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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 3.

B − V color curves of SN 2022an and several 91bg-like SNe Ia, including SN 1991bg (A. V. Filippenko et al. 1992b; B. Leibundgut et al. 1993), SN 1999by (P. Höflich et al. 2002; P. M. Garnavich et al. 2004), and SN 2006mr(K. Krisciunas et al. 2017). Galactic extinction has been corrected for all objects.

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