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Spiral structure and star formation. I - Formation mechanisms and mean free pathsThe wide variety of optical appearances observed in spiral galaxies has encouraged the growth of two theoretical approaches to explain the spiral patterns exhibited by such young objects as OB associations, giant H II regions, and dark dust lanes. These approaches are related to the density wave theory of spiral structure and 'stochastic, self-propagating star formation'. Levinson and Roberts (1981) tried to reconcile these two theoretical approaches, and considered a disk filled with discrete gas clouds. The present investigation is concerned with refinements and extensions of the model of Levinson and Roberts. Attention is given to gravitational forces and dynamical propagation, cloud-cloud collisions, supernova interactions, computational models, a theory concerning the interactions of the gas cloud and stellar association systems, the time evolution of the gas cloud-stellar association systems, and aspects of collisionally triggered star formation.
Document ID
19840043171
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Roberts, W. W., Jr.
(Virginia Univ. Charlottesville, VA, United States)
Hausman, M. A.
(Virginia, University Charlottesville, VA, United States)
Date Acquired
August 12, 2013
Publication Date
February 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 277
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
84A25958
Funding Number(s)
CONTRACT_GRANT: NSF AST-79-09935
CONTRACT_GRANT: NAS1-15810
CONTRACT_GRANT: NSF AST-82-04256
Distribution Limits
Public
Copyright
Other

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