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20 April 2024 |
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Survey of Gravitationally-lensed Objects in HSC Imaging (SuGOHI). IV. Lensed quasar search in the HSC survey | | James H. H. Chan
; Sherry H. Suyu
; Alessandro Sonnenfeld
; Anton T. Jaelani
; Anupreeta More
; Atsunori Yonehara
; Yuriko Kubota
; Jean Coupon
; Chien-Hsiu Lee
; Masamune Oguri
; Cristian E. Rusu
; Kenneth C. Wong
; | | Date: |
6 Nov 2019 | | Abstract: | Strong gravitationally lensed quasars provide powerful means to study galaxy
evolution and cosmology. We use Chitah to hunt for new lens systems in the
Hyper Suprime$-$Cam Subaru Strategic Program (HSC SSP) S16A. We present 46 lens
candidates, of which 3 are previously known. Including 2 additional lenses
found by YattaLens, we obtain X-shooter spectra of 6 promising candidates for
lens confirmation and redshift measurements. We report new spectroscopic
redshift measurements for both the lens and source galaxies in 4 lens systems.
We apply the lens modeling software Glee to model our 6 X-shooter lenses
uniformly. Through our analysis of the HSC images, we find that
HSCJ022622$-$042522, HSCJ115252$+$004733, and HSCJ141136$-$010216 have
point-like lensed images, and that the lens light distribution is well aligned
with mass distribution within 6 deg. Thanks to the X-shooter spectra, we
estimate fluxes on the Baldwin- Phillips-Terlevich (BPT) diagram, and find that
HSCJ022622$-$042522 has a probable quasar source, based on the upper limit of
the Nii flux intensity. We also measure the FWHM of Ly$alpha$ emission of
HSCJ141136$-$010216 to be $sim$254 km/s, showing that it is a probable
Lyman-$alpha$ emitter. | | Source: | arXiv, 1911.2587 | | Services: | Forum | Review | PDF | Favorites | |
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