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Title:
Ultraviolet and radio observations of Milky Way halo gas
Authors:
Danly, Laura; Lockman, Felix J.; Meade, Marilyn R.; Savage, Blair D.
Affiliation:
AA(Space Telescope Science Institute, Baltimore, MD), AB(National Radio Astronomy Observatory, Charlottesville, VA), AC(Wisconsin, University, Madison), AD(Wisconsin, University, Madison)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 81, no. 1, July 1992, p. 125-161. (ApJS Homepage)
Publication Date:
07/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Galactic Structure, Interstellar Gas, Milky Way Galaxy, Radio Astronomy, Ultraviolet Astronomy, Absorption Spectra, Emission Spectra, Iue, Lyman Alpha Radiation, Spectral Bands, Velocity Measurement
DOI:
10.1086/191689
Bibliographic Code:
1992ApJS...81..125D

Abstract

Interstellar-absorption-line and 21-cm emission-line data for sight lines to 56 stars are combined in order to study the kinematics and spatial distribution of the gas that is at great distances from the Galactic plane. Measurements of the interstellar velocities and H I column densities from the 21-cm emission and Ly-alpha absorption are included. The problem of contamination of the interstellar Ly-alpha absorption line by stellar Ly-alpha absorption is analyzed, and this information is used to reevaluate the vertical distribution of H I. A new method for determining lower limits on the vertical distribution of gas by including information on the velocity structure in the gas is presented. The data for individual sight lines are discussed.

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