RELICS: Small-scale Star Formation in Lensed Galaxies at z=6-10

被引：16

作者：

Welch, Brian ^{[1
]}

Coe, Dan ^{[2
,3
]}

Zitrin, Adi ^{[4
]}

Diego, Jose M. M. ^{[5
]}

Windhorst, Rogier ^{[6
]}

Mandelker, Nir ^{[7
]}

Vanzella, Eros ^{[8
]}

Ravindranath, Swara ^{[2
]}

Zackrisson, Erik ^{[9
]}

Florian, Michael ^{[10
]}

Bradley, Larry ^{[2
,13
]}

Sharon, Keren ^{[11
]}

Bradac, Marusa ^{[12
,13
]}

Rigby, Jane ^{[14
]}

Frye, Brenda ^{[10
]}

Fujimoto, Seiji ^{[15
,16
,17
]}

机构：

[1] Johns Hopkins Univ, Ctr Astrophys Sci, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA

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

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

[4] Ben Gurion Univ Negev, Phys Dept, POB 653, IL-84105 Beer Sheva, Israel

[5] Inst Fis Cantabria CS UC, Avda Castros s-n, E-39005 Santander, Spain

[6] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[7] Hebrew Univ Jerusalem, Racah Inst Phys, Ctr Astrophys & Planetary Sci, IL-91904 Jerusalem, Israel

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

[9] Uppsala Univ, Dept Phys & Astron, Observat Astrophys, Box 516, SE-75120 Uppsala, Sweden

[10] Univ Arizona, Dept Astron Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA

[11] Univ Michigan, Dept Astron, 1085 South Univ Ave, Ann Arbor, MI 48109 USA

[12] Univ Ljubljana, Dept Math & Phys, Jadranska ul 19, SI-1000 Ljubljana, Slovenia

[13] Univ Calif Davis, Dept Phys & Astron, 1 Shields Ave, Davis, CA 95616 USA

[14] NASA Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA

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

[16] Cosm Dawn Ctr DAWN, Copenhagen, Denmark

[17] Univ Copenhagen, Niels Bohr Inst, Jagtvej 128, Copenhagen, Denmark

来源：

ASTROPHYSICAL JOURNAL | 2023年 / 943卷 / 01期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

STRONG-LENSING ANALYSIS; ULTRA DEEP FIELD; HIGH-REDSHIFT; GIANT CLUMPS; RESOLVED SPECTROSCOPY; STELLAR POPULATIONS; GLOBULAR-CLUSTERS; FORMING CLUMPS; MASS; EVOLUTION;

D O I：

10.3847/1538-4357/aca8a8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Detailed observations of star-forming galaxies at high redshift are critical to understanding the formation and evolution of the earliest galaxies. Gravitational lensing provides an important boost, allowing observations at physical scales unreachable in unlensed galaxies. We present three lensed galaxies from the RELICS survey at z (phot) = 6-10, including the most highly magnified galaxy at z (phot) similar to 6 (WHL 0137-zD1, dubbed the Sunrise Arc), the brightest known lensed galaxy at z (phot) similar to 6 (MACS 0308-zD1), and the only spatially resolved galaxy currently known at z (phot) similar to 10 (SPT 0615-JD). The Sunrise Arc contains seven star-forming clumps with delensed radii as small as 3 pc, the smallest spatial scales yet observed in a z > 6 galaxy, while SPT 0615-JD contains features measuring a few tens of parsecs. MACS 0308-zD1 contains an r similar to 30 pc clump with a star formation rate (SFR) of similar to 3 M (circle dot) yr(-1), giving it an SFR surface density of sigma(SFR) similar to 10(3) M (circle dot) yr(-1) kpc(-2). These galaxies provide a unique window into small-scale star formation during the epoch of reionization. They will be excellent targets for future observations with JWST, including one approved program targeting the Sunrise Arc.

引用

页数：12

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