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The W43-MM1 mini-starburst ridge, a test for star formation efficiency models

dc.contributor.authorLOUVET, Fabien
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorMOTTE, Frédérique
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorHENNEBELLE, Patrick
dc.contributor.authorBONNELL, Ian
hal.structure.identifierUniversité de Bordeaux [UB]
hal.structure.identifierFORMATION STELLAIRE 2014
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
dc.contributor.authorBONTEMPS, Sylvain
hal.structure.identifierInstitut d'astrophysique spatiale [IAS]
dc.contributor.authorGUSDORF, Antoine
dc.contributor.authorHILL, Tracey
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorGUETH, Frédéric
dc.contributor.authorPERETTO, Nicolas
dc.contributor.authorDUARTE-CABRAL, A.
dc.contributor.authorSTEPHAN, Gwendoline
hal.structure.identifierI. Physikalisches Institut [Köln]
dc.contributor.authorSCHILKE, Peter
dc.contributor.authorCSENGERI, Timéa
dc.contributor.authorLUONG, Quang Nguyen
dc.contributor.authorLIS, Darek
dc.date.created2014-04-18
dc.date.issued2014
dc.identifier.issn0004-6361
dc.description.abstractEnContext: Star formation efficiency (SFE) theories are currently based on statistical distributions of turbulent cloud structures and a simple model of star formation from cores. They remain poorly tested, especially at the highest densities. Aims: We investigate the effects of gas density on the SFE through measurements of the core formation efficiency (CFE). With a total mass of $\sim2\times10^4$ M$_\odot$, the W43-MM1 ridge is one of the most convincing candidate precursor of starburst clusters and thus one of the best place to investigate star formation. Methods: We used high-angular resolution maps obtained at 3 mm and 1 mm within W43-MM1 with the IRAM Plateau de Bure Interferometer to reveal a cluster of 11 massive dense cores (MDCs), and, one of the most massive protostellar cores known. An Herschel column density image provided the mass distribution of the cloud gas. We then measured the 'instantaneous' CFE and estimated the SFE and the star formation rate (SFR) within subregions of the W43-MM1 ridge. Results: The high SFE found in the ridge ($\sim$6% enclosed in $\sim$8 pc$^3$) confirms its ability to form a starburst cluster. There is however a clear lack of dense cores in the northern part of the ridge, which may be currently assembling. The CFE and the SFE are observed to increase with volume gas density while the SFR steeply decreases with the virial parameter, $\alpha_{vir}$. Statistical models of the SFR may well describe the outskirts of the W43-MM1 ridge but struggle to reproduce its inner part, which corresponds to measurements at low $\alpha_{vir}$. It may be that ridges do not follow the log-normal density distribution, Larson relations, and stationary conditions forced in the statistical SFR models.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enThe W43-MM1 mini-starburst ridge, a test for star formation efficiency models
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201423603
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1404.4843
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A15
bordeaux.volume570
bordeaux.peerReviewedoui
hal.identifierhal-00981326
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00981326v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2014&rft.volume=570&rft.spage=id.A15&rft.epage=id.A15&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=LOUVET,%20Fabien&MOTTE,%20Fr%C3%A9d%C3%A9rique&HENNEBELLE,%20Patrick&BONNELL,%20Ian&BONTEMPS,%20Sylvain&rft.genre=article


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