Two Massive, Compact, and Dust-obscured Candidate z ≃ 8 Galaxies Discovered by JWST

被引：54

作者：

Akins, Hollis B. ^{[1
]}

Casey, Caitlin M. ^{[1
,2
]}

Allen, Natalie ^{[2
,3
]}

Bagley, Micaela B. ^{[1
]}

Dickinson, Mark ^{[4
]}

Finkelstein, Steven L. ^{[1
]}

Franco, Maximilien ^{[1
]}

Harish, Santosh ^{[5
]}

Haro, Pablo Arrabal ^{[4
]}

Ilbert, Olivier ^{[6
]}

Kartaltepe, Jeyhan S. ^{[5
]}

Koekemoer, Anton M. ^{[7
]}

Liu, Daizhong ^{[8
]}

Long, Arianna S. ^{[1
]}

McCracken, Henry Joy ^{[9
,10
]}

Paquereau, Louise ^{[9
,10
]}

Papovich, Casey ^{[11
,12
]}

Pirzkal, Nor ^{[13
]}

Rhodes, Jason ^{[14
]}

Robertson, Brant E. ^{[15
]}

Shuntov, Marko ^{[2
,3
]}

Toft, Sune ^{[2
,3
]}

Yang, Guang ^{[16
,17
]}

Barro, Guillermo ^{[18
]}

Bisigello, Laura ^{[19
,20
]}

Buat, Veronique ^{[6
]}

Champagne, Jaclyn B. ^{[21
]}

Cooper, Olivia ^{[1
]}

Costantin, Luca ^{[22
]}

de la Vega, Alexander ^{[23
]}

Drakos, Nicole E. ^{[15
]}

Faisst, Andreas ^{[24
]}

Fontana, Adriano ^{[25
]}

Fujimoto, Seiji ^{[1
]}

Gillman, Steven ^{[2
,26
]}

Gomez-Guijarro, Carlos ^{[27
]}

Gozaliasl, Ghassem ^{[28
]}

Hathi, Nimish P. ^{[7
]}

Hayward, Christopher C. ^{[29
]}

Hirschmann, Michaela ^{[30
,31
]}

Holwerda, Benne W. ^{[32
]}

Jin, Shuowen ^{[2
,26
]}

Kocevski, Dale D. ^{[33
]}

Kokorev, Vasily ^{[16
]}

Lambrides, Erini ^{[34
]}

Lucas, Ray A. ^{[7
]}

Magdis, Georgios E. ^{[2
,3
,26
]}

Magnelli, Benjamin ^{[27
]}

McKinney, Jed ^{[1
]}

Mobasher, Bahram ^{[23
]}

机构：

[1] Univ Texas Austin, Dept Astron, 2515 Speedway Blvd Stop C1400, Austin, TX 78712 USA

[2] Cosm Dawn Ctr DAWN, Copenhagen, Denmark

[3] Univ Copenhagen, Niels Bohr Inst, Jagtvej 128, DK-2200 Copenhagen, Denmark

[4] NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA

[5] Rochester Inst Technol, Sch Phys & Astron, Lab Multiwavelength Astrophys, 84 Lomb Mem Dr, Rochester, NY 14623 USA

[6] Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France

[7] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[8] Max Planck Inst Extraterr Phys MPE, Giessenbachstr 1, D-85748 Garching, Germany

[9] CNRS, Inst Astrophys Paris, UMR 7095, 98 Bis Blvd Arago, F-75014 Paris, France

[10] Sorbonne Univ, 98 Bis Blvd Arago, F-75014 Paris, France

[11] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[12] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamental, College Stn, TX 77843 USA

[13] ES AURA Space Telescope Sci Inst, Baltimore, MD USA

[14] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91001 USA

[15] Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA

[16] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[17] SRON Netherlands Inst Space Res, Postbus 800, NL-9700 AV Groningen, Netherlands

[18] Univ Pacific, Dept Phys, Stockton, CA 90340 USA

[19] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[20] Univ Padua, Dipartimento Fis & Astron G Galilei, Via Marzolo 8, I-35131 Padua, Italy

[21] Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA

[22] Ctr Astrobiol CAB CSIC INTA, Ctra Ajalvir km 4, E-28850 Torrejon De Ardoz, Madrid, Spain

[23] Univ Calif Riverside, Dept Phys & Astron, 900 Univ Ave, Riverside, CA 92521 USA

[24] Caltech IPAC, 1200 East Calif Blvd, Pasadena, CA 91125 USA

[25] INAF, Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy

[26] Tech Univ Denmark, DTU Space, Elektrovej 327, DK-2800 Lyngby, Denmark

[27] Univ Paris Cite, Univ Paris Saclay, CEA, CNRS,AIM, F-91191 Gif Sur Yvette, France

[28] Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland

[29] Flatiron Inst, Ctr Computat Astrophys, 162 Fifth Ave, New York, NY 10010 USA

[30] Ecole Polytech Fed Lausanne, Inst Phys, Lab Galaxy Evolut & Spectral Modelling, Observ Sauverny, Chemin Pegasi 51, CH-1290 Versoix, Switzerland

[31] INAF, Osservatorio Astron Trieste, Via Tiepolo 11, I-34131 Trieste, Italy

[32] Univ Louisville, Phys & Astron Dept, Louisville, KY 40292 USA

[33] Colby Coll, Dept Phys & Astron, Waterville, ME 04901 USA

[34] NASA Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[35] UCLA, Dept Phys & Astron, PAB 430 Portola Plaza,Box 951547, Los Angeles, CA 90095 USA

[36] Univ Bologna, Dept Phys & Astron Augusto Righi DIFA, Via Gobetti 93-2, I-40129 Bologna, Italy

[37] INAF, Osservatorio Astrofis & Sci Spazio, Via Gobetti 93-3, I-40129 Bologna, Italy

[38] Yale Univ, Phys Dept, POB 208120, New Haven, CT 06520 USA

[39] Yale Univ, Yale Ctr Astron & Astrophys, POB 208120, New Haven, CT 06520 USA

[40] European Southern Observ, Karl-Schwarzschild Str 2, D-85748 Garching, Germany

[41] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[42] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

来源：

ASTROPHYSICAL JOURNAL | 2023年 / 956卷 / 01期

基金：

美国国家科学基金会;

关键词：

SPECTRAL ENERGY-DISTRIBUTIONS; STELLAR POPULATION SYNTHESIS; SPACE-TELESCOPE OBSERVATIONS; STAR-FORMATION HISTORY; HIGH-REDSHIFT GALAXIES; BROAD-BAND PHOTOMETRY; LYMAN-BREAK GALAXIES; HIGH-Z EXPLORATION; LUMINOSITY FUNCTION; EMISSION-LINES;

D O I：

10.3847/1538-4357/acef21

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 (similar to 2.5 mag) and detection in MIRI/F770W (similar to 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 less than or similar to 200 pc) and highly obscured (A(V) similar to 1.5-2.5) and, at our best-fit redshift estimates, likely have strong [O III]+H beta emission contributing to their 4.4 mu m photometry. We estimate stellar masses of similar to 10(10) M-circle dot for both sources; by virtue of detection in MIRI at 7.7 mu 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 sigma) 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 similar to 10(12) L-circle dot. These two galaxies, if confirmed at z similar to 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.

引用

页数：17

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