SDSS J133401.39+331534.3 : A New Subarcsecond Gravitationally Lensed Quasar
SDSS J133401.39+331534.3 : A New Subarcsecond Gravitationally Lensed Quasar
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SDSS J133401.39 331534.3：一个新的亚弧秒引力透镜类星体
DOI：
10.1088/0004-637x/738/1/30
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Rusu Cristian Eduard
中科院分区：
文献类型：
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作者：
M.Amenomori;et al.;Kenji Handa;白井淳平;寺島雄一・上笹尚哉・粟木久光・久保田あや・上田佳宏;Rusu Cristian Eduard
类星体SDSS J133401。39+ 331534.3在z= 2.426被发现是一个双像引力透镜类星体，图像分离为0 farcs 833。该天体首先在斯隆数字巡天类星体透镜搜索中被确定为透镜类星体候选者，然后在斯巴鲁和夏威夷大学2.2米望远镜的后续观测中被确认为透镜系统。根据类星体光谱中的吸收线以及星系的颜色，我们估计透镜星系的红移为0.557。特别是，我们观察的系统与斯巴鲁望远镜AO188自适应光学与激光引导星星，为了获得准确的天体测量，这很好地证明了有用的激光引导星星自适应光学成像研究强透镜系统。我们用改进的天体测量学建立的质量模型表明，附近一个距离透镜星系104“的明亮星系很可能会影响透镜的势能。
The quasar SDSS J133401. 39+ 331534.3 at z= 2.426 is found to be a two-image gravitationally lensed quasar with an image separation of 0 farcs 833. The object is first identified as a lensed quasar candidate in the Sloan Digital Sky Survey Quasar Lens Search, and then confirmed as a lensed system from follow-up observations at the Subaru and University of Hawaii 2.2 m telescopes. We estimate the redshift of the lensing galaxy to be 0.557 based on absorption lines in the quasar spectra as well as the color of the galaxy. In particular, we observe the system with the Subaru Telescope AO188 adaptive optics with a laser guide star, in order to derive accurate astrometry, which well demonstrates the usefulness of the laser guide star adaptive optics imaging for studying strong lens systems. Our mass modeling with improved astrometry implies that a nearby bright galaxy∼ 4''apart from the lensing galaxy is likely to affect the lens potential.