Roueff, E. and Herbst, E. and Lis, D. C. and Phillips, T. G. (2007) The effect of an increased elemental D/H ratio on deuterium fractionation in the cold interstellar medium. Astrophysical Journal Letters, 661 (2). L159-L162. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20091113-082358483
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Measurements using the Far Ultraviolet Spectroscopic Explorer (FUSE) show that the gas-phase D/H ratio in the solar neighborhood is highly variable and suggest that the elemental abundance of deuterium in the Galactic disk may be higher than previously thought. We investigate in this Letter the possible consequences of such an enhanced D/H ratio on the deuterium fractionation in singly and multiply deuterated molecules in cold, dense gas. We show that a modest increase in the elemental abundance of deuterium can lead to significant enhancements in abundances of multiply deuterated species.
|Additional Information:||© 2007 The American Astronomical Society. Received 2007 March 14; accepted 2007 April 16; published 2007 May 4. This research has been supported by NSF grant AST 22- 09008 to the Caltech Submillimeter Observatory and by NSF grant AST-0401168 to Ohio State University. D. C. L. and E. H. acknowledge support from the Observatoire de Paris during their stays in Meudon.|
|Subject Keywords:||galaxy : abundances; ISM : abundances; ISM : molecules|
|Official Citation:||The Effect of an Increased Elemental D/H Ratio on Deuterium Fractionation in the Cold Interstellar Medium E. Roueff, E. Herbst, D. C. Lis, and T. G. Phillips 2007 ApJ 661 L159-L162 doi: 10.1086/518863|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||25 Nov 2009 19:46|
|Last Modified:||26 Dec 2012 11:33|
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