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Discovery of a fifth image of the large separation gravitationally lensed quasar SDSS J1004+4112

机译：发现大分离引力透镜类星体SDSS J1004 + 4112的第五张图像

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We report on the discovery of a fifth lensed image in the large separation lensed quasar system SDSS J1004+4112. A faint point Source located 0"2 from the center of the brightest galaxy in the lensing Cluster was detected in imaues taken with the Advanced Camera for Surveys (ACS) and the Near Infrared Carnera and Multi-Object Spectrometer (NICMOS) on the Hubble Space Telescope. The flux ratio between the point source and the brightest lensed component in the ACS image is similar to that in the NlCMOS image. The location and brightness of the point source are consistent with lens model predictions for a lensed image. We therefore conclude that the point source is likely to be a fifth lensed image of the source quasar. In addition, the NICMOS image reveals the lensed host galaxy of the source quasar, which can strongly constrain the structure of the lensing critical curves, and thereby the mass distribution of the lensing cluster.
机译：我们报告了在大分离镜头类星体系统SDSS J1004 + 4112中发现第五个镜头图像的情况。在哈勃太空望远镜上使用先进的勘测相机（ACS）和近红外迦纳和多目标光谱仪（NICMOS）拍摄的图像中，检测到了一个微弱的点光源，该光源位于镜头星团中最亮的星系中心0“ 2处。望远镜：ACS图像中点光源与最亮透镜组件之间的通量比与NlCMOS图像中的通量比相似，点光源的位置和亮度与透镜模型对透镜图像的预测一致，因此得出结论：点源很可能是源类星体的第五个透镜图像，此外，NICMOS图像还揭示了源类星体的透镜主星系，这可以极大地限制透镜临界曲线的结构，从而限制透镜的质量分布。镜头组。

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