Rotation curve of NGC 488
The rotation curve of NGC 488 has been measured out to a radius of 20 kpc, at which point the velocity is 363 km s/sup -1/ and continuing to increase with radius. This rotational velocity is the largest known for an Sb galaxy. For a mass model based on the thin-disk approximation of Kuzmin (Publ. Tartu Astron. Obs. 32, 211 (1952)), we find the mass and mass-luminosity interior to 20 kpc are M > or approx. = 4.0 x 10/sup 11/ M/sub sun/ and /sub B/ > or approx. = 3.6. Exterior to the nuclear region, the mass-luminosity ratio shows only a gentle increase with radius.
- Research Organization:
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65201
- OSTI ID:
- 5588795
- Journal Information:
- Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 85:3; ISSN ANJOA
- Country of Publication:
- United States
- Language:
- English
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