Gravitational microlensing as a method of detecting disk dark matter and faint disk stars

Details Gravitational microlensing as a method of detecting disk dark matter and faint disk stars Gravitational microlensing as a method of detecting disk dark matter and faint disk stars

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372l..79g&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 372, May 10, 1991, p. L79-L82.

Astronomy and Astrophysics

Astrophysics

121

Dark Matter, Galactic Structure, Gravitational Lenses, Stellar Mass, Binary Stars, Optical Thickness

Scientific paper

Gravitational microlensing of stars in the Galactic bulge is proposed as a method of probing the mass density of disk objects in the 0.001 to 0.1 solar mass range. A substantial rate is found if disk dark matter of this form exists, and even without any dark matter, a significant microlensing rate is found, owing to the faint low-mass disk stars which are known to exist. Such a search would provide new information on the disk dark matter question, probe the low-end stellar mass function, and also search for halo dark matter, all with rates comparable to those expected for the ongoing LMC microlensing halo dark matter searches.

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