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The large-scale distribution of molecular gas in the first Galactic quadrantThe emission parameters for the molecular component of the interstellar medium are determined throughout the first Galactic quadrant. Face-on maps of the peak midplane molecular density, scale height, and offset from b = 0 deg with roughly 300 pc resolution are presented. These maps are compared with the distribution of cataloged H II regions to test whether both species trace the same Galactic locations. The properties of the spiral (or ringlike) arms are deduced from the derived images and pitch-angle upper limits are estimated. The H II regions are strongly correlated with the dense molecular rings.
Document ID
19880043388
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Clemens, Dan P.
(Steward Observatory Tucson, AZ, United States)
Sanders, David B.
(Arizona Univ. Tucson, AZ, United States)
Scoville, Nicholas Z.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 327
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
88A30615
Funding Number(s)
CONTRACT_GRANT: NSF AST-82-12252
Distribution Limits
Public
Copyright
Other

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