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Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk

Bergin, E. A. and Bell, T. A. and Blake, G. A. and Lis, D. (2010) Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk. Astronomy and Astrophysics, 521 . Art. No. L33. ISSN 0004-6361.

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We performed a sensitive search for the ground-state emission lines of ortho- and para-water vapor in the DM Tau protoplanetary disk using the Herschel/HIFI instrument. No strong lines are detected down to 3σ levels in 0.5 km s^(−1) channels of 4.2 mK for the 1_(10)–1_(01) line and 12.6 mK for the 1_(11)−0_(00) line. We report a very tentative detection, however, of the 1_(10)–1_(01) line in the wide band spectrometer, with a strength of T_(mb) = 2.7 mK, a width of 5.6 km s^(−1) and an integrated intensity of 16.0 mK km s^(−1). The latter constitutes a 6σ detection. Regardless of the reality of this tentative detection, model calculations indicate that our sensitive limits on the line strengths preclude efficient desorption of water in the UV illuminated regions of the disk. We hypothesize that more than 95−99% of the water ice is locked up in coagulated grains that have settled to the midplane.

Item Type:Article
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URLURL TypeDescription
Bergin, E. A.0000-0003-4179-6394
Blake, G. A.0000-0003-0787-1610
Lis, D.0000-0002-0500-4700
Additional Information:© 2010 ESO. Received 31 May 2010, Accepted 26 June 2010, Published online 01 October 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with participation important from NASA. HIFI has been designed and built by a consortium of institutes and university departments from across Europe, Canada and the United States under the leadership of SRON Netherlands Institute for Space Research, Groningen, The Netherlands and with major contributions from Germany, France and the US. Consortium members are: Canada: CSA, U. Waterloo; France: CESR, LAB, LERMA, IRAM; Germany: KOSMA, MPIfR, MPS; Ireland, NUI Maynooth; Italy: ASI, IFSI-INAF, Osservatorio Astrofisico di Arcetri- INAF; Netherlands: SRON, TUD; Poland: CAMK, CBK; Spain: Observatorio Astronómico Nacional (IGN), Centro de Astrobiología (CSIC-INTA). Sweden: Chalmers University of Technology - MC2, RSS & GARD; Onsala Space Observatory; Swedish National Space Board, Stockholm University - Stockholm Observatory; Switzerland: ETH Zurich, FHNW; USA: Caltech, JPL, NHSC. Support for this work was provided by NASA through an award issued by JPL/Caltech. E.A.B. acknowledges support by NSF Grant 0707777, M.R.H. by NWO grant 639.042.404.
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)639.042.404
Subject Keywords:ISM: abundances – ISM: molecules – protoplanetary disks
Record Number:CaltechAUTHORS:20101221-091929326
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Official Citation:Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk E. A. Bergin, M. R. Hogerheijde, C. Brinch, J. Fogel, U. A. Yıldız, L. E. Kristensen, E. F. van Dishoeck, T. A. Bell, G. A. Blake, J. Cernicharo, C. Dominik, D. Lis, G. Melnick, D. Neufeld, O. Panić, J. C. Pearson, R. Bachiller, A. Baudry, M. Benedettini, A. O. Benz, P. Bjerkeli, S. Bontemps, J. Braine, S. Bruderer, P. Caselli, C. Codella, F. Daniel, A. M. di Giorgio, S. D. Doty, P. Encrenaz, M. Fich, A. Fuente, T. Giannini, J. R. Goicoechea, Th. de Graauw, F. Helmich, G. J. Herczeg, F. Herpin, T. Jacq, D. Johnstone, J. K. Jørgensen, B. Larsson, R. Liseau, M. Marseille, C. Mc Coey, B. Nisini, M. Olberg, B. Parise, R. Plume, C. Risacher, J. Santiago-García, P. Saraceno, R. Shipman, M. Tafalla, T. A. van Kempen, R. Visser, S. F. Wampfler, F. Wyrowski, F. van der Tak, W. Jellema, A. G. G. M. Tielens, P. Hartogh, J. Stützki and R. Szczerba A&A 521 L33 (2010) DOI: 10.1051/0004-6361/201015104
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21470
Deposited By: Benjamin Perez
Deposited On:21 Dec 2010 17:55
Last Modified:09 Mar 2020 13:18

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