DIDELON, P.,; MOTTE, F.,; TREMBLIN, Pascal; HILL, T.,; HONY, S.,; HENNEMANN, M.; HENNEBELLE, P.,; ANDERSON, L. D.,; GALLIANO, F.,; SCHNEIDER, N.,; RAYNER, T.,; RYGL, K.,; LOUVET, François; ZAVAGNO, Annie; KONYVES, V.,; SAUVAGE, M.,; ANDRE, Ph.,; BONTEMPS, Sylvain; PERETTO, N.,; GRIFFIN, M.,; GONZALEZ, M.,; LEBOUTEILLER, V.,; ARZOUMANIAN, D.,; BERNARD, J.-P.,; BENEDETTINI, M.,; DI FRANCESCO, J.,; MENSHCHIKOV, A.,; MINIER, Vincent; NGUYEN LUONG, Q.,; PALMEIRIM, P.,; RIVERA-INGRAHAM, A.,; PEZZUTO, S.,; RUSSEIL, D.,; WARD-THOMPSON, D.,; WHITE, G. J.,

doi:10.1051/0004-6361/201526239

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	MOTTE, F.,
hal.structure.identifier	University of Exeter
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifier	Maison de la Simulation [MDLS]
dc.contributor.author	TREMBLIN, Pascal
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifier	Joint ALMA Office
dc.contributor.author	HILL, T.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	HONY, S.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	HENNEMANN, M.
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifier	Département d'Astrophysique (ex SAP) [DAP]
dc.contributor.author	HENNEBELLE, P.,
hal.structure.identifier	National Radio Astronomy Observatory [NRAO]
dc.contributor.author	ANDERSON, L. D.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	GALLIANO, F.,
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	SCHNEIDER, N.,
hal.structure.identifier	School of Physics and Astronomy [Cardiff]
dc.contributor.author	RAYNER, T.,
hal.structure.identifier	European Space Research and Technology Centre [ESTEC]
dc.contributor.author	RYGL, K.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	LOUVET, François
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	KONYVES, V.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	SAUVAGE, M.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	ANDRE, Ph.,
hal.structure.identifier	FORMATION STELLAIRE 2015
dc.contributor.author	BONTEMPS, Sylvain
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifier	School of Physics and Astronomy [Cardiff]
dc.contributor.author	PERETTO, N.,
hal.structure.identifier	School of Physics and Astronomy [Cardiff]
dc.contributor.author	GRIFFIN, M.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	GONZALEZ, M.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	LEBOUTEILLER, V.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	ARZOUMANIAN, D.,
hal.structure.identifier	Centre d'étude spatiale des rayonnements [CESR]
dc.contributor.author	BERNARD, J.-P.,
hal.structure.identifier	Istituto di Astrofisica e Planetologia Spaziali - INAF [IAPS]
dc.contributor.author	BENEDETTINI, M.,
hal.structure.identifier	National Research Council of Canada [NRC]
dc.contributor.author	DI FRANCESCO, J.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	MENSHCHIKOV, A.,
dc.contributor.author	MINIER, Vincent
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.author	NGUYEN LUONG, Q.,
hal.structure.identifier	Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
hal.structure.identifier	Département d'Astrophysique (ex SAP) [DAP]
dc.contributor.author	PALMEIRIM, P.,
hal.structure.identifier	Institut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.author	RIVERA-INGRAHAM, A.,
hal.structure.identifier	Istituto di Astrofisica e Planetologia Spaziali - INAF [IAPS]
dc.contributor.author	PEZZUTO, S.,
hal.structure.identifier	Laboratoire d'Astrophysique de Marseille [LAM]
dc.contributor.author	RUSSEIL, D.,
hal.structure.identifier	Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy [Preston]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
dc.contributor.author	WARD-THOMPSON, D.,
hal.structure.identifier	STFC Rutherford Appleton Laboratory [RAL]
dc.contributor.author	WHITE, G. J.,
dc.date.issued	2015
dc.identifier.issn	0004-6361
dc.description.abstractEn	The surroundings of HII regions can have a profound influence on their development, morphology, and evolution. This paper explores the effect of the environment on H II regions in the MonR2 molecular cloud. We aim to investigate the density structure of envelopes surrounding HII regions and to determine their collapse and ionisation expansion ages. The Mon R2 molecular cloud is an ideal target since it hosts an H II region association. Column density and temperature images derived from Herschel data were used together to model the structure of HII bubbles and their surrounding envelopes. The resulting observational constraints were used to follow the development of the Mon R2 ionised regions with analytical calculations and numerical simulations. The four hot bubbles associated with H II regions are surrounded by dense, cold, and neutral gas envelopes. The radial density profiles are reminiscent of those of low-mass protostellar envelopes. The inner parts of envelopes of all four HII regions could be free-falling because they display shallow density profiles. As for their outer parts, the two compact HII regions show a density profile, which is typical of the equilibrium structure of an isothermal sphere. In contrast, the central UCHii region shows a steeper outer profile, that could be interpreted as material being forced to collapse. The size of the heated bubbles, the spectral type of the irradiating stars, and the mean initial neutral gas density are used to estimate the ionisation expansion time, texp, 0.1Myr,for the dense UCHII and compact HII regions and 0.35 Myr for the extended HII region. The envelope transition radii between the shallow and steeper density profiles are used to estimate the time elapsed since the formation of the first proto stellar embryo, Tinf : 1Myr, for the ultra-compact, 1.5 / 3Myr for the compact, and greater than 6Myr for the extended HII regions.
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	Astrophysics - Astrophysics of Galaxies
dc.subject.en	Astrophysics - Solar and Stellar Astrophysics
dc.title.en	From forced collapse to H ii region expansion in Mon R2: Envelope density structure and age determination with Herschel
dc.type	Article de revue
dc.identifier.doi	10.1051/0004-6361/201526239
dc.subject.hal	Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.identifier.arxiv	1510.09175
bordeaux.journal	Astronomy and Astrophysics - A&A
bordeaux.page	id.A4
bordeaux.volume	584
bordeaux.peerReviewed	oui
hal.identifier	hal-01225735
hal.version	1
hal.popular	non
hal.audience	Internationale
hal.origin.link	https://hal.archives-ouvertes.fr//hal-01225735v1
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=2015&rft.volume=584&rft.spage=id.A4&rft.epage=id.A4&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=DIDELON,%20P.,&MOTTE,%20F.,&TREMBLIN,%20Pascal&HILL,%20T.,&HONY,%20S.,&rft.genre=article

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From forced collapse to H ii region expansion in Mon R2: Envelope density structure and age determination with Herschel

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