Microlensing implications for halo dark matter

Details Microlensing implications for halo dark matter Microlensing implications for halo dark matter

1997-08-26

arxiv.org/abs/astro-ph/9708235v1

Astronomy and Astrophysics

Astrophysics

3 pages, to appear in Proceedings of the 8th Marcel Grosmann Meeting on relativistic Astrophysics, Jerusalem, 22-27 June 1997

Scientific paper

The observations of microlensing events in the Large Magellanic Cloud suggest that a sizable fraction ($\sim$ 50%) of the galactic halo is in the form of MACHOs (Massive Astrophysical Compact Halo Objects) with an average mass $\sim 0.27 M_{\odot}$, assuming a standard spherical halo model. We describe a scenario in which dark clusters of MACHOs and cold molecular clouds (mainly of $H_2$) naturally form in the halo at galactocentric distances larger than 10--20 kpc.

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