Microlensing in globular clusters: the first confirmed lens
Abstract
Microlensing observations toward globular clusters could be very useful to probe their low mass star and brown dwarf content. Using the large set of microlensing events detected so far toward the Galactic centre we investigated whether for some of the observed events the lenses are located in the Galactic globular clusters. Indeed, we found that in four cases some events might be due to lenses located in the globular clusters themselves. Moreover, we discuss a microlensing event found in M22. Using the adaptive optics system NACO at ESO VLT it was possible to identify the lens, which turned out to be a low mass star of about 0.18 solar masses in the globular cluster M22 itself.
Cite
@article{arxiv.1304.5738,
title = {Microlensing in globular clusters: the first confirmed lens},
author = {Philippe Jetzer},
journal= {arXiv preprint arXiv:1304.5738},
year = {2013}
}
Comments
3 pages, to appear in the proceedings of the 13th Marcel Grossmann Meeting, Stockholm (2012)