Login | STScI Home | HubbleSite | Copyright, Content Use, and Policies
STScI Webcast

2018 Hot Sci @ STScI

RELICS and a Candidate Spatially Resolved Arc at z ~ 10

Presented by: Brett Salmon (Space Telescope Science Institute)
Category: Science Colloquia   Duration: 30 minutes   Broadcast date: June 27, 2018
  • Bookmark/Share

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. In this talk I will present the discovery of SPT0615-JD, a fortuitous z~10 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 and Spitzer program, this candidate is bright (H~24.7 AB mag) and with a lensing magnification of 4-7 and shear. The unprecedented lensed size of this z~10 candidate offers the potential for the James Webb Space Telescope to study the geometric and kinematic properties of a galaxy observed 500 Myr after the Big Bang. I will also present the sample of bright, lensed galaxy candidates at z>6 found in RELICS that include other rare high-z arcs.