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arXiv 1107.0982astro-ph.CO
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双重成像类星体Q0957 +561中的一个新的微透镜事件

A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561

Laura J. Hainline, Christopher W. Morgan, J. N. Beach, C. S. Kochanek, Hugh C. Harris, T. Tilleman, Ross Fadely, Emilio E. Falco, T. X. Le

摘要:

我们提出的引力透镜类星体Q 0957 +561的紫外/光学微透镜的证据。我们结合新的测量,从我们的光学监测活动在美国海军天文台,旗杆(USNO)与测量文献中发现,时间延迟校正的r-波段通量比m_A - m_B增加了约0.1个数量级在2005年秋季开始的五年内。我们用Monte Carlo微透镜分析方法对复合光变曲线进行了分析,得到了光学吸积盘尺寸的测量值log {(r_s/cm)[cos(i)/0.5]^{1/2}} = 16.2^{+0.5}-0.6},与类星体吸积盘尺寸-黑洞质量关系相一致。

英文摘要:

We present evidence for ultraviolet/optical microlensing in the gravitationally lensed quasar Q0957+561. We combine new measurements from our optical monitoring campaign at the United States Naval Observatory, Flagstaff (USNO) with measurements from the literature and find that the time-delay-corrected r-band flux ratio m_A - m_B has increased by ~0.1 magnitudes over a period of five years beginning in the fall of 2005. We apply our Monte Carlo microlensing analysis procedure to the composite light curves, obtaining a measurement of the optical accretion disk size, log {(r_s/cm)[cos(i)/0.5]^{1/2}} = 16.2^{+0.5}_{-0.6}, that is consistent with the quasar accretion disk size - black hole mass relation.

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