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Deuterium Abundance in the Local ISM and Possible Spatial VariationsExcellent HST/GHRS spectra of interstellar hydrogen and deuterium Lyman-(alpha) absorption toward nearby stars allow us to identify systematic errors that have plagued earlier work and to measure accurate values of the D/H ratio in local interstellar gas. Analysis of 12 sightlines through the Local Interstellar Cloud leads to a mean value of D/H = (1.50 +/- 0.10) x 10(exp -5) with all data points lying within +/- l(delta) of the mean. Whether or not the D/H ratio has different values elsewhere in the Galaxy and beyond is a very important open question that will be one of the major objectives of the Far Ultraviolet Spectroscopic Explorer (FUSE) mission.
Document ID
19990032209
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Linsky, Jeffrey L. (Colorado Univ. Boulder, CO United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Space Science Reviews
Publisher: Kluwer Academic Publishers
Volume: 84
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NASA Order S-56460-D
Distribution Limits
Public
Copyright
Public Use Permitted.

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