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Authordc.contributor.authorEvans, Neal J.
Authordc.contributor.authorHeyer, Mark
Authordc.contributor.authorMiville Deschenes, Marc Antoine
Authordc.contributor.authorNguyen Luong, Quang
Authordc.contributor.authorMerello, Manuel
Admission datedc.date.accessioned2022-03-03T20:06:19Z
Available datedc.date.available2022-03-03T20:06:19Z
Publication datedc.date.issued2021
Cita de ítemdc.identifier.citationThe Astrophysical Journal, 920:126 (20pp), 2021 October 20es_ES
Identifierdc.identifier.other10.3847/1538-4357/ac1425
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/184015
Abstractdc.description.abstractWe analyze surveys of molecular cloud structures defined by tracers ranging from CO J = 1 → 0 through 13CO J = 1 → 0 to dust emission together with NH3 data. The mean value of the virial parameter and the fraction of mass in bound structures depends on the method used to identify structures. Generally, the virial parameter decreases and the fraction of mass in bound structures increases with the effective density of the tracer, the surface density and mass of the structures, and the distance from the center of a galaxy. For the most complete surveys of structures in the Galaxy defined by CO J = 1 → 0, the fraction of mass that is in bound structures is 0.19. For catalogs of other galaxies based on CO J = 2 → 1, the fraction is 0.35. These results offer substantial alleviation of the fundamental problem of slow star formation. If only clouds found to be bound are counted and they are assumed to collapse in a freefall time at their mean cloud density, the sum over all clouds in a complete survey of the Galaxy yields a predicted star formation rate of 46 M⊙ yr−1, a factor of 6.5 less than if all clouds are bound.es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherIOPes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
Sourcedc.sourceThe Astrophysical Journales_ES
Keywordsdc.subjectStar-formation ratees_ES
Keywordsdc.subjectOb associationses_ES
Keywordsdc.subjectMilky-wayes_ES
Keywordsdc.subjectGalactic distributiones_ES
Keywordsdc.subjectPhysical-propertieses_ES
Keywordsdc.subjectDense clumpses_ES
Keywordsdc.subjectCo surveyes_ES
Keywordsdc.subjectGases_ES
Keywordsdc.subjectTurbulencees_ES
Keywordsdc.subjectRegionses_ES
Títulodc.titleWhich molecular cloud structures are bound?es_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Catalogueruchile.catalogadorcrbes_ES
Indexationuchile.indexArtículo de publícación WoSes_ES


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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States