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X-ray, optical and UV observations of the young supernova remnant in the irregular galaxy NGC 4449A powerful young supernova remnant (SNR) similar to Cas A has recently been discovered in the irregular galaxy NGC 4449. X-ray, optical and ultraviolet data have been obtained which allow possible models for this object to be investigated and its age to be estimated. Several lines of argument indicate a massive star of order 25 solar masses as the precursor to this remnant. If the X-ray emision is attributed to a reverse shock in the ejecta, the remnant should be about 120 years old.
Document ID
19840060371
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blair, W. P. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Raymond, J. C. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Kirshner, R. P. (Michigan, University Ann Arbor, MI, United States)
Winkler, P. F. (Middlebury College Middlebury, VT, United States)
Fesen, R. A. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Gull, T. R. (NASA Goddard Space Flight Center Laboratory for Solar and Stellar Physics, Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Astrophysics
Accession Number
84A43158
Funding Number(s)
CONTRACT_GRANT: NAG5-87
CONTRACT_GRANT: NAG8-389
CONTRACT_GRANT: NSF AST-81-05050
CONTRACT_GRANT: NAG8-341
Distribution Limits
Public
Copyright
Other

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