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Growing evidence for a core formation threshold traced in Herschel Gould Belt survey clouds

dc.contributor.authorKÖNYVES, V.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorANDRÉ, Ph.
hal.structure.identifierFORMATION STELLAIRE 2013
dc.contributor.authorSCHNEIDER, N.
dc.contributor.authorPALMEIRIM, P.
dc.contributor.authorARZOUMANIAN, D.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorMEN'SHCHIKOV, A.
dc.date.issued2013-11
dc.identifier.issn0004-6337
dc.description.abstractEnIt has already been suggested that a threshold in column density - or in visual extinction - may need to be exceeded to form dense cores and then protostars. Based on Herschel Gould Belt survey results in the Aquila and Orion B molecular cloud complexes we observe clear connection between the locations of the detected prestellar cores and their background column density values. This finding appears to support a core formation scenario where such threshold corresponds to the extinction above which interstellar filaments become gravitationally unstable and fragment into cores. In these two actively star-forming regions we find the vast majority of the gravitationally bound prestellar cores above a high column density of about (6-7) × 1021 cm-2 (AV ˜ 6-7). This limit similarly appears in the column density probability distribution function (PDF) of the regions as well. The spatial distribution of the protostars and young stellar objects (YSOs) also shows a tight connection with the densest sites of both clouds, as more than 70 % of them appear above the mentioned AV thresholds. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enISM: clouds
dc.subject.enISM: individual (Aquila
dc.subject.enOrion B)
dc.subject.enstars: formation
dc.title.enGrowing evidence for a core formation threshold traced in Herschel Gould Belt survey clouds
dc.typeArticle de revue
dc.identifier.doi10.1002/ASNA.201211956
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]
bordeaux.journalAstronomical Notes / Astronomische Nachrichten
bordeaux.page908
bordeaux.volume334
bordeaux.peerReviewedoui
hal.identifierhal-00951168
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00951168v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomical%20Notes%20/%20Astronomische%20Nachrichten&rft.date=2013-11&rft.volume=334&rft.spage=908&rft.epage=908&rft.eissn=0004-6337&rft.issn=0004-6337&rft.au=K%C3%96NYVES,%20V.&ANDR%C3%89,%20Ph.&SCHNEIDER,%20N.&PALMEIRIM,%20P.&ARZOUMANIAN,%20D.&rft.genre=article


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