Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...211...91v&link_type=abstract
Astrophysical Journal, vol. 211, Jan. 1, 1977, pt. 1, p. 91-107.
Astronomy and Astrophysics
Astrophysics
109
Abundance, Deuterium, Hydrogen Clouds, Interstellar Gas, Stellar Spectra, Data Processing, Data Reduction, Graphs (Charts), H Lines, Lyman Alpha Radiation, Lyman Beta Radiation
Scientific paper
An extensive set of measurements of the ratio of deuterium to hydrogen in the interstellar medium has been undertaken. The general observing program is described along with the data reduction techniques used to separate the complex deuterium and hydrogen profiles, and the results of the measurements for two stars, Zeta Pup and Gamma Cas. For Gamma Cas, log N(D)/N(H) is found to be approximately -4.8, in agreement with previous measurements. For Zeta Pup, a complicated structure of absorbing clouds in the interstellar medium is inferred. The best value of log N(D)/N(H) is about -4.6 for each of two components. One component is probably more complex than can be demonstrated directly at the resolution employed, and log N(D)N(H) could be -4.0 or larger in this component.
Bonnet Roger-Maurice
Laurent Camille
Vidal-Madjar Alfred
York Don G.
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