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X-Ray Microlensing of Bright Quasars

Published online by Cambridge University Press:  05 March 2013

Shin Mineshige ,
Atsunori Yonehara  and
Rohta Takahashi
Shin Mineshige*
Affiliation:
Department of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Atsunori Yonehara
Affiliation:
Department of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Rohta Takahashi
Affiliation:
Department of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
*
minesige@kusastro.kyoto-u.ac.jp
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Abstract

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We calculate the expected microlens light curves to see what aspects of flow structures can be extracted by microlensing.We specifically pick up a disk-corona model as a model for bright quasars.We then expect distinct behaviour in the soft and hard X-ray microlens variations. Since soft X-ray emission is produced by Compton up-scattering of soft (optical-UV) photons from the innermost part of the disk, while hard X-ray radiation is via bremsstrahlung within the corona of a large volume, the model calculations predict more rapid soft X-ray changes than hard X-ray ones. Further, bright spots (or blobs) on the disk will produce humps in the microlens light curves. Future microlens observations will constrain such emission processes, thereby probing accretion flow structure.

Keywords

accretion, accretion disksblack holephysicsgalaxies: activequasars: general
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 2 , 2001 , pp. 186 - 188
Copyright
Copyright © Astronomical Society of Australia 2001

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