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The kinematics of Milky Way halo gas. I - Observations of low-ionization speciesUltraviolet interstellar line day observed with the IUE toward 70 halo stars and four extragalactic sight lines are analyzed in a study of the large-scale kinematic properties of the Milky Way halo gas. The motions of the low-ionization gas is focused on. Large systematic velocities are found, and a pronounced asymmetry in the absorption characteristics of halo gas toward the Galactic poles is indicated. In the north, substantial amounts of material are falling toward the disk at velocities up to about 120 km/s in the most extreme case. Toward the south, low-ionization material shows no extreme or systematic motions.
Document ID
19890058295
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Danly, Laura
(Wisconsin, University Madison, United States)
Date Acquired
August 14, 2013
Publication Date
July 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 342
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A45666
Funding Number(s)
CONTRACT_GRANT: NAG5-186
Distribution Limits
Public
Copyright
Other

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