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arXiv 0910.3669astro-ph.CO
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微透镜证据表明,1型类星体是面对面观察的

Microlensing Evidence That A Type 1 Quasar Is Viewed Face On

Shawn Poindexter, Christopher S. Kochanek

摘要:

通过对四像引力透镜Q2237+0305 11年OGLE V波段测光的微透镜分析,我们测量到吸积盘的倾角i为cos i > 0.66,置信度为68%。在95%置信度下排除了非常接近(cosi < 0.39)的解决方案。我们测量了吸积盘的V带半径,即温度与监测带光子发射相匹配的半径,R_V = 5.8(+3.8)(-2.3)× 10^15 cm,假设是一个简单的薄盘模型,并包括其倾斜度的不确定性。对于T正比于R^-3/4的薄圆盘温度分布,圆盘的投影辐射面积仍然太大,与观测到的通量不一致。透镜星系的运动方向(特有速度)和盘的取向之间没有很强的相关性。

英文摘要:

Using a microlensing analysis of 11-years of OGLE V-band photometry of the four image gravitational lens Q2237+0305, we measure the inclination i of the accretion disk to be cos i > 0.66 at 68% confidence. Very edge on (cos i < 0.39) solutions are ruled out at 95% confidence. We measure the V-band radius of the accretion disk, defined by the radius where the temperature matches the monitoring band photon emission, to be R_V = 5.8 (+3.8) (-2.3) x 10^15 cm assuming a simple thin disk model and including the uncertainties in its inclination. The projected radiating area of the disk remains too large to be consistent with the observed flux for a T proportional to R^-3/4 thin disk temperature profile. There is no strong correlation between the direction of motion (peculiar velocity) of the lens galaxy and the orientation of the disk.

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