Open AccessPhotometric and spectroscopic evolution of the Type IIP supernova SN 2004et
Author(s) -
Sahu D. K.,
Anupama G. C.,
Srividya S.,
Muneer S.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10937.x
Subject(s) - physics , supernova , astrophysics , astronomy , type (biology) , light curve , photometry (optics) , stellar evolution , astrobiology , stars , ecology , biology
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 Hα luminosity in the nebular phase indicate that 0.06 ± 0.02 M ⊙ 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 × 10 51 erg . The late time light curve and the evolution of the [O i ] and Hα emission‐line profiles indicate the possibility of an early dust formation in the supernova ejecta. The luminosity of [O i ] 6300, 6364 Å 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 ⊙ , and a main‐sequence mass of 20 M ⊙ for the progenitor.