HI content and other structural properties of galaxies in the Virgo cluster from the Arecibo Legacy Fast ALFA Survey

G. Gavazzi*, R. Giovanelli, M. P. Haynes, S. Fabello, M. Fumagalli, B. R. Kent, R. A. Koopmann, N. Brosch, G. L. Hoffman, J. J. Salzer, A. Boselli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report the results of an HI blind survey of 80 deg of the Virgo cluster, based on the 08° 16° strip of ALFALFA, the Arecibo Legacy Fast ALFA Survey. 187 HI sources of high significance are found providing a complete census of HI sources in this region of the Virgo cluster ( km s) with . 156/187 (83%) sources are identified with optical galaxies from the Virgo Cluster Catalogue (Binggeli et al. 1985, AJ, 90, 1681), all but 8 with late-type galaxies. Ten sources are not associated with optical galaxies and were found to correspond to tidally-disrupted systems (see Kent et al. 2007, ApJ, 665, L15; and Haynes et al. 2007, ApJ, 665, L19). The remaining 21 (11%) are associated with galaxies that are not listed in the Virgo Cluster Catalogue. For all sources with an optical counterpart in the Sloan Digital Sky Survey, we analyzed -band SDSS plates to measure optical structural parameters. We find that in the Virgo cluster: i) HI inhabits galaxies that are structurally similar to ordinary late-type galaxies; ii) their HI content can be predicted from their optical luminosity; iii) low surface brightness galaxies have low optical luminosity and contain small quantities of neutral hydrogen; iv) low surface brightness, massive Malin1 type galaxies are comfortably rare objects (less than 0.5%); v) there are no "dark-galaxies" with HI masses ; vi) less than 1% of early-type galaxies contain neutral hydrogen with (di Serego Alighieri et al. 2007, A&A, 474, 851).

Original languageEnglish
Pages (from-to)43-52
Number of pages10
JournalAstronomy and Astrophysics
Issue number1
StatePublished - Apr 2008


  • Galaxies: ISM
  • Galaxies: clusters: individual: Virgo
  • Galaxies: evolution
  • galaxies: fundamental parameters


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