A core in a star-forming disc as evidence of inside-out growth in the early Universe

被引：5

作者：

Baker, William M. ^{[1
,2
]}

Tacchella, Sandro ^{[1
,2
]}

Johnson, Benjamin D. ^{[3
]}

Nelson, Erica ^{[4
]}

Suess, Katherine A. ^{[5
,6
,7
]}

D'Eugenio, Francesco ^{[1
,2
]}

Curti, Mirko ^{[1
,2
,8
]}

de Graaff, Anna ^{[9
]}

Ji, Zhiyuan ^{[10
]}

Maiolino, Roberto ^{[1
,2
,11
]}

Robertson, Brant ^{[5
]}

Scholtz, Jan ^{[1
,2
]}

Alberts, Stacey ^{[10
]}

Arribas, Santiago ^{[12
]}

Boyett, Kristan ^{[13
,14
]}

Bunker, Andrew J. ^{[15
]}

Carniani, Stefano ^{[16
]}

Charlot, Stephane ^{[17
]}

Chen, Zuyi ^{[10
]}

Chevallard, Jacopo ^{[15
]}

Curtis-Lake, Emma ^{[18
]}

Danhaive, A. Lola ^{[1
,2
]}

DeCoursey, Christa ^{[10
]}

Egami, Eiichi ^{[10
]}

Eisenstein, Daniel J. ^{[3
]}

Endsley, Ryan ^{[19
]}

Hausen, Ryan ^{[20
]}

Helton, Jakob M. ^{[10
]}

Kumari, Nimisha ^{[21
]}

Looser, Tobias J. ^{[1
,2
]}

Maseda, Michael V. ^{[22
]}

Puskas, David ^{[1
,2
]}

Rieke, Marcia ^{[10
]}

Sandles, Lester ^{[1
,2
]}

Sun, Fengwu ^{[10
]}

Ubler, Hannah ^{[1
,2
]}

Williams, Christina C. ^{[23
]}

Willmer, Christopher N. A. ^{[10
]}

Witstok, Joris ^{[1
,2
]}

机构：

[1] Univ Cambridge, Kavli Inst Cosmol, Cambridge, England

[2] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge, England

[3] Ctr Astrophys Harvard & Smithsonian, Cambridge, MA USA

[4] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO USA

[5] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA USA

[6] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA USA

[7] Stanford Univ, Dept Phys, Stanford, CA USA

[8] European Southern Observ, Garching, Germany

[9] Max Planck Inst Astron, Heidelberg, Germany

[10] Univ Arizona, Steward Observ, Tucson, AZ USA

[11] UCL, Dept Phys & Astron, London, England

[12] CSIC INTA, Ctr Astrobiol CAB, Madrid, Spain

[13] Univ Melbourne, Sch Phys, Parkville, Vic, Australia

[14] ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Melbourne, Vic, Australia

[15] Univ Oxford, Dept Phys, Oxford, England

[16] Scuola Normale Super Pisa, Pisa, Italy

[17] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, Paris, France

[18] Univ Hertfordshire, Ctr Astrophys Res, Dept Phys Astron & Math, Hatfield, England

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

[20] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD USA

[21] AURA European Space Agcy, Space Telescope Sci Inst, Baltimore, MD USA

[22] Univ Wisconsin Madison, Dept Astron, Madison, WI USA

[23] NSFs Natl Opt Infrared Astron Res Lab, Tucson, AZ USA

来源：

NATURE ASTRONOMY | 2025年 / 9卷 / 01期

基金：

美国国家科学基金会; 英国科学技术设施理事会; 欧洲研究理事会; 澳大利亚研究理事会;

关键词：

HIGH-Z GALAXIES; STELLAR POPULATION; PHYSICAL-PROPERTIES; MASS-METALLICITY; MAIN-SEQUENCE; PROFILES; FEEDBACK; EVOLUTION; DENSITY; IMPACT;

D O I：

10.1038/s41550-024-02384-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The physical processes that establish the morphological evolution and the structural diversity of galaxies are key unknowns in extragalactic astrophysics. Here we report the finding of the morphologically mature galaxy JADES-GS+53.18343-27.79097, which existed within the first 700 million years of the Universe's history. This star-forming galaxy with a stellar mass of 400 million solar masses consists of three components: a highly compact core with a half-light radius of less than 100 pc, an actively star-forming disc with a radius of about 400 pc and a star-forming clump, all of which show distinctive star-formation histories. The central stellar mass density of this galaxy is within a factor of 2 of the most massive present-day ellipticals, while being globally 1,000 times less massive. The radial profile of the specific star-formation rate is rising towards the outskirts. This evidence suggests a detection of the inside-out growth of a galaxy as a proto-bulge and a star-forming disc in the epoch of reionization. Evidence is found for a distant galaxy growing inside-out within the first 700 million years of the Universe. The galaxy has a dense central core comparable in mass density to local massive ellipticals, and an extended star-forming disc.

引用

页码：141 / 154

页数：16

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