Statistics – Computation
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..412g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 412-421.
Statistics
Computation
270
Computational Astrophysics, Dark Matter, Galactic Structure, Gravitational Lenses, Halos, Astronomical Models, Interstellar Matter, Magellanic Clouds, Milky Way Galaxy, Sun
Scientific paper
The dark matter of the Galaxy may well consist of Jupiters, brown dwarfs, or the remnants of an early generation of stars. In 1986, Paczynski suggested that a population of such objects could be detected by watching for microlensing of stars in the LMC. Using a more realistic model of the halo density and velocity structure this paper recalculates the microlensing optical depth, the microlensing event rate, and the average duration of an event, correcting an error, but finding rough agreement with Paczynski's estimates. Also calculated is the distribution of microlensing events as a function of their duration and amplitude, finding that photometric measurements more frequent than the average event duration are needed to detect a substantial fraction of the events.
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