LSQ13ddu：一颗具有早期星周相互作用特征的快速演化剥离包层超新星
高能天体物理现象
2020-01-22 v2 太阳与恒星天体物理
摘要
本文描述了由La Silla-QUEST巡天发现的、快速演化且不同寻常的超新星LSQ13ddu。LSQ13ddu仅用4.8±0.9 d便快速增亮，在LSQgr波段达到-19.70±0.02 mag的峰值亮度。LSQ13ddu的早期光谱显示出源于与星周物质（CSM）相互作用而产生的微弱且狭窄的He I特征。这些相互作用特征迅速减弱，在极大后约两周，与剥离包层超新星中所见一致宽特征占据主导。狭窄He I速度与大质量蓝变星的风速一致，但其光谱缺乏通常所见的氢特征。快速而明亮的早期光变曲线无法由放射性56Ni供能解释，但可通过CSM相互作用与在LSQ13ddu后期行为中占主导的潜在56Ni衰变成分共同说明。基于潜在宽特征强度，与标准SNe Ib相比，LSQ13ddu似乎氦匮乏。
引用
@article{arxiv.1912.05986,
title = {LSQ13ddu: A rapidly-evolving stripped-envelope supernova with early circumstellar interaction signatures},
author = {Peter Clark and Kate Maguire and Cosimo Inserra and Simon Prentice and Stephen J. Smartt and Carlos Contreras and Griffin Hossenizadeh and Eric Y. Hsiao and Erkki Kankare and Mansi Kasliwal and Peter Nugent and Melissa Shahbandeh and Charles Baltay and David Rabinowitz and Iair Arcavi and Chris Ashall and Christopher R. Burns and Emma Callis and Ting-Wan Chen and Tiara Diamond and Morgan Fraser and D. Andrew Howell and Emir Karamehmetoglu and Rubina Kotak and Joseph Lyman and Nidia Morrell and Mark Phillips and Giuliano Pignata and Miika Pursiainen and Jesper Sollerman and Maximilian Stritzinger and Mark Sullivan and David Young},
journal= {arXiv preprint arXiv:1912.05986},
year = {2020}
}
备注
22 pages, 20 figures; accepted for publication in MNRAS