Microlensing Towards the Galactic Bulge and Galactic Dark Matter

Details Microlensing Towards the Galactic Bulge and Galactic Dark Matter Microlensing Towards the Galactic Bulge and Galactic Dark Matter

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996nuphs..51..146g&link_type=abstract

Nuclear Physics B Proceedings Supplements, v. 51, p. 146-151.

Physics

Nuclear Physics

Scientific paper

Extensive modeling of the Galactic disk and bulge is used to study the implications of the observed microlensing events towards the bulge. We constrain models to fit both the microlensing data and more traditional constraints such as rotation curve measurements, limits on the disk surface density, and escape velocity from the Galaxy. We find that even if the Galactic bulge has a bar-like configuration, substantial dark matter must exist in either a heavy disk or a massive bar or both. Disentanglement of the bar and disk contributions requires mapping of the optical depth across the Galactic center. We discuss the range over which such mapping would be useful.

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