Discovery of a Very Bright and Intrinsically Very Luminous, Strongly Lensed Lyα Emitting Galaxy at z = 2.82 in the BOSS Emission-Line Lens Survey

Research output: Contribution to journalArticle

  • Authors:
  • Rui Marques-Chaves
  • Ismael Pérez-Fournon
  • Yiping Shu
  • Paloma I. Martínez-Navajas
  • Adam S. Bolton
  • And 7 others
  • External authors:
  • Christopher S. Kochanek
  • Masamune Oguri
  • Zheng Zheng
  • Shude Mao
  • Antonio D. Montero-Dorta
  • Matthew A. Cornachione
  • Joel R. Brownstein

Abstract

We report the discovery of a very bright (r = 20.16), highly magnified, and yet intrinsically very luminous Lyα emitter (LAE) at . This system comprises four images in the observer plane with a maximum separation of and it is lensed by a massive early-type galaxy. It was initially identified in the Baryon Oscillation Spectroscopic Survey Emission-Line Lens Survey for GALaxy-Lyα EmitteR sYstems survey, and follow-up imaging and spectroscopic observations using the Gran Telescopio Canarias and William Herschel Telescope confirmed the lensing nature of this system. A lens model using a singular isothermal ellipsoid in an external shear field reproduces the main features of the system quite well, yielding an Einstein radius of 2.″95 ± 0.″10, and a total magnification factor for the LAE of 8.8 ± 0.4. This LAE is one of the brightest and most luminous galaxy-galaxy strong lenses known. We present initial imaging and spectroscopy showing the basic physical and morphological properties of this lensed system.

Bibliographical metadata

Original languageEnglish
Article numberL18
JournalAstrophysical Journal Letters
Volume834
Issue number2
DOIs
StatePublished - 10 Jan 2017