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Spectra of two very old supernovae - SN 1986J and SN 1980KSpectra are presented for SN 1986J in NGC 891, observed 4 and 7 years after the explosion, and SN 1980K, observed 9 years after maximum light. A narrow-line and a broad-line component are noted in SN 1986J; these are respectively attributed to a circumstellar shell and the actual stellar interior (without hydrogen). SN 1980K continues to emit in very broad lines. Comparison with earlier observations suggests that this SN halted its exponential flux decline in the early 1980s, and is currently emitting at a constant rate. In both SNs studies, the identity of the energy source which sustains emission remains uncertain.
Document ID
19910050418
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leibundgut, Bruno
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Kirshner, Robert P.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Pinto, Philip A.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Rupen, Michael P.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Smith, R. Chris
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
May 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 372
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A35041
Funding Number(s)
CONTRACT_GRANT: NAS5-29225
CONTRACT_GRANT: NSF AST-89-05529
Distribution Limits
Public
Copyright
Other

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