Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining Dark Matter with the Long-Term Variability of Quasars   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.

22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph