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Triggering the formation of the supergiant H II region NGC 604 in M33

dc.contributor.authorTACHIHARA, Kengo
hal.structure.identifierAMOR 2018
dc.contributor.authorGRATIER, P.
dc.contributor.authorSANO, Hidetoshi
dc.contributor.authorTSUGE, Kisetsu
dc.contributor.authorMIURA, Rie E.
dc.contributor.authorMURAOKA, Kazuyuki
dc.contributor.authorFUKUI, Yasuo
dc.date.issued2018
dc.identifier.issn0004-6264
dc.description.abstractEnFormation mechanism of a supergiant H II region NGC 604 is discussed in terms of collision of H I clouds in M33. An analysis of the archival H I data obtained with the Very Large Array (VLA) reveals complex velocity distributions around NGC 604. The H I clouds are composed of two velocity components separated by ~ 20 km s^-1 for an extent of ~ 700 pc, beyond the size of the the H II region. Although the H I clouds are not easily separated in velocity with some mixed component represented by merged line profiles, the atomic gas mass amounts to 6 x 10^6 M_Sol and 9 x 10^6 M_Sol for each component. These characteristics of H I gas and the distributions of dense molecular gas in the overlapping regions of the two velocity components suggest that the formation of giant molecular clouds and the following massive cluster formation have been induced by the collision of H I clouds with different velocities. Referring to the existence of gas bridging feature connecting M33 with M31 reported by large-scale HI surveys, the disturbed atomic gas possibly represent the result of past tidal interaction between the two galaxies, which is analogous to the formation of the R136 cluster in the LMC.
dc.language.isoen
dc.publisherOxford university press
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enTriggering the formation of the supergiant H II region NGC 604 in M33
dc.typeArticle de revue
dc.identifier.doi10.1093/pasj/psy020
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1802.02310
bordeaux.journalPublications of the Astronomical Society of Japan
bordeaux.pageid.S52
bordeaux.volume70
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01725061
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01725061v1
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