Constraining Dark Matter with the Long-Term Variability of Quasars

Details Constraining Dark Matter with the Long-Term Variability of Quasars Constraining Dark Matter with the Long-Term Variability of Quasars

2002-06-14

arxiv.org/abs/astro-ph/0206247v1

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures, to appear in the proceedings from the conference "Lighthouses of the Universe: The Most Luminous Celestial

Scientific paper

10.1007/10856495_87

By comparing the results of numerical microlensing simulations to the observed long-term variability of quasars, strong upper limits on the cosmological density of compact objects in the mass range 0.01 to 0.0001 solar masses may be imposed. Using recently developed methods to better approximate the amplification of large sources, we investigate in what way the constraints are affected by assumptions concerning the size of the optical continuum-emitting region of quasars in the currently favored (Omega_M=0.3, Omega_Lambda=0.7) cosmology.

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