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Neutral hydrogen in the outer GalaxyThe H I 21 cm emission-line survey data of Stark et al. (1991) have been used to study the distribution of H I in the outer Galaxy and to improve understanding of the various systematic problems which influence all studies of Galactic H I. For n(H) greater than 0.01/cu cm, the distributions are similar to those found by Burton and te Lintel Hekkert (1986) but are 'better behaved' at substantially lower values of n(H). The z distribution of gas in the H I layer is best described as complicated. The behavior of the gaseous matter is consistent with the observed distribution of H I found in external spiral galaxies. In the directions of the maximum warp the average distance of the gas away from the Galactic plane reaches about 4 kpc at R about 24 kpc, while the flaring of the layer as measured by z(rms) increases to about 3 kpc. In directions where the warp layers particularly well measured, the Galaxy is followed to R about 30 kpc. The surface density of the atomic gas decreases exponentially.
Document ID
19910062673
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Diplas, Athanassios
(Wisconsin Univ. Madison, WI, United States)
Savage, Blair D.
(Washburn Observatory Madison, WI, United States)
Date Acquired
August 14, 2013
Publication Date
August 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 377
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A47296
Funding Number(s)
CONTRACT_GRANT: NAS5-29638
CONTRACT_GRANT: NAG5-186
Distribution Limits
Public
Copyright
Other

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