Adaptive optics observations of the gravitationally lensed quasar SDSS J1405+0959
Adaptive optics observations of the gravitationally lensed quasar SDSS J1405+0959
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引力透镜类星体的自适应光学观测 SDSS J1405 0959
DOI：
10.1093/mnras/stu1621
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发表时间：
2014
影响因子：
4.8
通讯作者：
Shin Oya
中科院分区：
文献类型：
--
作者：
Cristian E. Rusu;Masamune Oguri;Yosuke Minowa;Masanori Iye;Anupreeta More;Naohisa Inada;Shin Oya
我们展示了斯巴鲁望远镜多波段自适应光学对由两个透镜星系产生的复杂引力透镜类星体 SDSS J1405+0959 的观测结果。这些观测揭示了显着增强的形态细节，导致在距次级透镜星系 0.26 角秒处发现了另一个物体，以及位于两个透镜星系之间的三个共线团块。这个新物体很可能是第三个类星体图像，尽管不能完全排除它是星系的可能性。如果通过未来的观测得到证实，它将是第一个由两个星系透镜产生的三图像透镜类星体。在这两种情况下，我们基于引力透镜模型和光度红移表明，共线团块代表类星体宿主星系一部分的合并图像，放大系数约为 15-20，具体取决于模型。
We present the result of Subaru Telescope multiband adaptive optics observations of the complex gravitationally lensed quasar SDSS J1405+0959, which is produced by two lensing galaxies. These observations reveal dramatically enhanced morphological detail, leading to the discovery of an additional object 0.26 arcsec from the secondary lensing galaxy, as well as three collinear clumps located in between the two lensing galaxies. The new object is likely to be the third quasar image, although the possibility that it is a galaxy cannot be entirely excluded. If confirmed via future observations, it would be the first three-image lensed quasar produced by two galaxy lenses. In either case, we show based on gravitational lensing models and photometric redshift that the collinear clumps represent merging images of a portion of the quasar host galaxy, with a magnification factor of ∼ 15-20, depending on the model.