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Chan, James H. H.; Suyu, Sherry H.; Sonnenfeld, Alessandro; Jaelani, Anton T.; More, Anupreeta; Yonehara, Atsunori; Kubota, Yuriko; Coupon, Jean; Lee, Chien-Hsiu; Oguri, Masamune; Rusu, Cristian E.; Wong, Kenneth C.
Astronomy and astrophysics (Berlin), 04/2020, Letnik: 636Journal Article
Strong gravitationally lensed quasars provide a powerful means to study galaxy evolution and cosmology. We use C HITAH , which is an algorithm used to hunt for new lens systems, particularly lensed quasars, in the Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) S16A. We present 46 lens candidates, of which 3 are previously known. We select four high-grade candidates from C HITAH for spectroscopic follow-up observations, and include two additional lenses found by Y ATTA L ENS , an algorithm used to classify lensed galaxies. We obtain X-shooter spectra of these six promising candidates for lens confirmation and redshift measurements. We report new spectroscopic redshift measurements for both the lens and source galaxies in four lens systems. We apply the lens modeling software G LEE to model our six 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 the lens mass distribution within 6 deg. We estimate the fluxes of the lensed source emission lines using X-shooter spectra, and use line ratio as a diagnostic on the Baldwin-Phillips-Terlevich (BPT) diagram. As a result, we find that HSCJ022622−042522 has a probable quasar source based on the upper limit of the N II flux intensity. We also measure the FWHM of Ly α emission of HSCJ141136−010216 to be ∼233 km s −1 , showing that it is a probable Lyman- α emitter.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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