| Issue |
A&A
Volume 429, Number 2, January II 2005
|
|
|---|---|---|
| Page(s) | 439 - 447 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20041678 | |
| Published online | 17 December 2004 | |
Completing H I observations of galaxies in the Virgo cluster*
1
Universitá degli Studi di Milano-Bicocca, Piazza delle scienze 3, 20126 Milano, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
Laboratoire d'Astrophysique de Marseille, BP8, Traverse du Siphon, 13376 Marseille, France e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
3
Observatoire de Paris, Section de Meudon, GEPI, CNRS UMR 8111 and Université Paris 7, 5 place Jules Janssen, 92195 Meudon Cedex, France e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4
NRAO, PO Box 2, Green Bank, WV 24944, USA e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
16
July
2004
Accepted:
2
September
2004
Abstract
High sensitivity (rms noise ∼0.5 mJy) 21-cm H i line observations were made of
33 galaxies in the Virgo cluster, using the refurbished Arecibo telescope,
which resulted in the detection of 12 objects.
These data, combined with the measurements available from the literature, provide the first set of H i data that is complete
for all 355 late-type (Sa-Im-BCD) galaxies in the Virgo cluster with
mag.
The Virgo cluster H i mass function (HIMF) that was derived for this optically selected galaxy sample is
in agreement with the HIMF derived for the Virgo cluster from the blind HIJASS H i survey
and is inconsistent with the Field HIMF.
This indicates that both in this rich cluster and in the general field, neutral hydrogen
is primarily associated with late-type galaxies, with marginal contributions
from early-type galaxies and isolated H i clouds. The inconsistency between the cluster and the field HIMF
derives primarily from the difference in the optical luminosity function of late-type galaxies in the two environments,
combined with the HI deficiency that is known to occur in galaxies in rich clusters.
Key words: galaxies: distances and redshifts / galaxies: general / galaxies: ISM / galaxies: clusters: individual Virgo / radio lines: galaxies
Tables [see full text], [see full text] and Appendix A are only available in electronic form at http://www.edpsciences.org
© ESO, 2005
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