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首页> 外文期刊>The Astrophysical journal >Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey
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Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey

机译:斯隆数字天空调查中的两个新的引力透镜双类星体

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We report the discoveries of the two-image gravitationally lensed quasars SDSS J074653.03+440351.3 and SDSS J140624.82+612640.9, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403, which will be included in our lens sample for statistics and cosmology, has a source redshift of zs = 2.00, an estimated lens redshift of zl ~ 0.3, and an image separation of 1.08''. SDSS J1406+6126 has a source redshift of zs = 2.13, a spectroscopically measured lens redshift of zl = 0.27, and an image separation of 1.98''. We find that the two quasar images of SDSS J1406+6126 have different intervening Mg II absorption strengths, which are suggestive of large variations of absorbers on kiloparsec scales. The positions and fluxes of both lensed quasar systems are easily reproduced by simple mass models with reasonable parameter values. These objects bring to 18 the number of lensed quasars that have been discovered from the SDSS data.
机译:我们报告了从斯隆数字天空测量(SDSS)中选择的两幅图像的重力透镜类星体SDSS J074653.03 + 440351.3和SDSS J140624.82 + 612640.9的发现。 SDSS J0746 + 4403将包含在我们的镜头样本中用于统计和宇宙学,其源红移为zs = 2.00,估计的镜头红移为zl〜0.3,并且图像分离为1.08英寸。 SDSS J1406 + 6126的光源红移为zs = 2.13,光谱测定的镜头红移为zl = 0.27,图像分离度为1.98英寸。我们发现,SDSS J1406 + 6126的两个类星体图像具有不同的中间Mg II吸收强度,这表明吸收剂在千帕斯卡范围内存在较大差异。两个带透镜的类星体系统的位置和通量都可以通过具有合理参数值的简单质量模型轻松地重现。这些物体使从SDSS数据中发现的带镜类星体的数量增加到18个。

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