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Astronomy Reports

, Volume 46, Issue 8, pp 626–633 | Cite as

Reconstruction of the strip brightness distribution in a quasar accretion disk from gravitational microlensing data

  • M. B. Bogdanov
  • A. M. Cherepashchuk
Article

Abstract

A technique is proposed for the successive reconstruction of the branches of the strip brightness distribution for a quasar accretion disk via the analysis of observations of high magnification flux events in the multiple quasar images produced by a gravitational lens. The distribution branches are searched for on compact sets of nonnegative, monotonically nonincreasing, convex downward functions. The results of numerical simulations and application of the technique to real observations show that the solution obtained is stable against random noise. Analysis of the light curve of a high magnification event in image C of the gravitational lens QSO 2237+0305 observed by the OGLE group in summer 1999 has yielded the form of the strip brightness distribution in the accretion disk of the lensed quasar. The results are consistent with the hypothesis that the quasar disk was scanned by a fold caustic. The form of the strip distribution is consistent with the expected appearance of an accretion disk rotating around a supermassive black hole.

Keywords

Black Hole Light Curve Random Noise Accretion Disk Gravitational Lens 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK "Nauka/Interperiodica" 2002

Authors and Affiliations

  • M. B. Bogdanov
    • 1
    • 2
  • A. M. Cherepashchuk
    • 1
    • 2
  1. 1.Chernyshevskii State UniversitySaratovRussia
  2. 2.Sternberg Astronomical InstituteMoscowRussia

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