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The formation of active protoclusters in the Aquila Rift: A millimeter continuum view

hal.structure.identifierDépartement d'Astrophysique (ex SAP) [DAP]
dc.contributor.authorMAURY, Anaelle
hal.structure.identifierRecherche en épidémiologie et biostatistique
dc.contributor.authorANDRE, Philippe
dc.contributor.authorMEN'SHCHIKOV, Alexander
dc.contributor.authorKONYVES, Vera
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.authorBONTEMPS, Sylvain
dc.date.created2011-08-31
dc.date.issued2011
dc.identifier.issn0004-6361
dc.description.abstractEnAbridged -- We present an analysis of the Aquila Rift complex which addresses the questions of the star formation rate (SFR), star formation efficiency (SFE) and typical lifetime of the Class 0 protostellar phase in two nearby cluster-forming clumps: the Serpens South and W40 protoclusters. We carried out a 1.2 mm dust continuum mapping of the Aquila Rift complex with the MAMBO bolometer array on the IRAM 30m telescope. We perform a systematic source extraction in our millimeter continuum map. Based on complementary data from the Herschel Gould Belt survey and Spitzer maps, we characterize the SEDs of the 77 mm continuum sources detected with MAMBO and estimate their evolutionary stages. Taking advantage of the comprehensive dataset available for the Serpens South region, spanning wavelengths from 2 microns to 1.2 mm, we estimate the numbers of young stellar objects (YSOs) at different evolutionary stages and find a ratio of Class 0 to Class I protostars N(0)/N(I)=0.19-0.27. This low ratio supports a scenario of relatively fast accretion at the beginning of the protostellar phase, and leads to a Class 0 lifetime of ~4-9x10^{4} yr. We also show that both the Serpens South and W40 protoclusters are characterized by large fractions of protostars and high SFRs ~20-50 Msun.Myr^{-1}pc^{-2}, in agreement with the idea that these two nearby clumps are active sites of clustered star formation currently undergoing bursts of star formation, and have the potential ability to form bound star clusters. While the formation of these two protoclusters is likely to have been initiated in a very different manner, the resulting protostellar populations are observed to be very similar. This suggests that after the onset of gravitational collapse, the detailed manner in which the collapse has been initiated does not affect much the ability of a clump to form stars.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enThe formation of active protoclusters in the Aquila Rift: A millimeter continuum view
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201117132
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1108.0668
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A77
bordeaux.volume535
bordeaux.peerReviewedoui
hal.identifierhal-00620144
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00620144v1
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