VII Zw 403: A Blue Compact Dwarf Case Study

Details VII Zw 403: A Blue Compact Dwarf Case Study VII Zw 403: A Blue Compact Dwarf Case Study

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8104s&link_type=abstract

American Astronomical Society Meeting 210, #81.04; Bulletin of the American Astronomical Society, Vol. 39, p.190

Astronomy and Astrophysics

Astronomy

Scientific paper

We present broadband optical, Hα, and HI observations of the small blue compact dwarf (BCD) VII Zw 403. This system has one very large star forming complex, which previous work (Lynds et al. 1998) shows was more active 600-800 Myr ago. Its central surface brightness is lower than for comparable BCDs, and its optical scale length is larger, although less than for low surface brightness dwarfs. The HI associated with the galaxy is centrally concentrated with little structure. A rotation curve analysis shows that VII ZW 403 is a slow rotator, with a peak velocity of about 20 km/s. There is no obvious trigger for the star formation episode: no nearby perturbers are found, the stellar component is not particularly centrally concentrated, and no bar is apparent to transfer gas.
Support for this research came from the Lowell Research Fund and grants from the National Science Foundation.

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