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Molecular clouds in the Carina arm - Large-scale properties of molecular gas and comparison with H IResults from the first large-scale survey in the CO (J = 1 - 0) line of the Vela-Carina-Centaurus region of the southern Milky Way are reported. The results demonstrate that molecular clouds in the Galaxy are largely confined to the spiral arms and that CO is therefore an extremely good tracer of the large-scale structure of the system. The Carina arm is the dominant feature in the data. Its abrupt tangent at l of roughly 280 deg and characteristic loop in the (l, v) diagram are unmistakable evidence for CO spiral structure. When the emission is integrated over velocity and latitude, the height of the step seen in the tangent direction indicate that the arm-interarm contrast is at least 13:1.
Document ID
19870051085
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Grabelsky, D. A.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Cohen, R. S.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Bronfman, L.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Thaddeus, P.
(NASA Goddard Institute for Space Studies; Columbia University New York, United States)
May, J.
(Universidad de Chile Santiago, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 315
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A38359
Distribution Limits
Public
Copyright
Other

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