The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | MOTTE, Frédérique | |
hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
dc.contributor.author | BONTEMPS, Sylvain | |
hal.structure.identifier | Max-Planck-Institut für Radioastronomie [MPIFR] | |
dc.contributor.author | SCHILKE, P. | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | SCHNEIDER, N. | |
hal.structure.identifier | Max-Planck-Institut für Radioastronomie [MPIFR] | |
dc.contributor.author | M. MENTEN, K. | |
hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
dc.contributor.author | BROGUIÈRE, D. | |
dc.date.issued | 2007-12 | |
dc.identifier.issn | 0004-6361 | |
dc.description.abstractEn | We have made an extensive 1.2mm continuum mosaicing study of the Cygnus X molecular cloud complex using the MAMBO cameras at the IRAM 30 m telescope. We then compared our mm maps with mid-IR images, and have made SiO(2-1) follow-up observations of the best candidate progenitors of high-mass stars. Our complete study of Cygnus X provides, for the first time, an unbiased census of massive young stellar objects. We discover 129 massive dense cores, among which 42 are probable precursors of high-mass stars. Our study qualifies 17 cores as good candidates for hosting massive IR-quiet protostars, while up to 25 cores potentially host high-luminosity IR protostars. We fail to discover the high-mass analogs of pre-stellar dense cores in CygnusX, but find several massive starless clumps that might be gravitationally bound. Since our sample is derived from a single molecular complex and covers every embedded phase of high-mass star formation, it gives the first statistical estimates of their lifetime. In contrast to what is found for low-mass class 0 and class I phases, the IR-quiet protostellar phase of high-mass stars may last as long as their better-known high-luminosity IR phase. The statistical lifetimes of high-mass protostars and pre-stellar cores (~ 3 x 10^4 yr and < 10^3 yr) in Cygnus X are one and two order(s) of magnitude smaller, respectively, than what is found in nearby, low-mass star-forming regions. We therefore propose that high-mass pre-stellar and protostellar cores are in a highly dynamic state, as expected in a molecular cloud where turbulent processes dominate. | |
dc.language.iso | en | |
dc.publisher | EDP Sciences | |
dc.title.en | The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1051/0004-6361:20077843 | |
dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph] | |
dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
dc.identifier.arxiv | 0708.2774 | |
bordeaux.journal | Astronomy and Astrophysics - A&A | |
bordeaux.page | 1243-1260 | |
bordeaux.volume | 476 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-00167466 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Non spécifiée | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-00167466v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2007-12&rft.volume=476&rft.spage=1243-1260&rft.epage=1243-1260&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=MOTTE,%20Fr%C3%A9d%C3%A9rique&BONTEMPS,%20Sylvain&SCHILKE,%20P.&SCHNEIDER,%20N.&M.%20MENTEN,%20K.&rft.genre=article |
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