Detection of [C i] Emission in Nebular Spectra of a Peculiar Type Ia Supernova 2022pul

• Published in: Astrophysical journal. Letters Vol. 982; no. 1; p. L18
• Main Authors: Liu, Jialian, Wang, Xiaofeng, Yang, Yi, Filippenko, Alexei V., Brink, Thomas G., Zheng, WeiKang, Zhang, Jujia, Li, Gaici, Yan, Shengyu
• Format: Journal Article
• Language: English
• Published: The American Astronomical Society 20.03.2025; IOP Publishing
• Subjects: Supernovae; Type Ia supernovae; White dwarf stars

SN 2022pul gains special attention due to its possible origin as a super-Chandrasekhar-mass white dwarf (WD) explosion (also called a 03fg-like Type Ia supernova), which shows prominent [O i ], [Ne i ], and [Ca ii ] lines in its late-time spectra taken at ∼+300 days after the time of peak brightness...