Pre-supernova activity as a possible explanation of the peculiar properties of Type IIP supernova 2009kf. Issue 2 (20th November 2020)

• Record Type: Journal Article
• Authors: Ouchi, Ryoma; Maeda, Keiichi
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 500:Issue 2(2021)
• Page Start: 1889
• Page End: 1894
• Publication Date: 2020-11-20
• Subjects: stars: evolution -- stars: massive -- transients: supernovae; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa2527
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: SN 2009kf is an exceptionally bright Type IIP supernova (SN IIP) discovered by the Pan-STARRS 1 survey. The V -band magnitude in the plateau phase is MV = −18.4 mag, which is much brighter than that for typical SNe IIP. We propose that its unusual properties can be naturally explained if we assume that there was a super-Eddington energy injection into the envelope in the last few years of the evolution before the SN explosion. Using a progenitor model with such a pre-SN energy injection, we can fit the observational data of SN 2009kf with a reasonable explosion energy of E exp = 2.8 × 10 51 erg and 56 Ni mass of 0.25 M⊙ . Specifically, we injected the energy into the envelope at a constant rate of 3.0 × 10 39 erg s −1 in the last 3.0 yr of evolution before the core collapse. We propose that some unusually bright SNe IIP might result from pre-SN energy injection into the envelope.