Caustic crossing in the gravitational lens Q2237+0305

被引：0
|
作者：
V. N. Shalyapin
机构：
[1] National Academy of Sciences of Ukraine,Institute of Radio Astronomy
来源：
Astronomy Letters | 2001年 / 27卷
关键词：
quasars; gravitational lenses; accretion disks;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The monitoring of the gravitational lens Q2237+0305 carried out by the OGLE group during 1997–2000 is analyzed. The significant light amplifications in the C and A quasar components with maxima in mid-and late 1999, respectively, are interpreted as the crossing of microlens caustics by the source. A constraint on the emitting-region size R≤1015 cm has been obtained from the light-curve shape by assuming a power-law quasar brightness distribution (r2+R2)−p. To estimate the exponent p∼1.2 requires refining the standard model for the quasar continuum formation in an optically thick accretion disk with p=1.5.
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页码：150 / 155
页数：5
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