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Detection of Persistent Helium Absorption in the 91bg-like Type Ia Supernova 2022an

  • Authors: Ping Chen, Avishay Gal-Yam, Subo Dong, Renyue Cen, Boaz Katz, Kate Maguire, Steve Schulze, Jesper Sollerman, Joseph P Anderson, Ting-Wan Chen, L. Galbany, Mariusz Gromadzki, Chang Liu, Adam A. Miller, Tomás E. Müller-Bravo, Tanja Petrushevska, Giuliano Pignata

Ping Chen et al 2026 The Astrophysical Journal Letters 1004 .

  • Provider: AAS Journals

Caption: Figure 5.

The γ-ray escape time t0 and 56Ni mass of SN 2022an in the context of the SN Ia population. The comparison samples are taken from N. Wygoda et al. (2019) and A. Sharon et al. (2025). The asterisk symbol indicates the result obtained without accounting for the error budget due to the uncertain distance to SN 202an.

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