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On the local standard of restUnder the influence of a spiral gravitational field, there should be differences among the mean motions of different types of objects with different dispersion velocities in a spiral galaxy. The old stars with high dispersion velocity should have essentially no mean motion normal to the galactic rotation. On the other hand, young objects and interstellar gas may be moving relative to the old stars at a velocity of a few kilometer per second in both the radial (galacto-centric), and circular directions, depending on the spiral model adopted. Such a velocity is usually referred as the systematic motion or the streaming motion. The conventionally adopted local standard of rest is indeed co-moving with the young objects of the solar vicinity. Therefore, it has a net systematic motion with respect to the circular motion of an equilibrium galactic model, defined by the old stars. Previously announced in STAR as N83-24443
Document ID
19830058415
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yuan, C.
(City College New York, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Astrophysics
Meeting Information
Meeting: Kinematics, dynamics and structure of the Milky Way; Workshop on the Milky Way
Location: British Columbia
Country: Canada
Start Date: May 17, 1982
End Date: May 19, 1982
Accession Number
83A39633
Funding Number(s)
CONTRACT_GRANT: NSG-2348
Distribution Limits
Public
Copyright
Other

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