JWST, ALMA, and Keck Spectroscopic Constraints on the UV Luminosity Functions at z ∼ 7-14: Clumpiness and Compactness of the Brightest Galaxies in the Early Universe

被引：2

作者：

Harikane, Yuichi ^{[1
]}

Inoue, Akio K. ^{[2
,3
]}

Ellis, Richard S. ^{[4
]}

Ouchi, Masami ^{[1
,5
,6
]}

Nakazato, Yurina ^{[7
]}

Yoshida, Naoki ^{[7
]}

Ono, Yoshiaki ^{[1
]}

Sun, Fengwu ^{[8
,9
]}

Sato, Riku A. ^{[2
]}

Ferrami, Giovanni ^{[10
,11
]}

Fujimoto, Seiji ^{[12
]}

Kashikawa, Nobunari ^{[13
,14
]}

Mcleod, Derek J. ^{[15
]}

Perez-Gonzalez, Pablo G. ^{[16
]}

Sawicki, Marcin ^{[17
,18
]}

Sugahara, Yuma ^{[2
,3
]}

Xu, Yi ^{[1
,13
]}

Yamanaka, Satoshi ^{[19
]}

Carnall, Adam C. ^{[15
]}

Cullen, Fergus ^{[15
]}

Dunlop, James S. ^{[15
]}

Egami, Eiichi ^{[8
]}

Grogin, Norman ^{[20
]}

Isobe, Yuki ^{[3
]}

Koekemoer, Anton M. ^{[20
]}

Laporte, Nicolas ^{[21
]}

Lee, Chien-Hsiu ^{[22
]}

Magee, Dan ^{[23
]}

Matsuo, Hiroshi ^{[5
,24
]}

Matsuoka, Yoshiki ^{[25
]}

Mawatari, Ken ^{[3
]}

Nakajima, Kimihiko ^{[5
]}

Nakane, Minami ^{[1
,7
]}

Tamura, Yoichi ^{[26
]}

Umeda, Hiroya ^{[1
,7
]}

Yanagisawa, Hiroto ^{[1
,7
]}

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan

[2] Waseda Univ, Sch Adv Sci & Engn, Fac Sci & Engn, Dept Phys, 3-4-1 Okubo, Tokyo, Tokyo 1698555, Japan

[3] Waseda Univ, Waseda Res Inst Sci & Engn, Fac Sci & Engn, 3-4-1 Okubo, Tokyo, Tokyo 1698555, Japan

[4] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

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

[6] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[7] Univ Tokyo, Grad Sch Sci, Dept Phys, 7-3-1 Hongo Bunkyo, Tokyo 1130033, Japan

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

[9] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[10] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[11] ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Stromlo, Australia

[12] Univ Texas Austin, Dept Astron, Austin, TX USA

[13] Univ Tokyo, Grad Sch Sci, Dept Astron, 7-3-1 Hongo Bunkyo, Tokyo 1130033, Japan

[14] Univ Tokyo, Res Ctr Early Universe, 7-3-1 Hongo Bunkyo-ku, Tokyo 1130033, Japan

[15] Univ Edinburgh, Inst Astron, SUPA, Royal Observ, Edinburgh EH9 3HJ, Scotland

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

[17] St Marys Univ, Dept Astron & Phys, 923 Robie St, Halifax, NS B3H 3C3, Canada

[18] St Marys Univ, Inst Comp Astrophys, 923 Robie St, Halifax, NS B3H 3C3, Canada

[19] Natl Inst Technol, Toba Coll, Gen Educ Dept, 1-1 Ikegami Cho, Toba, Mie 5178501, Japan

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

[21] Aix Marseille Univ, CNRS, CNES, LAM Lab Astrophys Marseille,UMR 7326, F-13388 Marseille, France

[22] McDonald Observ, Hobby Eberly Telescope, 32 Mt Fowlkes, Ft Davis, TX 79734 USA

[23] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO, Lick Observ, Santa Cruz, CA 95064 USA

[24] SOKENDAI, Grad Univ Adv Studies, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[25] Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, Japan

[26] Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Nagoya 4648602, Japan

来源：

ASTROPHYSICAL JOURNAL | 2025年 / 980卷 / 01期

基金：

日本学术振兴会;

关键词：

HIGH-REDSHIFT GALAXIES; STAR-FORMING GALAXY; EPOCH SIMULATIONS FLARES; INITIAL MASS FUNCTION; HALF-MILLION DROPOUTS; LY-ALPHA-EMISSION; 158; MU-M; PHYSICAL-PROPERTIES; REIONIZATION EPOCH; QUIESCENT GALAXIES;

D O I：

10.3847/1538-4357/ad9b2c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the number densities and physical properties of the bright galaxies spectroscopically confirmed at z similar to 7-14. Our sample is composed of 60 galaxies at z(spec )similar to 7-14, including recently confirmed galaxies at z(spec )= 12.34-14.18 with JWST, as well as new confirmations at z(spec) = 6.583-7.643 with -24 < M-UV < -21 mag using ALMA and Keck. Our JWST/NIRSpec observations have also revealed that very bright galaxy candidates at z similar to 10-13 identified from ground-based telescope images before JWST are passive galaxies at z similar to 3-4, emphasizing the necessity of strict screening and spectroscopy in the selection of the brightest galaxies at z > 10. The UV luminosity functions derived from these spectroscopic results are consistent with a double power-law function, showing tensions with theoretical models at the bright end. To understand the origin of the overabundance of bright galaxies, we investigate their morphologies using JWST/NIRCam high-resolution images obtained in various surveys, including PRIMER and COSMOS-Web. We find that similar to 70% of the bright galaxies at z similar to 7 exhibit clumpy morphologies with multiple subcomponents, suggesting merger-induced starburst activity, which is consistent with SED fitting results showing bursty star formation histories. At z greater than or similar to 10, bright galaxies are classified into two types of galaxies: extended ones with weak high-ionization emission lines, and compact ones with strong high-ionization lines including N iv]lambda 1486, indicating that at least two different processes (e.g., merger-induced starburst and compact star formation/AGN) are shaping the physical properties of the brightest galaxies at z greater than or similar to 10 and are responsible for their overabundance.

引用

页数：26

共 1 条

[1] Pure Spectroscopic Constraints on UV Luminosity Functions and Cosmic Star Formation History from 25 Galaxies at zspec=8.61-13.20 Confirmed with JWST/NIRSpec
Harikane, Yuichi
Nakajima, Kimihiko
Ouchi, Masami
Umeda, Hiroya
Isobe, Yuki
Ono, Yoshiaki
Xu, Yi
Zhang, Yechi
ASTROPHYSICAL JOURNAL, 2024, 960 (01):

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