Does the LMC Halo Contribute Significantly to the MACHO Events?

Details Does the LMC Halo Contribute Significantly to the MACHO Events? Does the LMC Halo Contribute Significantly to the MACHO Events?

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mgm..conf.1697s&link_type=abstract

"THE ELEVENTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation an

Computer Science

Scientific paper

Our main purpose is to determine the lens population to which the events found by the MACHO collaboration towards the LMC may belong. We show that only a fraction of the events have characteristics that match those expected for lenses belonging to the MACHO population of the Galactic halo. This suggests that this component cannot explain all the candidates. Accordingly, we challenge the view that the dark matter halo fraction of both the Galaxy and the LMC halos are equal, and indeed we show that, for a MACHO mass in the range 0.1-0.3 M&sun;. the LMC halo fraction can be significantly larger than the Milky Way's. In this perspective, our main conclusion is that up to about half of the observed events could be attributed to the LMC MACHO dark matter halo.

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