The Mass Distribution in Low Surface Brightness Galaxies

Details The Mass Distribution in Low Surface Brightness Galaxies The Mass Distribution in Low Surface Brightness Galaxies

2000-09-22

arxiv.org/abs/astro-ph/0009370v1

Astronomy and Astrophysics

Astrophysics

4 pages including 1 figure. Invited review for "Galaxy Disks and Disk Galaxies", eds. J.G. Funes S.J. & E.M. Corsini

Scientific paper

The distribution of the stellar and gaseous components in low surface brightness galaxies has been determined directly from optical and HI imaging. The distribution of what might be the dominant mass component, the dark matter, which is inferred from rotation curves, is far harder to determine. Although the rotation curves themselves can be determined fairly accurately from HI synthesis observations, and in particular from H$\alpha$ spectroscopy, the uncertainty in the mass modeling leaves room for a wide range of possible dark matter distributions, ranging from maximum stellar disks with shallow dark halos to cuspy dark halos with little mass in stars.

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