Query : 2008A&A...478..429O

2008A&A...478..429O - Astronomy and Astrophysics, volume 478, 429-434 (2008/2-1)

Gravitational lensing as a probe of compact object populations in the Galaxy.


Abstract (from CDS):

The population of solitary compact objects in the Galaxy is very difficult to investigate. In this paper we examine the possibility of using microlensing searches to detect and to analyze the properties of solitary black holes and neutron stars. Evolution of single and binary stars is followed using the StarTrack population synthesis code. The spatial distribution of compact objects in the Galaxy is determined by propagating them in the Galactic gravitational potential. Lensing events are found by tracing individual stars and compact objects. We find that compact object lensing events are concentrated in a region with a radius of ≃5 degrees around the Galactic center. The distribution of masses of the lenses for the models we consider differs, but only slightly, from the underlying mass distribution of compact objects. The expected detection rates are of the order of a few per year.

Abstract Copyright:

Journal keyword(s): gravitational lensing - Galaxy: stellar content

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12913 0
2 MACHO 98-BLG-6 Lev 17 57 32.8 -28 42 45     19.5     G5IV 18 0
3 MACHO 104.20906.3973 Lev 18 05 02.5 -27 42 17           ~ 24 0
4 OGLE BUL-SC33 164492 * 18 05 05.28 -28 34 41.7           ~ 32 0

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