Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..466h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 15, 1986, p. 466-482.
Astronomy and Astrophysics
Astronomy
99
Hydrogen, Interstellar Gas, Radio Astronomy, Virgo Galactic Cluster, Centimeter Waves, Line Spectra, Red Shift
Scientific paper
A sample of 160 galaxies in the Virgo region, including 16 new 21-cm profiles in the Virgo 5-degree core obtained with the 305-m Arecibo telescope, are examined to investigate the severe depletion of interstellar H I within spiral galaxies in the Virgo cluster core. A similar and non-Gaussian distribution is found for the distribution of H I deficiencies of both faint galaxies and brighter spirals, and populations of galaxies with normal abundances of interstellar H I, and those of gas poor objects exhibiting a late-type morphology, are both noted. One-sixth of the sample within the Virgo 5-degree core have lost more than 90 percent by mass of their original neutral hydrogen, and three quarters of the galaxies found within 2.5 degrees of M87 are H I poor by more than a factor of three. The most deficient galaxies are also found to be the ones with the smallest ratios of H I to optical disk size, and H I poor galaxies are redder than normal, indicating that star formation has been quenched.
Giovanelli Riccardo
Haynes Martha P.
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