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RELICS : Small-scale Star Formation in Lensed Galaxies at z=6-10
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- Welch, Brian (author)
- Johns Hopkins Univ, Ctr Astrophys Sci, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA.
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- Coe, Dan (author)
- Space Telescope Sci Inst STScI, 3700 San Martin Dr, Baltimore, MD 21218 USA.;Assoc Univ Res Astron AURA, European Space Agcy ESA, STScI, Baltimore, MD USA.
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- Zitrin, Adi (author)
- Bengur Univ Negev, Phys Dept, POB 653, IL-84105 Beer Sheva, Israel.
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- Johns Hopkins Univ, Ctr Astrophys Sci, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA Space Telescope Sci Inst STScI, 3700 San Martin Dr, Baltimore, MD 21218 USA.;Assoc Univ Res Astron AURA, European Space Agcy ESA, STScI, Baltimore, MD USA. (creator_code:org_t)
- 2023-01-19
- 2023
- English.
- In: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 943:1
- Journal article (peer-reviewed)
Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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- Welch, Brian
- Coe, Dan
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- Bradley, Larry
- Sharon, Keren
- Bradac, Marusa
- Rigby, Jane
- Frye, Brenda
- Fujimoto, Seiji
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