The Brown Dwarf Mass Function from Pixel Microlensing

Details The Brown Dwarf Mass Function from Pixel Microlensing The Brown Dwarf Mass Function from Pixel Microlensing

2000-12-14

arxiv.org/abs/astro-ph/0012325v2

Mon.Not.Roy.Astron.Soc. 323 (2001) L31

Astronomy and Astrophysics

Astrophysics

5 pages, 7 figures, using mn.sty, revised version

Scientific paper

10.1046/j.1365-8711.2001.04482.x

We argue that gravitational microlensing is a feasible technique for measuring the mass function of brown dwarf stars in distant galaxies. Microlensing surveys of the bulge of M31, and of M87 in the Virgo cluster, may provide enough events to differentiate the behaviour of the mass function of lenses below the hydrogen burning limit (though we find that M87 is a more favourable target). Such objects may provide a significant supply of baryonic dark matter, an interesting possibility for the study of galactic dynamics. Furthermore, these systems have different metallicities than the solar neighbourhood, which may affect the mass function. These considerations are relevant in the context of star formation studies.

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