Turning AGN Microlensing From a Curiosity Into a Tool

Details Turning AGN Microlensing From a Curiosity Into a Tool Turning AGN Microlensing From a Curiosity Into a Tool

2006-09-05

arxiv.org/abs/astro-ph/0609112v3

Astronomy and Astrophysics

Astrophysics

To appear in Statistical Challenges in Modern Astronomy IV, 2007, G. J. Babu and E. D. Feigelson (eds.), San Francisco:Astron.

Scientific paper

Microlensing of gravitationally lensed quasars by the stars in the foreground lens galaxy can be used to probe the nature of dark matter, to determine the mean stellar mass in the lens galaxy, and to measure the internal structure of quasar accretion disks. Until recently, little progress has been made toward using microlensing for these purposes because of the difficulty in obtaining the necessary data and the lack of good analysis methods. In the last few years, both problems have been solved. In particular, Bayesian analysis methods provide a general approach to measuring quantities of physical interest and their uncertainties from microlensing light curves. We discuss the data and the analysis methods and show preliminary results for all three astrophysical applications.

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