Ibn型超新星2020nxt的低质量氦星前身星模型
高能天体物理现象
2023-05-10 v1 太阳与恒星天体物理
摘要
越来越多已知的超新星（SNe）显示出与致密、预先存在的星周介质（CSM）发生显著相互作用的证据。Ibn型超新星即构成这样一类，其特征是光变曲线快速演化且持续存在窄He I谱线。这些系统中如此致密CSM的起源仍是一个紧迫问题，尤其涉及前身星系统与质量损失机制。在本文中，我们给出了Ibn型SN 2020nxt的多波段数据，包括/STIS紫外光谱。我们用近期更新的、专为Ibn型超新星构型设计的CMFGEN模型拟合数据。紫外覆盖对能量学给出了强约束，且与CMFGEN模型结合后，为潜在前身星系统提供了新见解。我们发现最成功的模型是一颗的氦星，其在核心坍缩前数年失去了约富He包层。我们也考虑了可行的替代方案，如He白矮星并合。最终，我们得出结论：至少部分Ibn型超新星并非源自单一的大质量（）类Wolf-Rayet星。
引用
@article{arxiv.2305.05015,
title = {A Low-Mass Helium Star Progenitor Model for the Type Ibn SN 2020nxt},
author = {Qinan Wang and Anika Goel and Luc Dessart and Ori D. Fox and Melissa Shahbandeh and Sofia Rest and Armin Rest and Jose H. Groh and Andrew Allan and Claes Fransson and Nathan Smith and Griffin Hosseinzadeh and Alexei V. Filippenko and Jennifer Andrews and K. Azalee Bostroem and Thomas G. Brink and Peter Brown and Jamison Burke and Roger Chevalier and Geoffrey C. Clayton and Mi Dai and Kyle W. Davis and Ryan J. Foley and Sebastian Gomez and Chelsea Harris and Daichi Hiramatsu and D. Andrew Howell and Connor Jennings and Saurabh W. Jha and Mansi M. Kasliwal and Patrick L. Kelly and Erik C. Kool and Evelyn Liu and Emily Ma and Curtis McCully and Adam M. Miller and Yukei Murakami and Craig Pellegrino and Estefania Padilla Gonzalez and Derek Perera and Justin Pierel and César Rojas-Bravo and Matthew R. Siebert and Jesper Sollerman and Tamás Szalai and Samaporn Tinyanont and Schuyler D. Van Dyk and WeiKang Zheng and Kenneth C. Chambers and David A. Coulter and Thomas de Boer and Nicholas Earl and Diego Farias and Christa Gall and Peter McGill and Conor L. Ransome and Kirsty Taggart and V. Ashley Villar},
journal= {arXiv preprint arXiv:2305.05015},
year = {2023}
}
备注
17 pages, 13 figures, 1 table, submitted to MNRAS