Source Size Limitation from Variabilities of a Lensed Quasar

Details Source Size Limitation from Variabilities of a Lensed Quasar Source Size Limitation from Variabilities of a Lensed Quasar

1999-05-03

arxiv.org/abs/astro-ph/9905005v1

Astronomy and Astrophysics

Astrophysics

15 pages LaTeX, 3 figures, accepted to ApJ Letter. e-mail: yonehara@kusastro.kyoto-u.ac.jp

Scientific paper

10.1086/312107

In the case of gravitationally-lensed quasars, it is well-known that there is a time delay between occurrence of the intrinsic variabilities in each split image. Generally, the source of variabilities has a finite size, and there are time delays even in one image. If the origin of variabilities is widely distributed, say over $\gsim 100 pc$ as whole, variabilities between split images will not show a good correlation even though their origin is identical. Using this fact, we are able to limit the whole source size of variabilities in a quasar below the limit of direct resolution by today's observational instruments.

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