Publication:
Atomic and Molecular Gas in Colliding Galaxy Systems. I. The Data

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dc.contributor.authorIono, D
dc.contributor.authorYun, Min
dc.contributor.authorHo, PTP
dc.contributor.departmentUniversity of Massachusetts - Amherst
dc.date2023-09-23T03:42:22.000
dc.date.accessioned2024-04-26T08:25:48Z
dc.date.available2024-04-26T08:25:48Z
dc.date.issued2005-01-01
dc.description<p>This is the pre-published version harvested from ArXiv. The published version is located at <a href="http://iopscience.iop.org/0067-0049/158/1/1/">http://iopscience.iop.org/0067-0049/158/1/1/</a></p>
dc.description.abstractWe present H I and CO (1-0) interferometric observations of 10 comparable-mass interacting systems obtained at the Very Large Array (VLA) and the Owens Valley Radio Observatory (OVRO) millimeter array. The primary intent of this study is to investigate the response of cold gas during the early stages of collision of massive disk galaxies. The sample sources are selected based on their luminosity (MB ≤ -19), projected separation (5-40 kpc), and single-dish CO (1-0) content (SCO ≥ 20 Jy km s-1). These selection criteria result in a sample that primarily consists of systems in the early stages of an interaction or a merger. Despite this sample selection, 50% of the systems show long H I tidal tails indicative of a tidal disruption in a prograde orbit. In addition, all (4/4) of the infrared luminous pairs (LIRGs) in the sample show long H I tails, suggesting that the presence of a long H I tail can be a possible signature of enhanced star formation activity in a collision of gas-rich galaxies. More than half of the groups show a displacement of H I peaks from the stellar disks. The CO (1-0) distribution is generally clumpy and widely distributed, unlike in most IR-selected late stage mergers—in fact, CO peaks are displaced from the stellar nucleus in 20% (4/18) of the galaxies with robust CO detection. H I and CO (1-0) position-velocity diagrams (PVDs) and rotation curves are also presented, and their comparison with the numerical simulation analyzed in Paper I show evidence for radial inflow and wide occurrences of nuclear molecular rings. These results are further quantified by examining physical and structural parameters derived in comparison with isolated systems in the BIMA SONG sample in our forthcoming paper.
dc.description.pages1
dc.identifier.doihttps://doi.org/10.1086/429093
dc.identifier.urihttps://hdl.handle.net/20.500.14394/2726
dc.relation.ispartofThe Astrophysical Journal Supplement Series
dc.relation.urlhttps://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2105&amp;context=astro_faculty_pubs&amp;unstamped=1
dc.source.issue1
dc.source.issue158
dc.source.statuspublished
dc.subjectgalaxies: evolution; galaxies: individual (NGC 5257/5258
dc.subjectNGC 5394/5395
dc.subjectUGC 12914/12915
dc.subjectNGC 5331
dc.subjectNGC 6621/6622
dc.subjectUGC 813/816
dc.subjectNGC 7253/7254
dc.subjectNGC 4567/4568
dc.subjectNGC 7592
dc.subjectNGC 5953/5954); galaxies: interactions; galaxies: ISM; galaxies: kinematics and dynamics
dc.subjectAstrophysics and Astronomy
dc.titleAtomic and Molecular Gas in Colliding Galaxy Systems. I. The Data
dc.typearticle
dc.typearticle
digcom.contributor.authorIono, D
digcom.contributor.authorisAuthorOfPublication|email:myun@astro.umass.edu|institution:University of Massachusetts - Amherst|Yun, Min
digcom.contributor.authorHo, PTP
digcom.identifierastro_faculty_pubs/1104
digcom.identifier.contextkey1958662
digcom.identifier.submissionpathastro_faculty_pubs/1104
dspace.entity.typePublication
relation.isAuthorOfPublication36d012cf-6d65-42c1-91b8-fbec638580d7
relation.isAuthorOfPublication.latestForDiscovery36d012cf-6d65-42c1-91b8-fbec638580d7
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