Halo dark clusters of brown dwarfs and molecular clouds

Details Halo dark clusters of brown dwarfs and molecular clouds Halo dark clusters of brown dwarfs and molecular clouds

1997-01-28

arxiv.org/abs/astro-ph/9701214v1

Astronomy and Astrophysics

Astrophysics

to appear in the proceedings of the 18th Texas Symposium

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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