How to find MACHOs in the Virgo Cluster

Details How to find MACHOs in the Virgo Cluster How to find MACHOs in the Virgo Cluster

1998-06-12

arxiv.org/abs/astro-ph/9806176v1

NewAstron.Rev.42:115-119,1998

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, to appear in New Astronomy

Scientific paper

10.1016/S1387-6473(98)00031-1

We discuss the feasibility of finding extra-galactic MACHOs by monitoring quasars behind the Virgo cluster of galaxies. We show that with only a modest observing programme one could detect several MACHOs in the mass range 1 X 10^{-5} to 2 X 10^{-2} solar masses if they make a significant contribution to the mass of Virgo. The contamination by events from cosmologically distributed MACHOs is estimated and is negligible if either the MACHO mass is greater than about 10^{-4} solar masses or the quasar radius is greater than about 3 X 10^{15} cm.

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