Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/pasa/18_2/yonehara/paper/index.html
Дата изменения: Fri Apr 8 08:57:13 2016
Дата индексирования: Sun Apr 10 16:46:21 2016
Кодировка:
Поисковые слова: п п п п п п п р п р п р п р п
Source size measurement from observed quasar microlensing

Source size measurement from observed quasar microlensing

Atsunori Yonehara
, PASA, 18 (2), in press.
Next Section: Introduction
Contents Page: Volume 18, Number 2

Source size measurement from observed quasar microlensing

Atsunori Yonehara 1, 2

1 Department of Astronomy, Kyoto University, Sakyo-ku, Kyoto, 606-8502, JAPAN

2 Research Fellow of the Japan Society for the Promotion of Science

Abstract:

Recently, the OGLE team have reported a clear quasar microlensing signal in Q2237+0305. I have analyzed the microlens event of ``image C'' by using their finely and densely sampled light curves. From light-curve fitting, I unambiguously set the source size of $\le 0.98$ Einstein Ring radius as a conservative limit. This limit corresponds to

$2000 {\rm ~AU}$, if I adopt

$M_{\rm lens} \sim 0.1M_{\odot}$ obtained by a recent statistical study of the mean mass of the lens object. This gives clear evidence for the existence of an accretion disk in the central region of the quasar.

Keywords:accretion, accretion disks -- galaxies: active -- gravitational lensing -- quasars: individuals (Q2237+0305)



Welcome... About Electronic PASA... Instructions to Authors
ASA Home Page... CSIRO Publishing PASA
Browse Articles HOME Search Articles
б© Copyright Astronomical Society of Australia 1997
ASKAP
Public