2009/12/31 by Issha Kayo, Naohisa Inada, Masamune Oguri +5
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Lens (geology) #Optics #Physics #Quasar #Redshift #Sky #astro-ph.CO
paper · pdf · doi:10.1088/0004-6256/139/4/1614
published as Astron.J.139:1614-1621,2010 · 22 pages, 4 figures
openalex publication_date 2010/03/11 · arxiv created 2010/03/15 · arxiv updated 2014/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the discovery and confirmation of eight new two-image lensed quasars by the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. The lenses are SDSS J0904+1512 (image separation θ = 1 13, source redshift z s = 1.826), SDSS J1054+2733 (θ = 1 27, z s = 1.452), SDSS J1055+4628 (θ = 1 15, z s = 1.249), SDSS J1131+1915 (θ = 1 46, z s = 2.915), SDSS J1304+2001 (θ = 1 87, z s = 2.175), SDSS J1349+1227 (θ = 3 00, z s = 1.722), SDSS J1455+1447 (θ = 1 73, z s = 1.424), and SDSS J1620+1203 (θ = 2 77, z s = 1.158). Three of them, SDSS J1055+4628, SDSS J1455+1447, and SDSS J1620+1203, satisfy the criteria for constructing our statistical sample for studying the cosmological model. Based on galactic absorption lines of the lens galaxies, we also derive lens redshifts of z l = 0.398 and z l = 0.513 for SDSS J1620+1203 and the previously discovered lens SDSS J0746+4403, respectively.