RELICS: A Candidate z similar to 10 Galaxy Strongly Lensed into a Spatially Resolved Arc
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Author
Salmon, Brett
Coe, Dan
Bradley, Larry
Bradač, Marusa
Strait, Victoria
Paterno-Mahler, Rachel
Huang, Kuang-Han
Oesch, Pascal A.
Zitrin, A.

Acebron, Ana
Cibirka, Nathália
Kikuchihara, Shotaro
Oguri, Masamune

Brammer, Gabriel B.
Sharon, Keren
Trenti, Michele
Avila, Roberto J.
Ogaz, Sara
Andrade-Santos, Felipe
Carrasco, Daniela
Cerny, Catherine
Dawson, William
Frye, Brenda L.
Hoag, Austin
Jones, Christine
Mainali, Ramesh

Ouchi, Masami
Rodney, Steven A.
Stark, Daniel
Umetsu, Keiichi
Affiliation
Univ Arizona, Steward ObservIssue Date
2018-09-01Keywords
galaxies: clusters: generalgalaxies: evolution
galaxies: high-redshift
gravitational lensing: strong
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IOP PUBLISHING LTDCitation
Brett Salmon et al 2018 ApJL 864 L22Journal
ASTROPHYSICAL JOURNAL LETTERSRights
© 2018. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
The most distant galaxies known are at z similar to 10-11, observed 400-500 Myr after the Big Bang. The few z similar to 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 similar to 10 (z(phot) = 9.9(0.6)(+0.8)) galaxy candidate stretched into an arc over similar to 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 mu similar to 4-7 estimated from our lens models, the delensed intrinsic magnitude is 26.7 +/- 0.1 AB mag, and the half-light radius is r(e) < 0.8 kpc, both consistent with other z > 9 candidates. The inferred stellar mass (log[M-star/M-circle dot = 8.3(-0.2)(+0.3)) and star formation rate (log[SFR/M-circle dot yr(-1)] 1.1(-0.4)(+0.5)) indicate that this candidate is a typical star-forming galaxy on the z > 6 SFR-M-star relation. We note that three independent lens models predict two counter images, at least one of which should be of a similar magnitude to the arc, but these counter images are not yet detected. Counter images would not be expected if the arc were at lower redshift. The relatively large physical size could be due to a merger or accretion event, while the unprecedented lensed size of this z similar to 10 candidate offers the potential for ALMA and the James. Webb. Space. Telescope to study the geometric and kinematic properties of a galaxy observed 500 Myr after the Big Bang.ISSN
2041-8213Version
Final published versionSponsors
AURA under NASA [NAS 5-26555]; ACS under NASA [NAS 5-32864]; JPL; U.S. Department of Energy by LLNL [DE-AC52-07NA27344]; [GO-14096]; [GO-12757]; [GO-12477]; [G03-14131X]Additional Links
http://stacks.iop.org/2041-8205/864/i=1/a=L22?key=crossref.d2a0a898bcd7b8f00854b4e37ac0588cae974a485f413a2113503eed53cd6c53
10.3847/2041-8213/aadc10