Other
Scientific paper
Oct 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225..465m&link_type=abstract
Astrophysical Journal, Part 1, vol. 225, Oct. 15, 1978, p. 465-481.
Other
82
Abundance, Cool Stars, Interstellar Gas, Late Stars, Lyman Alpha Radiation, Stellar Spectrophotometry, Ultraviolet Spectra, Absorption Spectra, Deuterium, Hydrogen Clouds, Interstellar Extinction, Line Spectra, Oao 3
Scientific paper
High-resolution Copernicus spectra of Epsilon Eri and Epsilon Ind containing interstellar hydrogen and deuterium L-alpha absorption lines are presented, reduced, and analyzed. Parameters of the interstellar hydrogen and deuterium toward these two stars are derived independently, without any assumptions concerning the D/H ratio. Copernicus spectra of Alpha Aur and Alpha Cen A are reanalyzed, and limits on the D/H number-density ratio consistent with the data for all four stars are considered. A comparison of the present estimates for the parameters of the local interstellar medium with those obtained by other techniques shows that there is no compelling evidence for significant variations in the hydrogen density and D/H ratio in the local interstellar medium. On this basis the hypothesis of an approaching local interstellar cloud proposed by Vidal-Madjar et al. (1978) is rejected
Henry Richard C.
Linsky Jeffrey L.
McClintock William
Moos Warren H.
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