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Date and Time of the Query: 2019-06-18 T21:03:13 PDT
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For refcode 2006MNRAS.372.1315S:
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NED Abstract

Copyright by Royal Astronomical Society. 2006MNRAS.372.1315S Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et Sahu, D. K.; Anupama, G. C.; Srividya, S.; Muneer, S. Abstract. We present optical photometry and spectroscopy of the Type IIP supernova SN 2004et that occurred in the nearby galaxy NGC 6946. The observations span a time range of 8-541 d after explosion. The late time bolometric luminosity and the H{alpha} luminosity in the nebular phase indicate that 0.06 +/- 0.02 M_sun_ of ^56^Ni was synthesized during the explosion. The plateau luminosity, its duration and the expansion velocity of the supernova at the middle of the plateau indicate an explosion energy of E_exp_ = 1.20^+0.38^_-0.30_ x 10^51^ erg. The late time light curve and the evolution of the [O i] and H{alpha} emission-line profiles indicate the possibility of an early dust formation in the supernova ejecta. The luminosity of [O i] 6300, 6364 Angstrom doublet, before the dust formation phase, is found to be comparable to that of SN 1987A at similar epochs, implying an oxygen mass in the range 1.5-2 M_sun_, and a main-sequence mass of 20 M_sun_ for the progenitor. Key words: supernovae: general, supernovae: individual: SN 2004et, galaxies: individual: NGC 6946
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