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Deuterium Abundance in the Local ISM

Published online by Cambridge University Press:  19 July 2016

Jeffrey L. Linsky  and
Brian E. Wood
Jeffrey L. Linsky
Affiliation:
JILA, Univ. of Colorado and NIST, Boulder, CO 80309-0440 USA
Brian E. Wood
Affiliation:
JILA, Univ. of Colorado and NIST, Boulder, CO 80309-0440 USA

Abstract

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Excellent HST/GHRS spectra of interstellar hydrogen and deuterium Lyman-α 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 10−5 with all data points lying within ±1σ of the mean. Deciding whether or not the D/H ratio has different values elsewhere in the Galaxy and beyond will be one of the major objectives of the FUSE mission.

Type
Conference Papers in order of Presentation
Information
Symposium - International Astronomical Union , Volume 187: Cosmic Chemical Evolution , 2002 , pp. 75 - 79
Copyright
Copyright © 2002 

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