023
Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star formation and dust attenuation.
T. Treu, A. Calabrò, M. Castellano, N. Leethochawalit, E. Merlin, A. Fontana, L. Yang, T. Morishita, M. Trenti, A. Dressler, C. Mason, D. Paris, L. Pentericci, G. Roberts-Borsani, B. Vulcani, K. Boyett, M. Bradac, K. Glazebrook, T. Jones, D. Marchesini, S. Mascia, T. Nanayakkara, P. Santini, V. Strait, E. Vanzella, X. Wang   +25 more
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Spurious Correlations between Galaxies and Multiepoch Image Stacks in the DESI Legacy Surveys

The Astrophysical Journal Supplement Series, 2023
A nonnegligible source of systematic bias in cosmological analyses of galaxy surveys is the on-sky modulation that is caused by foregrounds and variable image characteristics, such as observing conditions.
Edgar Eggert, Boris Leistedt
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JWST's PEARLS: Bright 1.5–2.0 μm Dropouts in the Spitzer/IRAC Dark Field

The Astrophysical Journal Letters, 2022
Using the first epoch of four-band NIRCam observations obtained by the James Webb Space Telescope (JWST) Prime Extragalactic Areas for Reionization and Lensing Science Program in the Spitzer IRAC Dark Field, we search for F150W and F200W dropouts.
Haojing Yan, Seth H. Cohen, Rogier A. Windhorst, Rolf A. Jansen, Zhiyuan Ma, John F. Beacom, Chenxiaoji Ling, Cheng Cheng, Jia-Sheng Huang, Norman A. Grogin, S. P. Willner, Min Yun, Heidi B. Hammel, Stefanie N. Milam, Christopher J. Conselice, Simon P. Driver, Brenda Frye, Madeline A. Marshall, Anton Koekemoer, Christopher N. A. Willmer, Aaron Robotham, Jordan C. J. D’Silva, Jake Summers, Jeremy Lim, Kevin Harrington, Leonardo Ferreira, Jose Maria Diego, Nor Pirzkal, Stephen M. Wilkins, Lifan Wang, Nimish P. Hathi, Adi Zitrin, Rachana A. Bhatawdekar, Nathan J. Adams, Lukas J. Furtak, Peter Maksym, Michael J. Rutkowski, Giovanni G. Fazio   +37 more
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Deep Spitzer/IRAC Data for z ∼ 10 Galaxies Reveal Blue Balmer Break Colors: Young Stellar Populations at ∼500 Myr of Cosmic Time

The Astrophysical Journal, 2023
We present the deepest constraints yet on the median rest-UV+optical spectral energy distribution (SED) of z ∼ 10 galaxies prior to James Webb Space Telescope science operations.
Mauro Stefanon, Rychard J. Bouwens, Ivo Labbé, Garth D. Illingworth, Valentino Gonzalez, Pascal A. Oesch   +5 more
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Nitrogen abundances in star-forming galaxies 2.2 Gyr after the Big Bang are not elevated

Astronomy & Astrophysics
Using deep, medium-resolution, JWST rest-optical spectra of a sample of typical star-forming galaxies (Lyman-break galaxies and Lyman-α emitters) from the LyC22 survey at z ∼ 3, we determined the nebular abundances of N, O, and Ne relative to H for a ...
Schaerer D., Izotov Y. I., Marques-Chaves R., Steidel C. C., Reddy N., Shapley A. E., Mascia S., Chisholm J., Flury S. R., Guseva N., Heckman T., Henry A., Inoue A. K., Jung I., Kusakabe H., Mawatari K., Oesch P., Östlin G., Pentericci L., Roy N., Saldana-Lopez A., Sato R., Vanzella E., Verhamme A., Wang B.   +24 more
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