Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et

2006/08/21 by D. K. Sahu, G. C. Anupama, S. Srividya +1 · 193 citations
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #CCD and CMOS Imaging Sensors #Galaxy #Gamma-ray bursts and supernovae #Light curve #Luminosity #Pair-instability supernova #Photometry (optics) #Spectroscopy #Supernova #Type II supernova #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2006.10937.x

published in Monthly Notices of the Royal Astronomical Society 372(3), 1315-1324 (Oxford University Press) · 26 pages, 11 figures, accepted for publication in MNRAS

arxiv created 2006/08/21 · openalex publication_date 2006/09/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 days to 541 days after explosion. The late time bolometric luminosity and the Hα luminosity in the nebular phase indicate that 0.06±0.02M_\odot of ⁵⁶Ni was synthesised 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_\rmexp= 1.20^+0.38_-0.30 × 10⁵¹ ergs. The late time light curve and the evolution of the [OI] and Hα emission line profiles indicate the possibility of an early dust formation in the supernova ejecta. The luminosity of [OI] 6300, 6364 \AA doublet, before the dust formation phase, is found to be comparable to that of SN 1987A at similar epochs, impling an oxygen mass in the range 1.5 - 2M_\odot, and a main sequence mass of 20M_\odot for the progenitor.

Citations

• The Peculiar Type II Supernova 1997D: A Case for a Very Low [TSUP]56[/TSUP]N[CLC]i[/CLC] Mass
• The Evolution and Explosion of Massive Stars. II. Explosive Hydrodynamics and Nucleosynthesis
• UBVRI passbands

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