HI rotation curves of spiral galaxiesBegeman, K., 2006, s.n.. 134 p.
Research output: Thesis › Thesis fully internal (DIV) › Academic
Observations of the spiral galaxy NGC 3198 in the 21-cm line are presented. The H I distribution extends to about two Holmberg radii and the radial velocity field is symmetric and regular over the entire area. A new method for the derivation of rotation curves is described. Results obtained show that the rotation curve of NGC 3198 is flat to within 5 km/s out to the last measured point at 11 disk scale lengths. This implies a large discrepancy between the observed rotation curve and that predicted from the light distribution.
- Proefschriften (vorm), Spiraalnevels, Rotatie , Waterstof, extragalactische stelsels
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