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Detection of the Water Reservoir in a Forming Planetary System

Hogerheijde, Michiel R. and Bergin, Edwin A. and Brinch, Christian and Cleeves, L. Ilsedore and Fogel, Jeffrey K. J. and Blake, Geoffrey A. and Dominik, Carsten and Lis, Dariusz C. and Melnick, Gary and Neufeld, David and Panić, Olja and Pearson, John C. and Kristensen, Lars and Yildiz, Umut A. and van Dishoeck, Ewine F. (2011) Detection of the Water Reservoir in a Forming Planetary System. Science, 334 (6054). pp. 338-340. ISSN 0036-8075.

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Icy bodies may have delivered the oceans to the early Earth, yet little is known about water in the ice-dominated regions of extrasolar planet-forming disks. The Heterodyne Instrument for the Far-Infrared on board the Herschel Space Observatory has detected emission lines from both spin isomers of cold water vapor from the disk around the young star TW Hydrae. This water vapor likely originates from ice-coated solids near the disk surface, hinting at a water ice reservoir equivalent to several thousand Earth oceans in mass. The water’s ortho-to-para ratio falls well below that of solar system comets, suggesting that comets contain heterogeneous ice mixtures collected across the entire solar nebula during the early stages of planetary birth.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bergin, Edwin A.0000-0003-4179-6394
Cleeves, L. Ilsedore0000-0003-2076-8001
Blake, Geoffrey A.0000-0003-0787-1610
Lis, Dariusz C.0000-0002-0500-4700
Neufeld, David0000-0001-8341-1646
van Dishoeck, Ewine F.0000-0001-7591-1907
Additional Information:© 2011 by the American Association for the Advancement of Science. Received for publication 25 May 2011. Accepted for publication 20 September 2011. Herschel is a European Space Agency space observatory with science instruments provided by European-led principal investigator consortia and with important participation from NASA. This work was partially supported by Nederlandse Organisatie voor Wetenschappelijk Onderzoek grant 639.042.404, NSF grant 0707777, and, as part of the NASA Herschel HIFI guaranteed time program, NASA. The data presented here are archived at the Herschel Science Archive,, under OBSID 1342198337 and 1342201585
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)639.042.404
Issue or Number:6054
Record Number:CaltechAUTHORS:20111116-073151448
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Official Citation:Detection of the Water Reservoir in a Forming Planetary System Michiel R. Hogerheijde, Edwin A. Bergin, Christian Brinch, L. Ilsedore Cleeves, Jeffrey K. J. Fogel, Geoffrey A. Blake, Carsten Dominik, Dariusz C. Lis, Gary Melnick, David Neufeld, Olja Panić, John C. Pearson, Lars Kristensen, Umut A. Yıldız, and Ewine F. van Dishoeck Science 21 October 2011: 338-340.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27793
Deposited By: Ruth Sustaita
Deposited On:16 Nov 2011 16:06
Last Modified:09 Mar 2020 13:19

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