TY - JOUR
T1 - RELICS
T2 - Small-scale Star Formation in Lensed Galaxies at z = 6-10
AU - Welch, Brian
AU - Coe, Dan
AU - Zitrin, Adi
AU - Diego, Jose M.
AU - Windhorst, Rogier
AU - Mandelker, Nir
AU - Vanzella, Eros
AU - Ravindranath, Swara
AU - Zackrisson, Erik
AU - Florian, Michael
AU - Bradley, Larry
AU - Sharon, Keren
AU - Bradač, Maruša
AU - Rigby, Jane
AU - Frye, Brenda
AU - Fujimoto, Seiji
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - 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 ∼ 6 (WHL 0137-zD1, dubbed the Sunrise Arc), the brightest known lensed galaxy at z phot ∼ 6 (MACS 0308-zD1), and the only spatially resolved galaxy currently known at z phot ∼ 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 ∼ 30 pc clump with a star formation rate (SFR) of ∼3 M ⊙ yr−1, giving it an SFR surface density of ΣSFR ∼ 103 M ⊙ 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.
AB - 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 ∼ 6 (WHL 0137-zD1, dubbed the Sunrise Arc), the brightest known lensed galaxy at z phot ∼ 6 (MACS 0308-zD1), and the only spatially resolved galaxy currently known at z phot ∼ 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 ∼ 30 pc clump with a star formation rate (SFR) of ∼3 M ⊙ yr−1, giving it an SFR surface density of ΣSFR ∼ 103 M ⊙ 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.
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U2 - 10.3847/1538-4357/aca8a8
DO - 10.3847/1538-4357/aca8a8
M3 - Article
AN - SCOPUS:85146868292
SN - 0004-637X
VL - 943
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 2
ER -