CASELLI, P.; KETO, E.; PAGANI, L.; AIKAWA, Y.; YILDIZ, U. A.; VAN DER TAK, F. F. S.; TAFALLA, M.; BERGIN, E. A.; NISINI, B.; CODELLA, C.; VAN DISHOECK, E. F.; BACHILLER, R.; BAUDRY, Alain; BENEDETTINI, M.; BENZ, A. O.; BJERKELI, P.; BLAKE, G. A.; BONTEMPS, Sylvain; BRAINE, J.; BRUDERER, S.; CERNICHARO, J.; DANIEL, F.; DI GIORGIO, A. M.; DOMINIK, C.; DOTY, S. D.; ENCRENAZ, P.; FICH, M.; FUENTE, A.; GAIER, T.; GIANNINI, T.; GOICOECHEA, J. R.; DE GRAAUW, Th.; HELMICH, F.; HERCZEG, G. J.; HERPIN, Fabrice; HOGERHEIJDE, M. R.; JACKSON, B.; JACQ, T.; JAVADI, H.; JOHNSTONE, D.; JORGENSEN, J. K.; KESTER, D.; KRISTENSEN, L. E.; LAAUWEN, W.; LARSSON, B.; LIS, D.; LISEAU, R.; LUINGE, W.; MARSEILLE, M.; MCCOEY, C.; MEGEJ, A.; MELNICK, G.; NEUFELD, D.; OLBERG, M.; PARISE, B.; PEARSON, J. C.; PLUME, R.; RISACHER, C.; SANTIAGO-GARCIA, J.; SARACENO, P.; SHIPMAN, R.; SIEGEL, P.; VAN KEMPEN, T. A.; VISSER, R.; WAMPFLER, S. F.; WYROWSKI, F.

doi:10.1051/0004-6361/201015097

hal.structure.identifier	INAF - Osservatorio Astrofisico di Arcetri [OAA]
dc.contributor.author	CASELLI, P.
dc.contributor.author	KETO, E.
hal.structure.identifier	Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.author	PAGANI, L.
dc.contributor.author	AIKAWA, Y.
dc.contributor.author	YILDIZ, U. A.
hal.structure.identifier	Kapteyn Astronomical Institute [Groningen]
dc.contributor.author	VAN DER TAK, F. F. S.
dc.contributor.author	TAFALLA, M.
hal.structure.identifier	Harvard-Smithsonian Center for Astrophysics [CfA]
dc.contributor.author	BERGIN, E. A.
hal.structure.identifier	INAF - Osservatorio Astronomico di Roma [OAR]
dc.contributor.author	NISINI, B.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	CODELLA, C.
dc.contributor.author	VAN DISHOECK, E. F.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	BACHILLER, R.
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.author	BAUDRY, Alain
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	BENEDETTINI, M.
dc.contributor.author	BENZ, A. O.
dc.contributor.author	BJERKELI, P.
hal.structure.identifier	LabOratoire proCédés énergIe bâtimEnt [LOCIE]
dc.contributor.author	BLAKE, G. A.
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.author	BONTEMPS, Sylvain
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.author	BRAINE, J.
dc.contributor.author	BRUDERER, S.
hal.structure.identifier	Centro de Investigaciones Biológicas [CSIC]
dc.contributor.author	CERNICHARO, J.
dc.contributor.author	DANIEL, F.
dc.contributor.author	DI GIORGIO, A. M.
hal.structure.identifier	Astronomical Institute Anton Pannekoek [AI PANNEKOEK]
dc.contributor.author	DOMINIK, C.
dc.contributor.author	DOTY, S. D.
hal.structure.identifier	Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.author	ENCRENAZ, P.
dc.contributor.author	FICH, M.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	FUENTE, A.
dc.contributor.author	GAIER, T.
dc.contributor.author	GIANNINI, T.
hal.structure.identifier	Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.author	GOICOECHEA, J. R.
dc.contributor.author	DE GRAAUW, Th.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	HELMICH, F.
dc.contributor.author	HERCZEG, G. J.
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.author	HERPIN, Fabrice
dc.contributor.author	HOGERHEIJDE, M. R.
dc.contributor.author	JACKSON, B.
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
dc.contributor.author	JACQ, T.
dc.contributor.author	JAVADI, H.
dc.contributor.author	JOHNSTONE, D.
dc.contributor.author	JORGENSEN, J. K.
dc.contributor.author	KESTER, D.
dc.contributor.author	KRISTENSEN, L. E.
dc.contributor.author	LAAUWEN, W.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	LARSSON, B.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	LIS, D.
dc.contributor.author	LISEAU, R.
dc.contributor.author	LUINGE, W.
hal.structure.identifier	Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifier	Observatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifier	Université Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifier	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifier	SRON Netherlands Institute for Space Research [SRON]
dc.contributor.author	MARSEILLE, M.
dc.contributor.author	MCCOEY, C.
dc.contributor.author	MEGEJ, A.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	MELNICK, G.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	NEUFELD, D.
hal.structure.identifier	Onsala Space Observatory
dc.contributor.author	OLBERG, M.
hal.structure.identifier	Centre d'étude spatiale des rayonnements [CESR]
dc.contributor.author	PARISE, B.
dc.contributor.author	PEARSON, J. C.
dc.contributor.author	PLUME, R.
hal.structure.identifier	ESO
dc.contributor.author	RISACHER, C.
dc.contributor.author	SANTIAGO-GARCIA, J.
hal.structure.identifier	Istituto di Fisica dello Spazio Interplanetario [IFSI]
dc.contributor.author	SARACENO, P.
dc.contributor.author	SHIPMAN, R.
hal.structure.identifier	Laboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.author	SIEGEL, P.
dc.contributor.author	VAN KEMPEN, T. A.
dc.contributor.author	VISSER, R.
dc.contributor.author	WAMPFLER, S. F.
hal.structure.identifier	Max-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.author	WYROWSKI, F.
dc.date.created	2010
dc.date.issued	2010
dc.identifier.issn	0004-6361
dc.description.abstractEn	SWAS and Odin provided stringent upper limits on the gas phase water abundance of dark clouds (x(H2O) < 7x10^-9). We investigate the chemistry of water vapor in starless cores beyond the previous upper limits using the highly improved angular resolution and sensitivity of Herschel and measure the abundance of water vapor during evolutionary stages just preceding star formation. High spectral resolution observations of the fundamental ortho water (o-H2O) transition (557 GHz) were carried out with Herschel HIFI toward two starless cores: B68, a Bok globule, and L1544, a prestellar core embedded in the Taurus molecular cloud complex. The rms in the brightness temperature measured for the B68 and L1544 spectra is 2.0 and 2.2 mK, respectively, in a velocity bin of 0.59 km s^-1. The continuum level is 3.5+/-0.2 mK in B68 and 11.4+/-0.4 mK in L1544. No significant feature is detected in B68 and the 3 sigma upper limit is consistent with a column density of o-H2O N(o-H2O) < 2.5x10^13 cm^-2, or a fractional abundance x(o-H2O) < 1.3x10^-9, more than an order of magnitude lower than the SWAS upper limit on this source. The L1544 spectrum shows an absorption feature at a 5 sigma level from which we obtain the first value of the o-H2O column density ever measured in dark clouds: N(o-H2O) = (8+/-4)x10^12 cm^-2. The corresponding fractional abundance is x(o-H2O) ~ 5x10^-9 at radii > 7000 AU and ~2x10^-10 toward the center. The radiative transfer analysis shows that this is consistent with a x(o-H2O) profile peaking at ~10^-8, 0.1 pc away from the core center, where both freeze-out and photodissociation are negligible. Herschel has provided the first measurement of water vapor in dark regions. Prestellar cores such as L1544 (with their high central densities, strong continuum, and large envelopes) are very promising tools to finally shed light on the solid/vapor balance of water in molecular clouds.
dc.language.iso	en
dc.publisher	EDP Sciences
dc.subject.en	Astrophysics
dc.subject.en	Galaxy Astrophysics
dc.title.en	Water vapor toward starless cores: the Herschel view
dc.type	Article de revue
dc.identifier.doi	10.1051/0004-6361/201015097
dc.subject.hal	Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.hal	Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv	1007.1248
bordeaux.journal	Astronomy and Astrophysics - A&A
bordeaux.page	L29
bordeaux.volume	521
bordeaux.peerReviewed	oui
hal.identifier	hal-00521407
hal.version	1
hal.popular	non
hal.audience	Internationale
hal.origin.link	https://hal.archives-ouvertes.fr//hal-00521407v1
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=2010&rft.volume=521&rft.spage=L29&rft.epage=L29&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=CASELLI,%20P.&KETO,%20E.&PAGANI,%20L.&AIKAWA,%20Y.&YILDIZ,%20U.%20A.&rft.genre=article

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Water vapor toward starless cores: the Herschel view

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