A SPECTROSCOPICALLY CONFIRMED DOUBLE SOURCE PLANE LENS SYSTEM in the HYPER SUPRIME-CAM SUBARU STRATEGIC PROGRAM

Tanaka Masayuki Tanaka, Masayuki Tanaka, Kenneth C. Wong, Anupreeta More, Arsha Dezuka, Eiichi Egami, Masamune Oguri, Sherry H. Suyu, Alessandro Sonnenfeld, Ryo Higuchi, Yutaka Komiyama, Satoshi Miyazaki, Masafusa Onoue, Shuri Oyamada, Yousuke Utsumi

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We report the serendipitous discovery of HSC J142449-005322, a double source plane lens system in the Hyper Suprime-Cam Subaru Strategic Program. We dub the system Eye of Horus. The lens galaxy is a very massive early-type galaxy with stellar mass of located at . The system exhibits two arcs/rings with clearly different colors, including several knots. We have performed spectroscopic follow-up observations of the system with FIRE on Magellan. The outer ring is confirmed at with multiple emission lines, while the inner arc and counterimage is confirmed at . This makes it the first double source plane system with spectroscopic redshifts of both sources. Interestingly, redshifts of two of the knots embedded in the outer ring are found to be offset by from the other knots, suggesting that the outer ring consists of at least two distinct components in the source plane. We perform lens modeling with two independent codes and successfully reproduce the main features of the system. However, two of the lensed sources separated by ∼0.7 arcsec cannot be reproduced by a smooth potential, and the addition of substructure to the lens potential is required to reproduce them. Higher-resolution imaging of the system will help decipher the origin of this lensing feature and potentially detect the substructure.

Original languageEnglish (US)
Article numberL19
JournalAstrophysical Journal Letters
Volume826
Issue number2
DOIs
StatePublished - Aug 1 2016

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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