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The earliest phases of high-mass star formation, as seen in NGC 6334 by Herschel-HOBYS
dc.contributor.author | TIGÉ, J. | |
hal.structure.identifier | Sciences pour l'environnement [SPE] | |
dc.contributor.author | MOTTE, F. | |
hal.structure.identifier | Laboratoire d'Astrophysique de Marseille [LAM] | |
dc.contributor.author | RUSSEIL, D. | |
hal.structure.identifier | Laboratoire d'Astrophysique de Marseille [LAM] | |
dc.contributor.author | ZAVAGNO, Annie | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | HENNEMANN, M. | |
hal.structure.identifier | Laboratory for Atmospheric and Space Physics [Boulder] [LASP] | |
dc.contributor.author | SCHNEIDER, N. | |
dc.contributor.author | HILL, T. | |
dc.contributor.author | LUONG, Q. Nguyen | |
hal.structure.identifier | Herzberg Institute of Astrophysics | |
dc.contributor.author | DI FRANCESCO, J. | |
hal.structure.identifier | FORMATION STELLAIRE 2017 | |
dc.contributor.author | BONTEMPS, Sylvain | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | LOUVET, F. | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | DIDELON, P. | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | KONYVES, V. | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | ANDRÉ, Ph. | |
dc.contributor.author | LEULEU, G. | |
dc.contributor.author | BARDAGI, J. | |
dc.contributor.author | ANDERSON, L. D. | |
hal.structure.identifier | Institut d'astrophysique spatiale [IAS] | |
dc.contributor.author | ARZOUMANIAN, D. | |
hal.structure.identifier | Istituto di Astrofisica e Planetologia Spaziali - INAF [IAPS] | |
dc.contributor.author | BENEDETTINI, M. | |
dc.contributor.author | BERNARD, J. | |
hal.structure.identifier | Istituto di Astrofisica e Planetologia Spaziali - INAF [IAPS] | |
dc.contributor.author | ELIA, D. | |
hal.structure.identifier | Centro de Matemática e Aplicações Fundamentais [CMAF] | |
dc.contributor.author | FIGUEIRA, M. | |
dc.contributor.author | KIRK, J. | |
dc.contributor.author | MARTIN, P. G. | |
dc.contributor.author | MINIER, V. | |
hal.structure.identifier | Istituto di Fisica dello Spazio Interplanetario [IFSI] | |
dc.contributor.author | MOLINARI, S. | |
dc.contributor.author | NONY, T. | |
dc.contributor.author | PERSI, P. | |
hal.structure.identifier | Faculty of Informatics [Lugano] | |
dc.contributor.author | PEZZUTO, S. | |
dc.contributor.author | POLYCHRONI, D. | |
hal.structure.identifier | School of Physics and Astronomy [Cardiff] | |
dc.contributor.author | RAYNER, T. | |
dc.contributor.author | RIVERA-INGRAHAM, A. | |
hal.structure.identifier | Institut d'Astrophysique de Paris [IAP] | |
dc.contributor.author | ROUSSEL, H. | |
dc.contributor.author | RYGL, K. | |
hal.structure.identifier | Antarctic Research a European Network for Astrophysics [ARENA] | |
dc.contributor.author | SPINOGLIO, L. | |
hal.structure.identifier | Engineering Department | |
dc.contributor.author | WHITE, G. J. | |
dc.date.issued | 2017 | |
dc.identifier.issn | 0004-6361 | |
dc.description.abstractEn | Aims. To constrain models of high-mass star formation, the Herschel-HOBYS key program aims at discovering massive dense cores (MDCs) able to host the high-mass analogs of low-mass prestellar cores, which have been searched for over the past decade. We here focus on NGC 6334, one of the best-studied HOBYS molecular cloud complexes.Methods. We used Herschel/PACS and SPIRE 70−500 μm images of the NGC 6334 complex complemented with (sub)millimeter and mid-infrared data. We built a complete procedure to extract ~0.1 pc dense cores with the getsources software, which simultaneously measures their far-infrared to millimeter fluxes. We carefully estimated the temperatures and masses of these dense cores from their spectral energy distributions (SEDs). We also identified the densest pc-scale cloud structures of NGC 6334, one 2 pc × 1 pc ridge and two 0.8 pc × 0.8 pc hubs, with volume-averaged densities of ~105 cm-3. Results. A cross-correlation with high-mass star formation signposts suggests a mass threshold of 75 M⊙ for MDCs in NGC 6334. MDCs have temperatures of 9.5−40 K, masses of 75−1000 M⊙, and densities of 1 × 105−7 × 107 cm-3. Their mid-infrared emission is used to separate 6 IR-bright and 10 IR-quiet protostellar MDCs while their 70 μm emission strength, with respect to fitted SEDs, helps identify 16 starless MDC candidates. The ability of the latter to host high-mass prestellar cores is investigated here and remains questionable. An increase in mass and density from the starless to the IR-quiet and IR-bright phases suggests that the protostars and MDCs simultaneously grow in mass. The statistical lifetimes of the high-mass prestellar and protostellar core phases, estimated to be 1−7 × 104 yr and at most 3 × 105 yr respectively, suggest a dynamical scenario of high-mass star formation.Conclusions. The present study provides good mass estimates for a statistically significant sample, covering the earliest phases of high-mass star formation. High-mass prestellar cores may not exist in NGC 6334, favoring a scenario presented here, which simultaneously forms clouds, ridges, MDCs, and high-mass protostars. | |
dc.description.sponsorship | Etoiles Proto-OB : recherche systématique dans notre Galaxie des cibles pour ALMA | |
dc.language.iso | en | |
dc.publisher | EDP Sciences | |
dc.subject.en | dust | |
dc.subject.en | extinction | |
dc.subject.en | ISM: clouds | |
dc.subject.en | stars: formation | |
dc.subject.en | submillimeter: ISM | |
dc.subject.en | stars: protostars | |
dc.subject.en | ISM: individual objects: NGC 6334 | |
dc.title.en | The earliest phases of high-mass star formation, as seen in NGC 6334 by Herschel-HOBYS | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1051/0004-6361/201628989 | |
dc.subject.hal | Physique [physics]/Astrophysique [astro-ph] | |
dc.identifier.arxiv | 1703.09839 | |
bordeaux.journal | Astronomy and Astrophysics - A&A | |
bordeaux.page | A77 | |
bordeaux.volume | 602 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-01500414 | |
hal.version | 1 | |
hal.invited | non | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-01500414v1 | |
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