Microlensing and Galactic Structure

Details Microlensing and Galactic Structure Microlensing and Galactic Structure

2000-04-26

arxiv.org/abs/astro-ph/0004362v1

Astronomy and Astrophysics

Astrophysics

12 pages to appear in Microlensing 2000, A New Era of Microlensing Astrophysics J.W. Menzies and P.D. Sackett, eds

Scientific paper

Because we know little about the Galactic force-field away from the plane, the Galactic mass distribution is very ill-determined. I show that a microlensing survey of galaxies closer than 50 Mpc would enable us to map in three dimensions the Galactic density of stellar mass, which should be strictly less than the total mass density. A lower limit can be placed on the stellar mass needed at R

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