The Astrophysical Journal (Jan 2023)
Two Massive, Compact, and Dust-obscured Candidate z ≃ 8 Galaxies Discovered by JWST
- Hollis B. Akins,
- Caitlin M. Casey,
- Natalie Allen,
- Micaela B. Bagley,
- Mark Dickinson,
- Steven L. Finkelstein,
- Maximilien Franco,
- Santosh Harish,
- Pablo Arrabal Haro,
- Olivier Ilbert,
- Jeyhan S. Kartaltepe,
- Anton M. Koekemoer,
- Daizhong Liu,
- Arianna S. Long,
- Henry Joy McCracken,
- Louise Paquereau,
- Casey Papovich,
- Nor Pirzkal,
- Jason Rhodes,
- Brant E. Robertson,
- Marko Shuntov,
- Sune Toft,
- Guang Yang,
- Guillermo Barro,
- Laura Bisigello,
- Véronique Buat,
- Jaclyn B. Champagne,
- Olivia Cooper,
- Luca Costantin,
- Alexander de la Vega,
- Nicole E. Drakos,
- Andreas Faisst,
- Adriano Fontana,
- Seiji Fujimoto,
- Steven Gillman,
- Carlos Gómez-Guijarro,
- Ghassem Gozaliasl,
- Nimish P. Hathi,
- Christopher C. Hayward,
- Michaela Hirschmann,
- Benne W. Holwerda,
- Shuowen Jin,
- Dale D. Kocevski,
- Vasily Kokorev,
- Erini Lambrides,
- Ray A. Lucas,
- Georgios E. Magdis,
- Benjamin Magnelli,
- Jed McKinney,
- Bahram Mobasher,
- Pablo G. Pérez-González,
- R. Michael Rich,
- Lise-Marie Seillé,
- Margherita Talia,
- C. Megan Urry,
- Francesco Valentino,
- Katherine E. Whitaker,
- L. Y. Aaron Yung,
- Jorge Zavala,
- the COSMOS-Web and CEERS teams
Affiliations
- Hollis B. Akins
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Caitlin M. Casey
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]; Cosmic Dawn Center (DAWN) , Denmark
- Natalie Allen
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, Denmark
- Micaela B. Bagley
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Mark Dickinson
- ORCiD
- NSF’s National Optical-Infrared Astronomy Research Laboratory , 950 North Cherry Avenue, Tucson, AZ 85719, USA
- Steven L. Finkelstein
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Maximilien Franco
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Santosh Harish
- ORCiD
- Laboratory for Multiwavelength Astrophysics, School of Physics and Astronomy, Rochester Institute of Technology , 84 Lomb Memorial Drive, Rochester, NY 14623, USA
- Pablo Arrabal Haro
- ORCiD
- NSF’s National Optical-Infrared Astronomy Research Laboratory , 950 North Cherry Avenue, Tucson, AZ 85719, USA
- Olivier Ilbert
- ORCiD
- Aix Marseille Université , CNRS, CNES, LAM, Marseille, France
- Jeyhan S. Kartaltepe
- ORCiD
- Laboratory for Multiwavelength Astrophysics, School of Physics and Astronomy, Rochester Institute of Technology , 84 Lomb Memorial Drive, Rochester, NY 14623, USA
- Anton M. Koekemoer
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Daizhong Liu
- ORCiD
- Max-Planck-Institut für Extraterrestrische Physik (MPE) , Giessenbachstr. 1, D-85748 Garching, Germany
- Arianna S. Long
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Henry Joy McCracken
- ORCiD
- Institut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne Université , 98 bis boulevard Arago, F-75014 Paris, France
- Louise Paquereau
- ORCiD
- Institut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne Université , 98 bis boulevard Arago, F-75014 Paris, France
- Casey Papovich
- ORCiD
- Department of Physics and Astronomy, Texas A&M University , College Station, TX 77843-4242, USA; George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University , College Station, TX 77843-4242, USA
- Nor Pirzkal
- ORCiD
- ESA/AURA Space Telescope Science Institute , USA
- Jason Rhodes
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91001, USA
- Brant E. Robertson
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
- Marko Shuntov
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, Denmark
- Sune Toft
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, Denmark
- Guang Yang
- ORCiD
- Kapteyn Astronomical Institute, University of Groningen , P.O. Box 800, 9700 AV Groningen, The Netherlands; SRON Netherlands Institute for Space Research , Postbus 800, 9700 AV Groningen, The Netherlands
- Guillermo Barro
- ORCiD
- Department of Physics, University of the Pacific , Stockton, CA 90340, USA
- Laura Bisigello
- ORCiD
- INAF–Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, I-35122, Padova, Italy; Dipartimento di Fisica e Astronomia “G.Galilei,” Universitá di Padova , Via Marzolo 8, I-35131 Padova, Italy
- Véronique Buat
- ORCiD
- Aix Marseille Université , CNRS, CNES, LAM, Marseille, France
- Jaclyn B. Champagne
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721, USA
- Olivia Cooper
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Luca Costantin
- ORCiD
- Centro de Astrobiología (CAB/CSIC-INTA) , Ctra. de Ajalvir km 4, Torrejón de Ardoz, E-28850 Madrid, Spain
- Alexander de la Vega
- ORCiD
- Department of Physics and Astronomy, University of California Riverside , 900 University Avenue, Riverside, CA 92521, USA
- Nicole E. Drakos
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
- Andreas Faisst
- ORCiD
- Caltech/IPAC , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Adriano Fontana
- ORCiD
- INAF , Osservatorio Astronomico di Roma, via di Frascati 33, I-00078 Monte Porzio Catone, Italy
- Seiji Fujimoto
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Steven Gillman
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Carlos Gómez-Guijarro
- ORCiD
- Université Paris-Saclay , Université Paris Cité, CEA, CNRS, AIM, F-91191, Gif-sur-Yvette, France
- Ghassem Gozaliasl
- ORCiD
- Department of Physics, University of Helsinki , P.O. Box 64, FI-00014 Helsinki, Finland
- Nimish P. Hathi
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Christopher C. Hayward
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Michaela Hirschmann
- ORCiD
- Institute for Physics , Laboratory for Galaxy Evolution and Spectral Modelling, Ecole Polytechnique Federale de Lausanne, Observatoire de Sauverny, Chemin Pegasi 51, 1290 Versoix, Switzerland; INAF , Osservatorio Astronomico di Trieste, Via Tiepolo 11, I-34131 Trieste, Italy
- Benne W. Holwerda
- ORCiD
- Physics & Astronomy Department, University of Louisville , Louisville, KY 40292, USA
- Shuowen Jin
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Dale D. Kocevski
- ORCiD
- Department of Physics and Astronomy, Colby College , Waterville, ME 04901, USA
- Vasily Kokorev
- ORCiD
- Kapteyn Astronomical Institute, University of Groningen , P.O. Box 800, 9700 AV Groningen, The Netherlands
- Erini Lambrides
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Ray A. Lucas
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Georgios E. Magdis
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200, Copenhagen N, Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Benjamin Magnelli
- ORCiD
- Université Paris-Saclay , Université Paris Cité, CEA, CNRS, AIM, F-91191, Gif-sur-Yvette, France
- Jed McKinney
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway Boulevard Stop C1400, Austin, TX 78712, USA ; [email protected]
- Bahram Mobasher
- ORCiD
- Department of Physics and Astronomy, University of California Riverside , 900 University Avenue, Riverside, CA 92521, USA
- Pablo G. Pérez-González
- ORCiD
- Centro de Astrobiología (CAB/CSIC-INTA) , Ctra. de Ajalvir km 4, Torrejón de Ardoz, E-28850 Madrid, Spain
- R. Michael Rich
- ORCiD
- Department of Physics and Astronomy, UCLA , PAB 430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547, USA
- Lise-Marie Seillé
- ORCiD
- Aix Marseille Université , CNRS, CNES, LAM, Marseille, France
- 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
- C. Megan Urry
- ORCiD
- Physics Department and Yale Center for Astronomy & Astrophysics, Yale University , P.O. Box 208120, New Haven, CT 06520, USA
- Francesco Valentino
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; European Southern Observatory , Karl-Schwarzschild-Strasse 2, D-85748, Garching bei München, Germany
- Katherine E. Whitaker
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USA
- L. Y. Aaron Yung
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Jorge Zavala
- ORCiD
- National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
- the COSMOS-Web and CEERS teams
- DOI
- https://doi.org/10.3847/1538-4357/acef21
- Journal volume & issue
-
Vol. 956,
no. 1
p. 61
Abstract
We present a search for extremely red, dust-obscured, z > 7 galaxies with JWST/NIRCam+MIRI imaging over the first 20 arcmin ^2 of publicly available Cycle 1 data from the COSMOS-Web, CEERS, and PRIMER surveys. Based on their red color in F277W−F444W (∼2.5 mag) and detection in MIRI/F770W (∼25 mag), we identify two galaxies, COS-z8M1 and CEERS-z7M1, that have best-fit photometric redshifts of $z={8.4}_{-0.4}^{+0.3}$ and ${7.6}_{-0.1}^{+0.1}$ , respectively. We perform spectral energy distribution fitting with a variety of codes (including bagpipes , prospector , beagle , and cigale ) and find a >95% probability that these indeed lie at z > 7. Both sources are compact ( R _eff ≲ 200 pc) and highly obscured ( A _V ∼ 1.5–2.5) and, at our best-fit redshift estimates, likely have strong [O iii ]+H β emission contributing to their 4.4 μ m photometry. We estimate stellar masses of ∼10 ^10 M _⊙ for both sources; by virtue of detection in MIRI at 7.7 μ m, these measurements are robust to the inclusion of bright emission lines, for example, from an active galactic nucleus. We identify a marginal (2.9 σ ) Atacama Large Millimeter/submillimeter Array detection at 2 mm within 0.″5 of COS-z8M1, which, if real, would suggest a remarkably high IR luminosity of ∼10 ^12 L _⊙ . These two galaxies, if confirmed at z ∼ 8, would be extreme in their stellar and dust masses and may be representative of a substantial population of highly dust-obscured galaxies at cosmic dawn.
Keywords
