Studies of H I and D I in the local interstellar medium

Details Studies of H I and D I in the local interstellar medium Studies of H I and D I in the local interstellar medium

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...356..223m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 356, June 10, 1990, p. 223-228.

Astronomy and Astrophysics

Astrophysics

23

Deuterium, Hydrogen, Interstellar Gas, Lyman Alpha Radiation, Stellar Spectra, Absorption Spectra, Chromosphere, Emission Spectra, Iue, Late Stars, Stellar Winds

Scientific paper

High-dispersion IUE spectra are presented of the hydrogen Ly-alpha chromospheric emission line of two nearby late-type stars, Capella and Lambda And. Both interstellar H I and D I Ly-alpha absorption can be seen against the chromospheric line, and the density, velocity dispersion, and bulk velocity of the gas in those lines of sight are derived. Limits are placed on the D/H ratio. The results are consistent with the current picture of the local interstellar medium.

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