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The dynamical and radiative evolution of clumpy supernova ejectaNumerical simulations describing the dynamical and radiative evolution of clumpy supernova ejecta are compared with observations of optical and radio emission knots in supernova remnant (SNR) Cassiopeia A. Three major phases are identified in the evolution of clumpy ejecta: a bow-shock phase, an instability phase, and a dispersal phase. The phenomenological and radiative signatures of each phase are discussed and compared with multi-epoch measurements of small-scale features in Cas A. Good correspondence is found between theory and observations. Both support the premise that compact radio emission features are controlled more by magnetic field amplification triggered in the instability phase than by in situ acceleration of new relativistic particles.
Document ID
19950034794
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Anderson, M. C.
(University of Minnesota, Minneapolis, MN United States)
Jones, T. W.
(University of Minnesota, Minneapolis, MN United States)
Rudnick, L.
(University of Minnesota, Minneapolis, MN United States)
Tregillis, I. L.
(University of Minnesota, Minneapolis, MN United States)
Kang, Hyesung
(Pusan National University Pusan, Korea, United States)
Date Acquired
August 16, 2013
Publication Date
January 20, 1994
Publication Information
Publication: Astrophysical Journal, Part 2
Volume: 421
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A66393
Funding Number(s)
CONTRACT_GRANT: NAGW-2548
CONTRACT_GRANT: NSF AST-87-20285
CONTRACT_GRANT: NSF AST-91-00486
Distribution Limits
Public
Copyright
Other

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