Recent Developments in Gravitational Microlensing and the Latest MACHO Results: Microlensing Towards the Galactic Bulge
Abstract
We review recent gravitational microlensing results from the EROS, MACHO, and OGLE collaborations, and present some details of the very latest MACHO results toward the Galactic Bulge. The MACHO collaboration has now discovered in excess of 40 microlensing events toward the Galactic Bulge during the 1993 observing season. A preliminary analysis of this data suggests a much higher microlensing optical depth than predicted by standard galactic models suggesting that these models will have to be revised. This may have important implications for the structure of the Galaxy and its dark halo. Also shown are MACHO data of the first microlensing event ever detected substantially before peak amplification, the first detection of parallax effects in a microlensing event, and the first caustic crossing to be resolved in a microlensing event.
Keywords
Cite
@article{arxiv.astro-ph/9411114,
title = {Recent Developments in Gravitational Microlensing and the Latest MACHO Results: Microlensing Towards the Galactic Bulge},
author = {D. P. Bennett and C. Alcock and R. A. Allsman and T. S. Axelrod and K. H. Cook and K. C. Freeman and K. Griest and S. L. Marshall and S. Perlmutter and B. A. Peterson and M. R. Pratt and P. J. Quinn and A. W. Rodgers and C. W. Stubbs and W. Sutherland},
journal= {arXiv preprint arXiv:astro-ph/9411114},
year = {2009}
}
Comments
14 pages, 10 Figures which are included with the epsf package. Available via WWW: http://meteor.anu.edu.au. To appear in the Proceedings of the 5th Annual October Astrophysics Conference in Maryland: DARK MATTER