| Issue |
A&A
Volume 546, October 2012
|
|
|---|---|---|
| Article Number | A126 | |
| Number of page(s) | 9 | |
| Section | Galactic structure, stellar clusters and populations | |
| DOI | https://doi.org/10.1051/0004-6361/201219926 | |
| Published online | 18 October 2012 | |
Gravitational microlensing as a test of a finite-width disk model of the Galaxy
1
Institute of Physics, Jagellonian University,
Reymonta 4,
30059
Kraków,
Poland
2
Institute of Nuclear Physics, Polish Academy of Sciences,
Radzikowskego 152,
31342
Kraków,
Poland
e-mail: Lukasz.Bratek@ifj.edu.pl
Received:
29
June
2012
Accepted:
21
August
2012
The aim of this work is to show, in the framework of a simple finite-width disk model, that the amount of mass seen through gravitational microlensing measurements in the region 0 < R < R° is consistent with the dynamical mass ascertained from Galaxy rotation after subtracting gas contribution. Since microlensing only detects compact objects, this result suggests that a non-baryonic mass component may be negligible in this region.
Key words: gravitational lensing: micro / Galaxy: bulge / Galaxy: disk / Galaxy: structure / dark matter
© ESO, 2012
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