Journal article

RELICS: A Candidate z similar to 10 Galaxy Strongly Lensed into a Spatially Resolved Arc

Brett Salmon, Dan Coe, Larry Bradley, Marusa Bradac, Victoria Strait, Rachel Paterno-Mahler, Kuang-Han Huang, Pascal A Oesch, Adi Zitrin, Ana Acebron, Nathalia Cibirka, Shotaro Kikuchihara, undefined Masamune, Gabriel B Brammer, Keren Sharon, Michele Trenti, Roberto J Avila, Sara Ogaz, Felipe Andrade-Santos, Daniela Carrasco Show all



The most distant galaxies known are at z ∼ 10-11, observed 400-500 Myr after the Big Bang. The few z ∼ 10-11 candidates discovered to date have been exceptionally small, barely resolved, if at all, by the Hubble Space Telescope. Here we present the discovery of SPT0615-JD1, a fortuitous z ∼ 10 (z phot = ) galaxy candidate stretched into an arc over ∼2.″5 by the effects of strong gravitational lensing. Discovered in the Reionization Lensing Cluster Survey (RELICS) Hubble Treasury program and companion S-RELICS Spitzer program, this candidate has a lensed H-band magnitude of 24.6 ± 0.1 AB mag. With a magnification of μ ∼ 4-7 estimated from our lens models, the delensed intrinsic magnitude is 2..

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University of Melbourne Researchers


Awarded by AURA under NASA

Awarded by ACS under NASA

Awarded by U.S. Department of Energy by LLNL

Funding Acknowledgements

This Letter uses observations from NASA/ESA HST. STScI is operated by AURA under NASA contract NAS 5-26555, ACS under NASA contract NAS 5-32864, and Spitzer by JPL. These observations are associated with program GO-14096 and archival data are associated with programs GO-12757 and GO-12477. Some data were obtained from MAST. The RELICS archive at MAST can be obtained at doi: 10.17909/T9SP45. This work was performed under the auspices of the U.S. Department of Energy by LLNL under contract DE-AC52-07NA27344. F.A.-S. acknowledges support from Chandra grant G03-14131X.