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

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168832· OSTI ID:6697005

Murthy, J; Henry, R C; Moos, H W; Vidal-Madjar, A; Linsky, J L ^[1]

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1. NASA, Goddard Space Flight Center, Greenbelt, MD (USA) Johns Hopkins Univ., Baltimore, MD (USA) CNR, Institut d'Astrophysique, Paris (France) Joint Institute for Laboratory Astrophysics, Boulder, CO (USA)

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. 16 refs.

• OSTI ID: 6697005
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 356; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ATMOSPHERES
CHEMICAL COMPOSITION
COSMIC GASES
DENSITY
DEUTERIUM
ELEMENTS
EMISSION SPECTRA
FLUIDS
GASES
HYDROGEN
HYDROGEN ISOTOPES
INTERSTELLAR SPACE
ISOTOPES
LIGHT NUCLEI
LIMITING VALUES
LYMAN LINES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PHYSICAL PROPERTIES
SPACE
SPECTRA
STABLE ISOTOPES
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR WINDS
ULTRAVIOLET SPECTRA
VELOCITY