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| Paper: |
The Early Flux Excess in the Light Curve of SN Ia 2021hpr: An Approach with the Companion Interaction Model |
| Volume: |
536, The Twelfth Pacific Rim Conference on Stellar Astrophysics |
| Page: |
29 |
| Authors: |
Lim, G.; Im, M.; Paek, G. S. H.; Yoon, S.-C.; IMSNG Team |
| Abstract: |
Type Ia supernovae (SNe Ia) are believed to originate from a binary system involving a carbon/oxygen white dwarf (C/O WD). Our study focuses on SN 2021hpr in NGC 3147, which is classified as a normal SN Ia. Notably, an early excess in the light curve deviates from the simple power-law evolution (∼t2), suggesting shock-heated cooling emissions from a nondegenerate companion star (R∗ = 8.84±0.58 R⊙). Despite the early excess light supporting the single degenerate scenario, we find no significant amount of stripped mass from the companion. The absence of emission lines suggests other alternative methods to fully explain this event. |
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