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Motions near the galactic center and the '3-kpc arm.'As a first approximation, the motions of the neutral hydrogen in the region between 1 and 5 kpc from the galactic center are found to be well represented in the Tb(l, V) diagram by a disk in differential rotation, and no evidence is found for a general field of expanding motions. Consequently, a rotation curve for this region has been derived from the observations. The new curve indicates a more uniform distribution of mass in the inner region of the Galaxy than many previous models. In a second approximation, a set of parameters is derived for an elliptical dispersion ring that represents not only the 3-kpc arm but also the + 70 km/sec expanding arm in the Tb(l, V) diagram.
Document ID
19730060378
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Simonson, S. C., III
Mader, G. L.
(Maryland, University College Park, Md., United States)
Date Acquired
August 7, 2013
Publication Date
September 1, 1973
Publication Information
Publication: Astronomy and Astrophysics
Volume: 27
Issue: 3, Se
Subject Category
Space Sciences
Accession Number
73A45180
Distribution Limits
Public
Copyright
Other

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