Continued Monitoring of the Late-Time Optical Emission from SN 1980K

Abstract

view Abstract Citations (14) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Continued Monitoring of the Late-Time Optical Emission from SN 1980K Fesen, R. A. ; Hurford, A. P. ; Matonick, D. M. Abstract A September 1994 spectrum of SN 1980K covering 5500-10000A shows broad Hα emission at a flux level of 1.4+/-0.2 x 10^15^ erg cm^-2^ s^-1^. When combined with previous measurements, these data set a 0.25 mag limit to the decrease of the supernova's Hα emission during the period 1987 to 1994. The Hα line profile appears narrower (FWHM= 190 A) than that seen in 1992, confirming a trend predicted by SN-circumstellar interaction models. However, neither a power law SN density profile nor one steeper like that expected in a red supergiant match all the observed relative line intensities. This new spectrum sets stringent limits on the presence of [C I] λ8729, the Ca II infrared triplet, and [S III] λ{lamba}9069,9531 emission at <= 0.25 x F(Hα, below that predicted by the favored power law SN envelope model. Publication: The Astronomical Journal Pub Date: June 1995 DOI: 10.1086/117473 Bibcode: 1995AJ....109.2608F Keywords: SUPERNOVAE: INDIVIDUAL: SN 1980K full text sources ADS | data products SIMBAD (7) NED (2)