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6.12. Microlensing and dynamics of the Galactic bulge

The importance of being earnest

Published online by Cambridge University Press:  25 May 2016

H.S. Zhao
H.S. Zhao*
Affiliation:
Leiden Observatory, Niels Bohrweg 2, 2333 CA, Leiden, The Netherlands

Abstract

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Microlensing (μ—lensing) towards the bulge started out as a unique technique of detecting dark objects in the Galactic disc (brown dwarfs) by measuring a rare transient brightening of one star among millions of stars in the Galactic bulge (Paczyński 1991). More than 200 events have been detected towards the Bulge since 1993 by the DUO, MACHO, OGLE etc. survey teams. But where are the lenses? Are they truly dark objects or merely faint stars? I show the results on the mass function, spatial distribution and dynamics of these observed lenses based on a dynamical model of the Galactic bar.

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 285 - 286
Copyright
Copyright © Kluwer 1998 

References

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