SN 2019vxm：Fermi与TESS之间的震惊性契合
高能天体物理现象
2026-05-20 v2
摘要
冲击破裂以及某些情况下喷流驱动的高能辐射日益被认识为核心崩塌超新星最早相位的关键特征，尤其在IIn型超新星中，如因其致密的、相互作用主导的周围介质。我们对SN 2019vxm进行了全程光度分析，这是一颗持续时间长、亮度极高的IIn型超新星，，观测覆盖从X射线到近红外。SN 2019vxm是首个在升起阶段获得密集TESS光度数据且首次捕获确定性X射线源的超亮IIn型超新星。高采样TESS光度曲线捕获了早期升起阶段，良好拟合为断点幂律，指数为，显著小于标准行为。从而我们将首次亮光时间限制在7.2小时内。我们确认SN 2019vxm与X射线瞬变事件GRB191117A在空间和时间上相吻合，对应的关联置信度。短暂的X射线事件及光度曲线建模均与冲击破裂进入致密、非对称周围介质相符，暗示其前体为亮蓝变星向猛禽鸟相位过渡，嵌入松散、非对称环境中。
引用
@article{arxiv.2511.15975,
title = {SN 2019vxm: A Shocking Coincidence between Fermi and TESS},
author = {Zachary G. Lane and Ryan Ridden-Harper and Sofia Rest and Armin Rest and Conor L. Ransome and Qinan Wang and Clarinda Montilla and Micaela Steed and Igor Andreoni and Patrick Armstrong and Peter J. Brown and Jeffrey Cooke and David A. Coulter and Ori Fox and James Freeburn and Marco Galoppo and Avishay Gal-Yam and Jared A. Goldberg and Christopher Harvey-Hawes and Daichi Hiramatsu and Rebekah Hounsell and Brayden Leicester and Klára Lelkes and Itai Linial and Lászlo Molnár and Thomas Moore and Pierre Mourier and Anya E. Nugent and David O'Neill and Hugh Roxburgh and Koji Shukawa and Stephen J. Smartt and Nathan Smith and Ken W. Smith and Sebastian Vergara Carrasco and V. Ashley Villar and József Vinkó and Tal Wasserman and Zenati Yossef and Erez Zimmerman},
journal= {arXiv preprint arXiv:2511.15975},
year = {2026}
}
备注
26 pages, 9 figures. Submitted to The Astrophysical Journal