Evolution of spiral galaxies in the Virgo Cluster. I - Statistical analysis of H I deficiency and colors

Details Evolution of spiral galaxies in the Virgo Cluster. I - Statistical analysis of H I deficiency and colors Evolution of spiral galaxies in the Virgo Cluster. I - Statistical analysis of H I deficiency and colors

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..108g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 1, Oct. 1985, p. 108-120.

Astronomy and Astrophysics

Astronomy

26

Galactic Evolution, Hydrogen Clouds, Spiral Galaxies, Virgo Galactic Cluster, Astronomical Photometry, H Alpha Line, Nebulae, Statistical Analysis, Ubv Spectra, Ultraviolet Astronomy

Scientific paper

The authors present a compilation of H I data and available UBV, far-UV (λ2421 Å) and Hα photometry for 107 spiral and irregular galaxies (S0/a-Im) in the Virgo Cluster, to be compared with a reference sample of 405 "field" galaxies. They confirm with better statistics the H I deficiency of Virgo Cluster spirals, at fixed morphological type and optical surface, which was found in previous studies. The following conclusions are reached: (1) H I deficient spirals are located in subgroups inside Virgo I, in association with the hot gaseous intergalactic medium. Virgo X is not H I deficient. (2) Early-type spirals are more likely to be H I deficient than late-type ones. The deficiency closely correlates with the colors through this type effect. (3) Virgo Cluster spirals have redder (B-V)T0 and (U-B)T0 than reference counterparts, in rough agreement with their H I contents. (4) The Hα+[N II] equivalent widths well correlate with the H I contents for the Virgo Cluster spirals as well as the reference sample.

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