Optical studies of a bright Type Iax supernova SN 2020rea
arXiv:2210.11752 · doi:10.1093/mnras/stac3059
Abstract
We present optical photometric and spectroscopic analysis of a Type Iax supernova (SN) 2020rea situated at the brighter luminosity end of Type Iax supernovae (SNe). The light curve decline rate of SN~2020rea is m(g) = 1.310.08 mag which is similar to SNe 2012Z and 2005hk. Modelling the pseudo bolometric light curve with a radiation diffusion model yields a mass of Ni of 0.130.01 M and an ejecta mass of 0.77 M. Spectral features of SN~2020rea during the photospheric phase show good resemblance with SN 2012Z. TARDIS modelling of the early spectra of SN~2020rea reveals a dominance of Iron Group Elements (IGEs). The photospheric velocity of the Si {\sc II} line around maximum for SN~2020rea is 6500 km s which is less than the measured velocity of the Fe {\sc II} line and indicates significant mixing. The observed physical properties of SN~2020rea match with the predictions of pure deflagration model of a Chandrasekhar mass C-O white dwarf. The metallicity of the host galaxy around the SN region is 12+log(O/H) = 8.560.18 dex which is similar to that of SN 2012Z.
arXiv comment11 pages, 12 figures, 4 tables, accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS)
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