Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-11-02
Astronomy and Astrophysics
Astrophysics
4 pages, 3 postscript figures; requires moriond.sty; to appear in the proceedings of the Moriond Conference `Building Galaxies
Scientific paper
`Superthins' are a subset of edge-on spiral galaxies exhibiting disks with large axial ratios (a/b>10), extraordinarily small stellar scale heights, and no bulge component. These are thus examples of dynamically cold, pure disk galaxies. We have recently obtained multiwavelength (HI, optical, NIR) observations for a large sample of superthin spirals. Our data lead to a picture of superthins as `underevolved' disk galaxies in both a dynamical and a star formation sense. Studies of these relatively simple disk systems can therefore provide unique constraints on galaxy disk formation and evolution without looking beyond the local universe. We present the results of a detailed analysis of the nearby superthin UGC 7321 as an illustration of these ideas.
Driel Willem van
Gallagher Jay S.
Matthews Lynn Diane
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