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Spatial Variations in the Atomic D/H Ratio in the ISM

Published online by Cambridge University Press:  25 May 2016

G. Sonneborn ,
E. B. Jenkins ,
T. Tripp ,
P. Wozniak ,
R. Ferlet ,
A. Vidal-Madjar  and
U.J. Sofia
G. Sonneborn
Affiliation:
NASA/Goddard Space Flight Center, Code 681, Greenbelt MD 20771 USA
E. B. Jenkins
Affiliation:
Princeton University Observatory, Princeton, NJ 08544) USA
T. Tripp
Affiliation:
Princeton University Observatory, Princeton, NJ 08544) USA
P. Wozniak
Affiliation:
Princeton University Observatory, Princeton, NJ 08544) USA
R. Ferlet
Affiliation:
IAP/CNRS, 98bis Blvd. Arago, 75014 Paris, France
A. Vidal-Madjar
Affiliation:
IAP/CNRS, 98bis Blvd. Arago, 75014 Paris, France
U.J. Sofia
Affiliation:
Dept. of Astronomy, Whitman College, Walla Walla, WA 99362, USA

Abstract

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Observations with IMAPS demonstrate that interstellar atomic D/H abundance ratios differ by a factor of 3 on the sightlines toward Δ Ori A, ζ Pup, and γ2 Vel, early-type stars within ˜ 500 pc of the Sun. The observed D/H differences are not inversely correlated with N/H, as would be expected if injection of CNO-processed material was the primary mechanism for the D/H abundance variations in the ISM.

Type
3. Abundances of D, 3He and 4He
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 242 - 243
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

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