Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185...61s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. 61-76.
Astronomy and Astrophysics
Astrophysics
74
Galactic Evolution, H I Regions, Irregular Galaxies, Neutral Gases, Stellar Evolution, Virgo Galactic Cluster, Dark Matter, Mass Distribution, Mass To Light Ratios, Stellar Luminosity
Scientific paper
The authors present results from H I synthesis observations and optical surface photometry of four dwarf irregular galaxies within the Virgo Cluster. H I distributions and rotation curves have been calculated for the four galaxies. One galaxy shows strong evidence that it is presently falling into the Virgo Cluster core and being stripped. Overall, the results support the proposal of Bothun et al. (1985) that the dwarf irregular population is presently outside of the dense core. Three of the galaxies suggest evidence for dark matter in small gravitational systems (luminous mass ≡108M_sun;). From rotation curve analysis the authors derive total M/L ratios of order 5 to 10.
Bothun Gragory D.
Murray M. A.
Skillman Evan D.
Warmels Rein H.
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