Other
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.6502t&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #65.02; Bulletin of the American Astronomical Society, Vol. 24, p.1221
Other
Scientific paper
HII Galaxies are HI rich galaxies which contain one or a few high surface brightness optical knots whose spectra resemble those of HII regions. These knots are areas of intense star formation. The current star formation rates are too high to last a Hubble time, leading to the hypothesis that HII galaxies undergo star formation in discrete bursts. One possible explanation for this phenomenon is that a gravitational interaction triggers the burst of star formation in an otherwise quiescent galaxy. Taylor, Brinks, and Skillman (1993, AJ in press) mapped in HI 9 isolated HII galaxies with the VLA in its most compact configuration. Five HI companions were discovered near four of the HII galaxies. These HI companions were within a radius of 30 arcmin and within 240 km/s. The companions were typically one order of magnitude smaller than their parent galaxies in both neutral hydrogen and total mass. Motivated by this success, we have obtained 21-cm VLA observations of a complete, volume limited sample of HII galaxies without obvious interaction partners. The current sample consists of nineteen members with velocities less than 2500 km/s. From our observations we have positively identified five companions, and are investigating seven more potential detections. A preliminary analysis of the these objects, and the statistical significance of the detection rate, are presented.
Brinks Elias
Skillman Evan D.
Taylor Christopher Lee
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