Galactic globular clusters contribution to microlensing events?

Details Galactic globular clusters contribution to microlensing events? Galactic globular clusters contribution to microlensing events?

2008-02-26

arxiv.org/abs/0802.3827v1

Int.J.Mod.Phys.D17:2305-2314,2008

Astronomy and Astrophysics

Astrophysics

11 pages, 3 figures, accepted for publication in International Journal of Modern Physics D

Scientific paper

10.1142/S0218271808013868

In this note we perform an analysis of the large set of microlensing events detected so far toward the Galactic center with the purpose of investigating whether some of the dark lenses are located in Galactic globular clusters. We find that in four cases some events might indeed be due to lenses located in the globular clusters themselves. We also give a rough estimate for the average lens mass of the subset of events being highly aligned with Galactic globular cluster centers and find that, under reasonable assumptions, the deflectors could most probably be either brown dwarfs, M-stars or stellar remnants.

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