Computer Science
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phdt.........4g&link_type=abstract
Ph.D. Thesis Florida Univ., Gainesville.
Computer Science
3
Compact Galaxies, Galactic Structure, Hubble Diagram, Stellar Envelopes, Stellar Evolution, Stellar Luminosity, Galaxies, Intergalactic Media, Velocity Distribution
Scientific paper
The 21 cm neutral hydrogen line observations of 99 compact galaxies, most of the blue or very blue, are reported. Of these, 72 are detected in HI. These systems are found to be richer in HI than late type galaxies of the Hubble sequence and also to have higher surface luninosities. Approximately half of these blue compact systems are bluer than the bluest late type galaxies. Their HI velocity profiles are often narrow and single peaked, most often for the lower luminosity systems. However, the evidence suggests that the compact galaxies are rotating disk systems, perhaps with a strong central concentration of HI. The observations also indicate that at least some of these systems are quite extensive in their overall HI dimensions. It is possible that these HI rich, blue compact galaxies are old systems which have not yet completed their collapse out of the intergalactic medium. Primordial gas may be condensing into their central regions and could be the source of gas for intermittent, brief bursts of star formation.
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