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RECURRENCE OF THE BLUE WING ENHANCEMENTS IN THE HIGH-IONIZATION LINES OF SDSS 1004+4112A

机译:SDSS 1004 + 4112A高电离线中蓝翼增强的递归

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摘要

We present integral field spectroscopic observations of the quadruple-lensed QSO SDSS 1004+4112 taken with the fiber system INTEGRAL at the William Herschel Telescope on 2004 January 19. In 2003 May, a blueward enhancement in the high-ionization lines of SDSS 1004+4112A was detected, and then it faded. Our observations are the first to note a second event of similar characteristics less than 1 year after. Although initially attributed to microlensing, the resemblance among the spectra of both events and the absence of microlensing-induced changes in the continuum of component A are puzzling. The lack of a convincing explanation under the microlensing or intrinsic variability hypotheses makes the observed enhancements particularly relevant, calling for close monitoring of this object.
机译:我们提供2004年1月19日在William Herschel望远镜上用光纤系统INTEGRAL拍摄的四透镜QSO SDSS 1004 + 4112的积分光谱学观察结果。2003年5月,SDSS 1004 + 4112A的高电离谱线向蓝色方向增强被检测到,然后消失。我们的观察结果是第一个注意到在不到一年之后的第二次类似特征的事件。尽管起初归因于微透镜,但是两个事件的光谱之间的相似性以及在组分A的连续体中不存在由微透镜引起的变化都是令人困惑的。在微透镜或内在可变性假设下缺乏令人信服的解释,使得观察到的增强特别有意义,因此需要密切监视该物体。

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