TY - JOUR
T1 - A SPECTROSCOPICALLY CONFIRMED DOUBLE SOURCE PLANE LENS SYSTEM in the HYPER SUPRIME-CAM SUBARU STRATEGIC PROGRAM
AU - Masayuki Tanaka, Tanaka
AU - Tanaka, Masayuki
AU - Wong, Kenneth C.
AU - More, Anupreeta
AU - Dezuka, Arsha
AU - Egami, Eiichi
AU - Oguri, Masamune
AU - Suyu, Sherry H.
AU - Sonnenfeld, Alessandro
AU - Higuchi, Ryo
AU - Komiyama, Yutaka
AU - Miyazaki, Satoshi
AU - Onoue, Masafusa
AU - Oyamada, Shuri
AU - Utsumi, Yousuke
N1 - Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved..
PY - 2016/8/1
Y1 - 2016/8/1
N2 - 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.
AB - 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.
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U2 - 10.3847/2041-8205/826/2/L19
DO - 10.3847/2041-8205/826/2/L19
M3 - Article
AN - SCOPUS:84982286590
SN - 2041-8205
VL - 826
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L19
ER -