The earliest phases of massive star formation within entire molecular cloud complexes
| dc.contributor.author | FRÉDÉRIQUE, Motte | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| dc.contributor.author | BONTEMPS, Sylvain | |
| dc.contributor.author | SCHILKE, P. | |
| dc.contributor.author | D. C., Lis | |
| dc.contributor.author | SCHNEIDER, N. | |
| dc.contributor.author | K. M., Menten | |
| dc.date.issued | 2005 | |
| dc.date.conference | 2005-05-16 | |
| dc.description.abstractEn | We started (sub-)millimeter continuum and line studies of entire molecular cloud complexes located at intermediate distances from the Sun (1-3 kpc). Such an unbiased approach allows to identify and characterize the earliest phases of high-mass stars overlooked by IRAS or MSX. Our complete MAMBO-2 surveys of the Cygnus X and NGC 7538 complexes reveal a large population of ˜ 0.1 pc-size massive young stellar objects (MYSOs) harboring high-mass infrared-quiet protostars. The determination of the nature of all the new millimeter sources is still in progress but we have already collected evidence that the infrared-quiet (or class 0-like) protostellar phase might last as long as the better-known infrared-bright protostellar phase. Besides, our complete census of MYSOs fails to discover the high-mass analogues of pre-stellar dense cores. We propose that the observed lower-density pre-stellar clumps ({>} 1 pc) rapidly concentrate and collapse as also found in the kinematical studies of other prominent clumps. Indeed, CS and HCO^+ mappings in W43 and Cygnus X suggest global supersonic contraction with inward velocities of several km s‑1 on parsec scales. Our work and similar studies of entire star-forming complexes will thus definitively contribute to a better knowledge of the earliest phases of high-mass star formation. | |
| dc.language.iso | en | |
| dc.source.title | IAU Symposium Proceedings of the international Astronomical Union 227 - 2005IAUS..227..151M | |
| dc.title.en | The earliest phases of massive star formation within entire molecular cloud complexes | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| bordeaux.page | 151-156 | |
| bordeaux.volume | 227 | |
| bordeaux.conference.title | Massive star birth: A crossroads of Astrophysics | |
| bordeaux.country | IT | |
| bordeaux.title.proceeding | IAU Symposium Proceedings of the international Astronomical Union 227 - 2005IAUS..227..151M | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00400812 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | oui | |
| hal.conference.end | 2005-05-20 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00400812v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=IAU%20Symposium%20Proceedings%20of%20the%20international%20Astronomical%20Union%20227%20-%202005IAUS..227..151M&rft.date=2005&rft.volume=227&rft.spage=151-156&rft.epage=151-156&rft.au=FR%C3%89D%C3%89RIQUE,%20Motte&BONTEMPS,%20Sylvain&SCHILKE,%20P.&D.%20C.,%20Lis&SCHNEIDER,%20N.&rft.genre=unknown |
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