An H I survey of six Local Group analogs. II. H I properties of group galaxies

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dc.creator Pisano, D. J.
dc.creator Barnes, David G.
dc.creator Staveley-Smith, Lister
dc.creator Gibson, Brad K.
dc.creator Kilborn, Virginia A.
dc.creator Freeman, Ken C.
dc.date.accessioned 2018-04-17T18:16:36Z
dc.date.available 2018-04-17T18:16:36Z
dc.date.issued 2011-12
dc.identifier.issn 0067-0049
dc.identifier.uri http://library2.smu.ca/handle/01/27423
dc.description Publisher's Version/PDF
dc.description.abstract We have conducted an H I 21 cm emission-line survey of six loose groups of galaxies chosen to be analogs to the Local Group. The survey was conducted using the Parkes multibeam instrument and the Australia Telescope Compact Array (ATCA) over a &sim;1 Mpc<sup>2</sup> area and covering the full depth of each group, with an M<sub>H I</sub> sensitivity of &sim;7 &times; 10<sup>5</sup> M<sub>☉</sub>. Our survey detected 110 sources, 61 of which are associated with the six groups. All of these sources were confirmed with ATCA observations or were previously cataloged by HIPASS. The sources all have optical counterparts and properties consistent with dwarf irregular or late-type spiral galaxies. We present here the H I properties of the groups and their galaxies. We derive an H I mass function (HIMF) for the groups that is consistent with being flatter than the equivalent field HIMF. We also derive a circular velocity distribution function, tracing the luminous dark matter halos in the groups, that is consistent with those of the Local Group and HIPASS galaxies, both of which are shallower than that of clusters or predictions from cold dark matter models of galaxy formation. en_CA
dc.language.iso en en_CA
dc.publisher IOP Publishing Limited en_CA
dc.relation.uri https://dx.doi.org/10.1088/0067-0049/197/2/28
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Galaxies -- Evolution
dc.subject.lcsh Galaxies -- Formation
dc.subject.lcsh Galaxies -- Clusters
dc.subject.lcsh Local Group (Astronomy)
dc.title An H I survey of six Local Group analogs. II. H I properties of group galaxies en_CA
dc.title.alternative H one survey of six Local Group analogs. II. H one properties of group galaxies
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal Supplement Series 197(2), 28. (2012) en_CA


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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: https://dx.doi.org/10.1088/0067-0049/197/2/28
 
 

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