SN 2020udy: A new piece of the homogeneous bright group in the diverse Iax subclass

• DOI: 10.48550/arxiv.2401.07107
• Publication Date: 2024-01-01
• Authors: Mridweeka Singh; D. K. Sahu; Barnabás Barna; Anjasha Gangopadhyay; Raya Dastidar; Rishabh Singh Teja; Kuntal Misra; D. A. Howell; Xiaofeng Wang; Jun Mo; Shengyu Yan; D. Hiramatsu; C. Pellegrino; G. C. Anupama; Arti Joshi; K. Azalee Bostroem; J. Burke; C. McCully; Rama Subramanian V; Gaici Li; Gaobo Xi; Xin Li; Zhitong Li; Shubham Srivastav; Hyobin Im; Anirban Dutta
• Keywords: Deflagration; Spectral Analysis

We present optical observations and analysis of a bright type Iax SN~2020udy hosted by NGC 0812. The light curve evolution is similar to other SNe. Analytical modeling the quasi bolometric curves SN 2020udy suggests that 0.08$\pm$0.01 M$_{\odot}$ $^{56}$Ni would have been synthesized during explosion. Spectral features are members class showing weak Si {\sc II} line. late-time spectral sequence mostly dominated Iron Group Elements (IGEs) with broad emission lines. Abundance tomography time series using TARDIS indicates stratification in outer ejecta, however, confirm this, at very early phase required. After maximum light, uniform mixing chemical elements sufficient explain evolution. Unlike case normal Ia SNe, photospheric approximation remains robust until +100 days, requiring an additional continuum source. Overall, observational consistent deflagration Carbon-Oxygen white dwarf.