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The Distribution of Deuterium in the ISM: One Nucleon is Never Enough

Phillips, T. G. and Lis, D. C. (2006) The Distribution of Deuterium in the ISM: One Nucleon is Never Enough. In: Revealing the Molecular Universe: One Antenna Is Never Enough. ASP Conference Series. No.356. Astronomical Society of the Pacific , San Francisco, CA, pp. 223-231. ISBN 978-1-583812-24-2.

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The tendency for deuterium to be concentrated into the cold dense regions of the galaxy is due to the lower ground state energy of the heavier molecules. Such chemical fractionation leads to [D/H] values as high as 1! In turn this allows the detection of species such as ND_3, H_2D^+ and D_2H^+. The fraction of the interstellar medium (ISM) with such large deuteration is hard to estimate, but may be sufficient to cause both spatially variable and generally low [D/H] values in the diffuse ISM.

Item Type:Book Section
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Lis, D. C.0000-0002-0500-4700
Additional Information:© 2006 Astronomical Society of the Pacific. This research has been supported by the NSF grant AST 22-09008 to the Caltech Submillimeter Observatory.
Funding AgencyGrant Number
NSFAST 22-09008
Series Name:ASP Conference Series
Issue or Number:356
Record Number:CaltechAUTHORS:20110623-132215867
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24185
Deposited By: Tony Diaz
Deposited On:23 Jun 2011 21:08
Last Modified:03 Oct 2019 02:54

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