Does low surface brightness mean low surface density?

Details Does low surface brightness mean low surface density? Does low surface brightness mean low surface density?

1996-07-08

arxiv.org/abs/astro-ph/9607042v1

Astronomy and Astrophysics

Astrophysics

10 pages, including 2 postscript figures, uses aas2pp4.sty, accepted for publication in Astrophysical Journal Letters

Scientific paper

10.1086/310266

We compare the dynamical properties of two galaxies at identical positions on the Tully-Fisher relation, but with different surface brightnesses. We find that the low surface brightness galaxy UGC 128 has a higher mass-to-light ratio, and yet has lower mass densities than the high surface brightness galaxy NGC 2403. This is true for the gas surface density, the stellar surface density, and the total mass density.

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