Do low surface brightness galaxies have dense disks?

Details Do low surface brightness galaxies have dense disks? Do low surface brightness galaxies have dense disks?

2010-06-24

arxiv.org/abs/1006.4718v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 10 figures, submitted to Astronomy Reports

Scientific paper

The disk masses of four low surface brightness galaxies (LSB) were estimated using marginal gravitational stability criterion and the stellar velocity dispersion data which were taken from Pizzella et al., 2008 [1]. The constructed mass models appear to be close to the models of maximal disk. The results show that the disks of LSB galaxies may be significantly more massive than it is usually accepted from their brightnesses. In this case their surface densities and masses appear to be rather typical for normal spirals. Otherwise, unlike the disks of many spiral galaxies, the LSB disks are dynamically overheated.

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