Context. Pre-processing within small groups has been proposed to explain several of the properties of galaxies lying in rich clusters.Aims. The aim of the present work is to see whether pre-processing is acting in the nearby universe, where the structures that are merging to form rich clusters are large and massive.Methods. We study the HI gas properties of a large sample of late-type galaxies belonging to the Coma I cloud, an association of objects close to the Virgo cluster.Results. Contrary to what was previously claimed, late-type galaxies in the Coma I cloud are not deficient in HI gas (HI-def=0.06± 0.44).Conclusions. If the Coma I cloud is representative of infalling groups in nearby clusters, this result suggests that, in the local universe, the evolution of late-type galaxies belonging to loose structures with high velocity dispersions (≥300 kms-1) associated with rich clusters such as Virgo is not significantly perturbed by pre-processing. © 2009 ESO

Boselli, A., & Gavazzi, G. (2009). The HI properties of galaxies in the Coma I cloud revisited. ASTRONOMY & ASTROPHYSICS, 508(1), 201-207 [10.1051/0004-6361/200912658].

The HI properties of galaxies in the Coma I cloud revisited

Gavazzi, G
2009

Abstract

Context. Pre-processing within small groups has been proposed to explain several of the properties of galaxies lying in rich clusters.Aims. The aim of the present work is to see whether pre-processing is acting in the nearby universe, where the structures that are merging to form rich clusters are large and massive.Methods. We study the HI gas properties of a large sample of late-type galaxies belonging to the Coma I cloud, an association of objects close to the Virgo cluster.Results. Contrary to what was previously claimed, late-type galaxies in the Coma I cloud are not deficient in HI gas (HI-def=0.06± 0.44).Conclusions. If the Coma I cloud is representative of infalling groups in nearby clusters, this result suggests that, in the local universe, the evolution of late-type galaxies belonging to loose structures with high velocity dispersions (≥300 kms-1) associated with rich clusters such as Virgo is not significantly perturbed by pre-processing. © 2009 ESO
Si
Articolo in rivista - Articolo scientifico
Scientifica
Galaxies: clusters: general; Galaxies: distances and redshifts; Galaxies: general; Galaxies: ISM
English
201
207
7
Boselli, A., & Gavazzi, G. (2009). The HI properties of galaxies in the Coma I cloud revisited. ASTRONOMY & ASTROPHYSICS, 508(1), 201-207 [10.1051/0004-6361/200912658].
Boselli, A; Gavazzi, G
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/8020
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