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dc.contributor.authorKaufman, Michele
dc.contributor.authorElmegreen, Bruce G.
dc.contributor.authorStruck, Curtis
dc.contributor.authorElmegreen, Debra Meloy
dc.contributor.authorBournaud, Frederic
dc.contributor.authorBrinks, Elias
dc.contributor.authorJuneau, Stephanie
dc.contributor.authorSheth, Kartik
dc.date.accessioned2017-01-11T20:27:22Z
dc.date.available2017-01-11T20:27:22Z
dc.date.issued2016-11-04
dc.identifier.citationKaufman , M , Elmegreen , B G , Struck , C , Elmegreen , D M , Bournaud , F , Brinks , E , Juneau , S & Sheth , K 2016 , ' Ocular Shock Front in the Colliding Galaxy IC 2163 ' , The Astronomical Journal , vol. 831 , no. 2 , 161 . https://doi.org/10.3847/0004-637X/831/2/161
dc.identifier.issn0004-6256
dc.identifier.otherPURE: 10453448
dc.identifier.otherPURE UUID: 2b98e606-e211-46ae-9597-7c2d5b0cc2e0
dc.identifier.otherArXiv: http://arxiv.org/abs/1608.02130v2
dc.identifier.otherScopus: 84994533216
dc.identifier.otherORCID: /0000-0002-7758-9699/work/30407785
dc.identifier.urihttp://hdl.handle.net/2299/17489
dc.descriptionThe final, definitive version of this paper has been published in The Astrophysical Journal, 831:161 (13pp), 2016 November 4, doi:10.3847/0004-637X/831/2/161 © 2016. The American Astronomical Society. All rights reserved
dc.description.abstractALMA observations in the CO 1 - 0 line of the interacting galaxies IC 2163 and NGC 2207 at 2" x 1.5" resolution reveal how the encounter drives gas to pile up in narrow, ~ 1 kpc wide, "eyelids" in IC 2163. IC 2163 and NGC 2207 are involved in a grazing encounter, which has led to development in IC 2163 of an eye-shaped (ocular) structure at mid-radius and two tidal arms. The CO data show that there are large velocity gradients across the width of each eyelid, with a mixture of radial and azimuthal streaming of gas at the outer edge of the eyelid relative to its inner edge. The sense of the radial streaming in the eyelids is consistent with the idea that gas from the outer part of IC 2163 flows inward until its radial streaming slows down abruptly and the gas piles up in the eyelids. The radial compression at the eyelids causes an increase in the gas column density by direct radial impact and also leads to a high rate of shear. We find a strong correlation between the molecular column densities and the magnitude of dv/dR across the width of the eyelid at fixed values of azimuth. Substantial portions of the eyelids have high velocity dispersion in CO, indicative of elevated turbulence there.en
dc.language.isoeng
dc.relation.ispartofThe Astronomical Journal
dc.rightsOpen
dc.subjectastro-ph.GA
dc.titleOcular Shock Front in the Colliding Galaxy IC 2163en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2016-11-04
rioxxterms.versionAM
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/0004-637X/831/2/161
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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