Abstract
view Abstract Citations (279) References (77) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An IUE Survey of Interstellar H i LY alpha Absorption. I. Column Densities Diplas, Athanassios ; Savage, Blair D. Abstract We measure Galactic interstellar neutral hydrogen column densities by analyzing archival interstellar Ly alpha absorption line data toward 554 B2 and hotter stars observed at high resolution with the IUE satellite. This study more than doubles the number of lines of sight with measures of N(H I) based on Ly alpha. We have included the scattered light background correction algorithm of Bianchi and Bohlin in our data reduction. We use the correlation between the Balmer discontinuity (c1) index and the stellar Ly alpha absorption in order to assess the effects of stellar Ly alpha contamination. Approximately 40% of the B stars with measured (c1) index, exhibit serious stellar Ly alpha contamination. One table contains the derived values of the interstellar N(H I) for 393 stars with at most small amounts of stellar contamination. Another lists the observed values of total N(H I) for 161 stars with suspected stellar Ly alpha contamination and/or uncertain stellar parameters. Publication: The Astrophysical Journal Supplement Series Pub Date: July 1994 DOI: 10.1086/192052 Bibcode: 1994ApJS...93..211D Keywords: Absorption Spectra; Astronomical Spectroscopy; H I Regions; Interstellar Gas; Lyman Alpha Radiation; Lyman Spectra; Ultraviolet Astronomy; Background Radiation; Gas Density; Hot Stars; Iue; Astrophysics; ISM: ABUNDANCES; STARS: EARLY-TYPE; ULTRAVIOLET: ISM full text sources ADS | data products SIMBAD (554) CDS (2) MAST (1) Related Materials (2) Catalog: 1997yCat..20930211D Part 2: 1994ApJ...427..274D
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