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Authordc.contributor.authorSun, Jiayi 
Authordc.contributor.authorLeroy, Adam K. 
Authordc.contributor.authorSchruba, Andreas 
Authordc.contributor.authorRosolowsky, Erik 
Authordc.contributor.authorHughes, Annie 
Authordc.contributor.authorKruijssen, J. M. Diederik 
Authordc.contributor.authorMeidt, Sharon 
Authordc.contributor.authorSchinnerer, Eva 
Authordc.contributor.authorBlanc Mendiberri, Guillermo 
Authordc.contributor.authorBigiel, Frank 
Authordc.contributor.authorChevance, Melanie 
Authordc.contributor.authorGroves, Brent 
Authordc.contributor.authorHerrera, Cinthya N. 
Authordc.contributor.authorHygate, Alexander P. S. 
Authordc.contributor.authorPety, Jerome 
Authordc.contributor.authorQuerejeta, Miguel 
Authordc.contributor.authorUsero, Antonio 
Authordc.contributor.authorUtomo, Dyas 
Authordc.contributor.authorBolatto, Alberto D. 
Cita de ítemdc.identifier.citationThe Astrophysical Journal Volumen: 860 Número: 2 Número de artículo: 172es_ES
Abstractdc.description.abstractWe measure the velocity dispersion, sigma, and surface density, Sigma, of the molecular gas in nearby galaxies from CO spectral line cubes with spatial resolution 45-120. pc, matched to the size of individual giant molecular clouds. Combining 11 galaxies from the PHANGS-ALMA survey with four targets from the literature, we characterize similar to 30,000 independent sightlines where CO is detected at good significance. Sigma and sigma show a strong positive correlation, with the best-fit power-law slope close to the expected value for resolved, self-gravitating clouds. This indicates only a weak variation in the virial parameter alpha(vir) proportional to sigma(2)/Sigma, which is similar to 1.5-3.0 for most galaxies. We do, however, observe enormous variation in the internal turbulent pressure P-turb proportional to Sigma sigma(2), which spans similar to 5 dex across our sample. We find Sigma, sigma , and P-turb to be systematically larger in more massive galaxies. The same quantities appear enhanced in the central kiloparsec of strongly barred galaxies relative to their disks. Based on sensitive maps of M31 and M33, the slope of the sigma-Sigma relation flattens at Sigma less than or similar to 10M(circle dot) pc(-2), leading to high s for a given S and high apparent avir. This echoes results found in the Milky Way and likely originates from a combination of lower beam-filling factors and a stronger influence of local environment on the dynamical state of molecular gas in the low-density regime.es_ES
Patrocinadordc.description.sponsorshipINSU/CNRS (France) MPG (Germany) IGN (Spain) National Science Foundation 1615105 1615109 1653300 Natural Sciences and Engineering Research Council of Canada (NSERC) RGPIN-2017-03987 Centre National d'Etudes Spatiales (CNES) German Research Foundation (DFG) KR4801/1-1 European Research Council (ERC) under European Union's Horizon 2020 research and innovation program via the ERC Starting Grant MUSTANG 714907 CONICYT/FONDECYT, Programa de Iniciacion Folio 11150220 Programme National "Physique et Chimie du Milieu Interstellaire" (PCMI) of CNRS/INSU INC/INP CEA CNES Spanish MINECO ESP2015-68964 AYA2016-79006 European Research Council (ERC) under the European Unions 694343es_ES
Publisherdc.publisherThe American Astronomical Societyes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceThe Astrophysical Journales_ES
Keywordsdc.subjectGalaxies: ISMes_ES
Keywordsdc.subjectGalaxies: spirales_ES
Keywordsdc.subjectGalaxies: star formationes_ES
Keywordsdc.subjectISM: cloudses_ES
Keywordsdc.subjectISM: moleculeses_ES
Keywordsdc.subjectISM: structurees_ES
Títulodc.titleCloud-scale molecular gas properties in 15 nearby galaxieses_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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