A rapid microlensing event in the Q0957+561A, B gravitational lens system

被引：19
|
作者：
Colley, WN
Schild, RE
机构：
[1] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
ASTROPHYSICAL JOURNAL | 2003年 / 594卷 / 01期
关键词：
galaxies : halos; gravitational lensing; quasars : individual (Q957+561);
D O I：
10.1086/376832
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We reanalyze brightness data sampled intensively over five nights at two epochs separated by the quasar lens time delay to examine the nature of the observed microlensing. We find strong evidence for a microlensing event with an amplitude of 1% and a timescale of 12 hr. The existence of such rapid microlensing, albeit at low amplitude, imposes constraints on the nature of the quasar and of the baryonic dark matter.
引用
收藏
页码：97 / 100
页数：4
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