2000/11/28 by The Macho collaboration, C. Alcock, R. A. Allsman +22 · 2 citations
Physics and Astronomy · #astro-ph
paper · pdf · doi:10.1086/319636
6 pages, latex with 3 postscript figures, submitted to ApJ Letters
arxiv created 2000/11/28 · arxiv updated 2009/12/01
We report on a search for long duration microlensing events towards the Large Magellanic Cloud. We find none, and therefore put limits on the contribution of high mass objects to the Galactic dark matter. At 95% confidence level we exclude objects in the mass range 0.3 solar masses to 30.0 solar masses from contributing more than 4 times 1011 solar masses to the Galactic halo. Combined with earlier results, this means that objects with masses under 30 solar masses cannot make up the entire dark matter halo if the halo is of typical size. For a typical dark halo, objects with masses under 10 solar masses contribute less than 40% of the dark matter.