Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang

被引：56

作者：

Adamo, Angela ^{[1
,2
]}

Bradley, Larry D. ^{[3
]}

Vanzella, Eros ^{[4
]}

Claeyssens, Adelaide ^{[1
,2
]}

Welch, Brian ^{[5
,6
]}

Diego, Jose M. ^{[7
]}

Mahler, Guillaume ^{[8
,9
,10
]}

Oguri, Masamune ^{[11
,12
]}

Sharon, Keren ^{[13
]}

Abdurro'uf ^{[3
,14
]}

Hsiao, Tiger Yu-Yang ^{[3
,14
]}

Xu, Xinfeng ^{[15
,16
]}

Messa, Matteo ^{[4
]}

Lassen, Augusto E. ^{[1
,2
,17
]}

Zackrisson, Erik ^{[18
,19
]}

Brammer, Gabriel ^{[20
,21
]}

Coe, Dan ^{[3
,14
,22
]}

Kokorev, Vasily ^{[23
]}

Ricotti, Massimo ^{[5
]}

Zitrin, Adi ^{[24
]}

Fujimoto, Seiji ^{[25
]}

Inoue, Akio K. ^{[26
,27
]}

Resseguier, Tom ^{[14
]}

Rigby, Jane R. ^{[6
]}

Jimenez-Teja, Yolanda ^{[28
,29
]}

Windhorst, Rogier A. ^{[30
]}

Hashimoto, Takuya ^{[31
,32
]}

Tamura, Yoichi ^{[33
]}

机构：

[1] Stockholm Univ, Astron Dept, Stockholm, Sweden

[2] Oskar Klein Ctr, Stockholm, Sweden

[3] Space Telescope Sci Inst STScI, Baltimore, MD USA

[4] INAF, Osservatorio Astrofis & Sci Spazio Bologna, Bologna, Italy

[5] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[6] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Code 660, Greenbelt, MD USA

[7] CSIC UC, Inst Fis Cantabria, Santander, Spain

[8] STAR Inst, Liege, Belgium

[9] Univ Durham, Ctr Extragalact Astron, Durham, England

[10] Univ Durham, Inst Computat Cosmol, Durham, England

[11] Chiba Univ, Ctr Frontier Sci, Chiba, Japan

[12] Chiba Univ, Grad Sch Sci, Dept Phys, Chiba, Japan

[13] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[14] Johns Hopkins Univ, Ctr Astrophys Sci, Dept Phys & Astron, Baltimore, MD 21218 USA

[15] Northwestern Univ, Dept Phys & Astron, Evanston, IL USA

[16] Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys CI, Evanston, IL USA

[17] Universe Fed Rio Grande do Sul, Dept Astron, Inst Fis, Porto Alegre, RS, Brazil

[18] Uppsala Univ, Dept Phys & Astron, Observat Astrophys, Uppsala, Sweden

[19] Swedish Coll Adv Study, Uppsala, Sweden

[20] Cosm Dawn Ctr DAWN, Copenhagen, Denmark

[21] Univ Copenhagen, Niels Bohr Inst, Copenhagen, Denmark

[22] European Space Agcy ESA, STScI, Assoc Univ Res Astron AURA, Baltimore, MD USA

[23] Univ Groningen, Kapteyn Astron Inst, Groningen, Netherlands

[24] Ben Gurion Univ Negev, Dept Phys, Beer Sheva, Israel

[25] Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA

[26] Waseda Univ, Fac Sci & Engn, Sch Adv Sci & Engn, Dept Phys, Tokyo, Japan

[27] Waseda Univ, Fac Sci & Engn, Waseda Res Inst Sci & Engn, Tokyo, Japan

[28] CSIC, Inst Astrofis Andalucia, Granada, Spain

[29] MCTI, Observatorio Nacl, Rio De Janeiro, Brazil

[30] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA

[31] Univ Tsukuba, Fac Pure & Appl Sci, Div Phys, Tsukuba, Ibaraki, Japan

[32] Univ Tsukuba, Tomonaga Ctr Hist Universe TCHoU, Tsukuba, Ibaraki, Japan

[33] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi, Japan

来源：

NATURE | 2024年 / 632卷 / 8025期

基金：

瑞典研究理事会; 西班牙国家研究理事会; 以色列科学基金会; 欧盟地平线“2020”; 美国国家科学基金会;

关键词：

GLOBULAR-CLUSTERS; MASS; I;

D O I：

10.1038/s41586-024-07703-7

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift z approximate to 10.2 (ref.(1)). However, it is an intrinsically ultraviolet faint galaxy, in the range of those now thought to drive the reionization of the Universe(2-4). Hitherto the smallest features resolved in a galaxy at a comparable redshift are between a few hundreds and a few tens of parsecs (pc)(5,6). Here we report JWST observations of the Cosmic Gems. The light of the galaxy is resolved into five star clusters located in a region smaller than 70pc. They exhibit minimal dust attenuation and low metallicity, ages younger than 50Myr and intrinsic masses of about 10(6)M(circle dot). Their lensing-corrected sizes are approximately 1pc, resulting in stellar surface densities near 10(5)M(circle dot)pc(-2), three orders of magnitude higher than typical young star clusters in the local Universe(7). Despite the uncertainties inherent to the lensing model, they are consistent with being gravitationally bound stellar systems, that is, proto-globular clusters. We conclude that star cluster formation and feedback likely contributed to shaping the properties of galaxies during the epoch of reionization. JWST observations of the Cosmic Gems arc resolve the light of an infant galaxy into five gravitationally bound star clusters located in a region smaller than 70pc.

引用

页码：513 / 516

页数：4

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