The Milky Way and the Tully-Fisher relation

Details The Milky Way and the Tully-Fisher relation The Milky Way and the Tully-Fisher relation

2005-10-18

arxiv.org/abs/astro-ph/0510515v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, to appear in the proceedings of "Island Universes - Structure and Evolution of Disk Galaxies", R.S. de Jon

Scientific paper

We present an updated estimate of the surface density and surface brightness in B,V,I of the local Galactic disc, based on a model for the "Solar cylinder" calibrated to reproduce Hipparcos and Tycho star counts. We discuss the mass-to-light ratio of the local stellar disc and infer the global luminosity of the Milky Way, which results underluminous with respect to the Tully-Fisher relation.

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