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Microlensed light curves for thin accretion disks around Schwarzschild and Kerr black holes
Jaroszynski, M.; Wambsganss, J.; Paczynski, B.
AA(Warsaw University Observatory, Poland; Princeton University Observatory, NJ), AB(Princeton University Observatory, NJ; Max-Planck-Institut für Physik und Astrophysik, Garching bei München, Germany), AC(Princeton University Observatory, NJ)
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 396, no. 2, Sept. 10, 1992, p. L65-L68. Research supported by Ministry of Education of Poland. (ApJL Homepage)
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NASA/STI Keywords:
Accretion Disks, Black Holes (Astronomy), Gravitational Lenses, Light Curve, Schwarzschild Metric, Astronomical Models, Luminosity, Quasars, Relativistic Effects
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Surface brightness maps for thin accretion disks around Schwarzschild and Kerr black holes are presented. These disks are a few times smaller than those used by Rauch and Blandford (1991), and some of the present models are slightly less luminous than theirs. Example of microlensed light curves are calculated by convolving these accretion disk maps with the magnification patterns obtained from microlensing calculations. The light curves exhibit eventlike variations with amplitudes and time scales comparable to those observed in QSO 2237 + 0305. It is concluded that thin thermal accretion disk models are not in contradiction with the observed microlens-induced variations of QSO 2237 + 0305.

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