The Astrophysical Journal (Jan 2024)
Unveiling the Distant Universe: Characterizing z ≥ 9 Galaxies in the First Epoch of COSMOS-Web
- Maximilien Franco,
- Hollis B. Akins,
- Caitlin M. Casey,
- Steven L. Finkelstein,
- Marko Shuntov,
- Katherine Chworowsky,
- Andreas L. Faisst,
- Seiji Fujimoto,
- Olivier Ilbert,
- Anton M. Koekemoer,
- Daizhong Liu,
- Christopher C. Lovell,
- Claudia Maraston,
- Henry Joy McCracken,
- Jed McKinney,
- Brant E. Robertson,
- Micaela B. Bagley,
- Jaclyn B. Champagne,
- Olivia R. Cooper,
- Xuheng Ding,
- Nicole E. Drakos,
- Andrea Enia,
- Steven Gillman,
- Ghassem Gozaliasl,
- Santosh Harish,
- Christopher C. Hayward,
- Michaela Hirschmann,
- Shuowen Jin,
- Jeyhan S. Kartaltepe,
- Vasily Kokorev,
- Clotilde Laigle,
- Arianna S. Long,
- Georgios Magdis,
- Guillaume Mahler,
- Crystal L. Martin,
- Richard Massey,
- Bahram Mobasher,
- Louise Paquereau,
- Alvio Renzini,
- Jason Rhodes,
- R. Michael Rich,
- Kartik Sheth,
- John D. Silverman,
- Martin Sparre,
- Margherita Talia,
- Benny Trakhtenbrot,
- Francesco Valentino,
- Aswin P. Vijayan,
- Stephen M. Wilkins,
- Lilan Yang,
- Jorge A. Zavala
Affiliations
- Maximilien Franco
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Hollis B. Akins
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Caitlin M. Casey
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Steven L. Finkelstein
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Marko Shuntov
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark
- Katherine Chworowsky
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Andreas L. Faisst
- ORCiD
- Caltech/IPAC , 1200 E. California Blvd., Pasadena, CA 91125, USA
- Seiji Fujimoto
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Olivier Ilbert
- ORCiD
- Aix Marseille Université , CNRS, CNES, LAM, Marseille, France
- Anton M. Koekemoer
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA
- Daizhong Liu
- ORCiD
- Max-Planck-Institut für Extraterrestrische Physik (MPE) , Giessenbachstr. 1, D-85748 Garching, Germany
- Christopher C. Lovell
- ORCiD
- Institute of Cosmology and Gravitation, University of Portsmouth , Burnaby Rd., Portsmouth, PO1 3FX, UK; Astronomy Centre, University of Sussex , Falmer, Brighton, BN1 9QH, UK
- Claudia Maraston
- ORCiD
- Institute of Cosmology and Gravitation, University of Portsmouth , Dennis Sciama Building, Burnaby Road, Portsmouth, PO1 3FX, UK
- Henry Joy McCracken
- ORCiD
- Institut d’Astrophysique de Paris , UMR 7095, CNRS, and Sorbonne Université, 98 bis boulevard Arago, F-75014 Paris, France
- Jed McKinney
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Brant E. Robertson
- ORCiD
- Department of Astronomy and Astrophysics, University of California, Santa Cruz , 1156 High St., Santa Cruz, CA 95064, USA
- Micaela B. Bagley
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Jaclyn B. Champagne
- ORCiD
- Steward Observatory, University of Arizona , 933 N Cherry Ave., Tucson, AZ 85721, USA
- Olivia R. Cooper
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Xuheng Ding
- ORCiD
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo , Kashiwa, Chiba 277-8583, Japan
- Nicole E. Drakos
- ORCiD
- Department of Astronomy and Astrophysics, University of California, Santa Cruz , 1156 High St., Santa Cruz, CA 95064, USA
- Andrea Enia
- ORCiD
- University of Bologna–Department of Physics and Astronomy “Augusto Righi” (DIFA) , Via Gobetti 93/2, I-40129, Bologna, Italy; INAF–Osservatorio di Astrofisica e Scienza dello Spazio , Via Gobetti 93/3, I-40129, Bologna, Italy
- Steven Gillman
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Ghassem Gozaliasl
- ORCiD
- Department of Computer Science, Aalto University , PO Box 15400, Espoo, FI-00 076, Finland; Department of Physics, University of Helsinki , P.O. Box 64, FI-00014 Helsinki, Finland
- Santosh Harish
- ORCiD
- Laboratory for Multiwavelength Astrophysics, School of Physics and Astronomy , Rochester Institute of Technology, 84 Lomb Memorial Dr., Rochester, NY 14623, USA
- Christopher C. Hayward
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Ave., New York, NY 10010, USA
- Michaela Hirschmann
- ORCiD
- Institute of Physics , GalSpec, Ecole Polytechnique Federale de Lausanne, Observatoire de Sauverny, Chemin Pegasi 51, 1290 Versoix, Switzerland; INAF , Astronomical Observatory of Trieste, Via Tiepolo 11, 34131 Trieste, Italy
- Shuowen Jin
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Jeyhan S. Kartaltepe
- ORCiD
- Laboratory for Multiwavelength Astrophysics, School of Physics and Astronomy , Rochester Institute of Technology, 84 Lomb Memorial Dr., Rochester, NY 14623, USA
- Vasily Kokorev
- ORCiD
- Kapteyn Astronomical Institute, University of Groningen , PO Box 800, 9700 AV Groningen, The Netherlands
- Clotilde Laigle
- ORCiD
- Institut d’Astrophysique de Paris , UMR 7095, CNRS, and Sorbonne Université, 98 bis boulevard Arago, F-75014 Paris, France
- Arianna S. Long
- ORCiD
- The University of Texas at Austin , 2515 Speedway Blvd. Stop C1400, Austin, TX 78712, USA ; [email protected]
- Georgios Magdis
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen, Denmark
- Guillaume Mahler
- ORCiD
- Department of Physics, Centre for Extragalactic Astronomy, Durham University , South Road, Durham, DH1 3LE, UK; Department of Physics, Institute for Computational Cosmology, Durham University , South Road, Durham, DH1 3LE, UK
- Crystal L. Martin
- ORCiD
- Department of Physics, University of California, Santa Barbara , Santa Barbara, CA 93109, USA
- Richard Massey
- ORCiD
- Department of Physics, Centre for Extragalactic Astronomy, Durham University , South Road, Durham, DH1 3LE, UK; Department of Physics, Institute for Computational Cosmology, Durham University , South Road, Durham, DH1 3LE, UK
- Bahram Mobasher
- ORCiD
- Department of Physics and Astronomy, University of California, Riverside , 900 University Ave., Riverside, CA 92521, USA
- Louise Paquereau
- ORCiD
- Institut d’Astrophysique de Paris , UMR 7095, CNRS, and Sorbonne Université, 98 bis boulevard Arago, F-75014 Paris, France
- Alvio Renzini
- ORCiD
- INAF , Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy
- Jason Rhodes
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr., Pasadena, CA 91001, USA
- R. Michael Rich
- ORCiD
- Department of Physics and Astronomy, UCLA , PAB 430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547, USA
- Kartik Sheth
- ORCiD
- NASA Headquarters , 300 Hidden Figures Wy. SE, Washington, DC 20546, USA
- John D. Silverman
- ORCiD
- Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, Tokyo Institutes for Advanced Study, University of Tokyo , Chiba, 277-8583, Japan; Department of Astronomy, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan; Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583, Japan
- Martin Sparre
- ORCiD
- Institut für Physik und Astronomie, Universität Potsdam , Karl-Liebknecht-Str. 24/25, 14476 Golm, Germany
- Margherita Talia
- ORCiD
- University of Bologna–Department of Physics and Astronomy “Augusto Righi” (DIFA) , Via Gobetti 93/2, I-40129, Bologna, Italy; INAF , Osservatorio di Astrofisica e Scienza dello Spazio, Via Gobetti 93/3, I-40129, Bologna, Italy
- Benny Trakhtenbrot
- ORCiD
- School of Physics and Astronomy, Tel Aviv University , Tel Aviv 69978, Israel
- Francesco Valentino
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen, Denmark
- Aswin P. Vijayan
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Stephen M. Wilkins
- ORCiD
- Astronomy Centre, University of Sussex , Falmer, Brighton, BN1 9QH, UK; Institute of Space Sciences and Astronomy, University of Malta , Msida, MSD 2080, Malta
- Lilan Yang
- ORCiD
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo , Kashiwa, Chiba 277-8583, Japan
- Jorge A. Zavala
- ORCiD
- National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
- DOI
- https://doi.org/10.3847/1538-4357/ad5e6a
- Journal volume & issue
-
Vol. 973,
no. 1
p. 23
Abstract
We report the identification of 15 galaxy candidates at z ≥ 9 using the initial COSMOS-Web JWST observations over 77 arcmin ^2 through four Near Infrared Camera filters (F115W, F150W, F277W, and F444W) with an overlap with the Mid-Infrared Imager (F770W) of 8.7 arcmin ^2 . We fit the sample using several publicly available spectral energy distribution (SED) fitting and photometric redshift codes and determine their redshifts between z = 9.3 and z = 10.9 (〈 z 〉 = 10.0), UV magnitudes between M _UV = −21.2 and −19.5 (with 〈 M _UV 〉 = −20.2), and rest-frame UV slopes (〈 β 〉 = −2.4). These galaxies are, on average, more luminous than most z ≥ 9 candidates discovered by JWST so far in the literature, while exhibiting similar blue colors in their rest-frame UV. The rest-frame UV slopes derived from SED fitting are blue ( β ∼ [−2.0, −2.7]) without reaching extremely blue values as reported in other recent studies at these redshifts. The blue color is consistent with models that suggest the underlying stellar population is not yet fully enriched in metals like similarly luminous galaxies in the lower-redshift Universe. The derived stellar masses with $\langle {\mathrm{log}}_{10}($ M _⋆ / M _⊙ )〉 ≈ 8–9 are not in tension with the standard Lambda cold dark matter (ΛCDM) model, and our measurement of the volume density of such UV-luminous galaxies aligns well with previously measured values presented in the literature at z ∼ 9–10. Our sample of galaxies, although compact, is significantly resolved.
Keywords