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Far-infrared molecular lines from Low- to High-Mass Star Forming Regions observed with Herschel

hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorKARSKA, A.
hal.structure.identifierFORMATION STELLAIRE 2014
dc.contributor.authorHERPIN, Fabrice
hal.structure.identifierMax-Planck-Institut für Extraterrestrische Physik [MPE]
dc.contributor.authorBRUDERER, S.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorGOICOECHEA, J. R.
hal.structure.identifierMax-Planck-Institut für Extraterrestrische Physik [MPE]
dc.contributor.authorHERCZEG, G. J.
hal.structure.identifierMax-Planck-Institut für Extraterrestrische Physik [MPE]
hal.structure.identifierLeiden Observatory [Leiden]
dc.contributor.authorVAN DISHOECK, E. F.
dc.contributor.authorJOSÉ-GARCÍA, I. San
dc.contributor.authorCONTURSI, A.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorFEUCHTGRUBER, H.
dc.contributor.authorFEDELE, D.
hal.structure.identifierFORMATION STELLAIRE 2014
dc.contributor.authorBAUDRY, Alain
hal.structure.identifierFORMATION STELLAIRE 2014
dc.contributor.authorBRAINE, J.
dc.contributor.authorCHAVARRIA, L.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorCERNICHARO, J.
hal.structure.identifierSRON Netherlands Institute for Space Research [SRON]
dc.contributor.authorVAN DER TAK, F. F. S.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorWYROWSKI, F.
dc.date.issued2014
dc.identifier.issn0004-6361
dc.description.abstractEn(Abridged) We study the response of the gas to energetic processes associated with high-mass star formation and compare it with studies on low- and intermediate-mass young stellar objects (YSOs) using the same methods. The far-IR line emission and absorption of CO, H$_2$O, OH, and [OI] reveals the excitation and the relative contribution of different species to the gas cooling budget. Herschel-PACS spectra covering 55-190 um are analyzed for ten high-mass star forming regions of various luminosities and evolutionary stages at spatial scales of ~10^4 AU. Radiative transfer models are used to determine the contribution of the envelope to the far-IR CO emission. The close environments of high-mass YSOs show strong far-IR emission from molecules, atoms, and ions. Water is detected in all 10 objects even up to high excitation lines. CO lines from J=14-13 up to typically 29-28 show a single temperature component, Trot~300 K. Typical H$_2$O temperatures are Trot~250 K, while OH has Trot~80 K. Far-IR line cooling is dominated by CO (~75 %) and to a smaller extent by OI (~20 %), which increases for the most evolved sources. H$_2$O is less important as a coolant for high-mass sources because many lines are in absorption. Emission from the envelope is responsible for ~45-85 % of the total CO luminosity in high-mass sources compared with only ~10 % for low-mass YSOs. The highest-J lines originate most likely from shocks, based on the strong correlation of CO and H$_2$O with physical parameters of the sources from low- to high-masses. Excitation of warm CO is very similar for all mass regimes, whereas H$_2$O temperatures are ~100 K higher for high-mass sources than the low-mass YSOs. Molecular cooling is ~4 times more important than cooling by [OI]. The total far-IR line luminosity is about 10$^{-3}$ and 10$^{-5}$ times lower than the dust luminosity for the low- and high-mass YSOs.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enFar-infrared molecular lines from Low- to High-Mass Star Forming Regions observed with Herschel
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201321954
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1311.6644
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A45
bordeaux.volume562
bordeaux.peerReviewedoui
hal.identifierhal-00944378
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00944378v1
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