中文

SN 2024abfl:具有早期星周物质相互作用的平坦平台、低光度IIP型超新星

高能天体物理现象 2026-01-07 v1

摘要

我们展示了SN 2024abfl的光度测量和光谱观测,这是一颗在爆炸后不久被发现的低光度IIP型超新星(LLSN)。该暂现源达到峰值绝对星等MV=14.9M_V = -14.9,并表现出持续约125天的延展平坦平台。根据晚期热光度曲线,我们估计56^{56}Ni质量约为0.01 M0.01~M_\odot,与其他LLSNe一致。解析激波冷却模型无法重现快速的早期上升,表明星周物质(CSM)相互作用对初始辐射有所贡献。光谱演化是LLSNe的典型特征,具有相对较窄的金属谱线和较低的膨胀速度(3000\lesssim 3000 km s1^{-1}),且随时间缓慢下降。我们在爆炸后三天内探测到约4600 Å处的一个宽“台阶”特征,我们将其解释为高电离激波加速的CSM谱线的混合。在平台阶段发展出多峰Hα\alpha轮廓,与复杂的抛射物-CSM相互作用一致。作为观测最充分的LLSNe样本之一,SN 2024abfl表现出弱爆炸和附近CSM的特征,为前身星性质、爆炸前质量损失以及LLSNe的多样性提供了新的见解。

关键词

引用

@article{arxiv.2601.02638,
  title  = {SN 2024abfl: A Flat-Plateau, Low-Luminosity Type IIP Supernova with Early CSM Interaction},
  author = {Madison Gerard and Jennifer E. Andrews and Geoffrey C. Clayton and David J. Sand and K. Azalee Bostroem and Jeniveve Pearson and Raya Dastidar and Aravind P. Ravi and Conor L. Ransome and Bhagya Subrayan and Griffin Hosseinzadeh and Brian Hsu and Yize Dong and Manisha Shrestha and Stefano Valenti and Nathan Smith and Daryl Janzen and M. J. Lundquist and Nicolas Meza and Saurabh W. Jha and Kate D. Alexander and Collin Christy and Noah Franz and Lindsey A. Kwok and Moira Andrews and Joseph Farah and Daichi Hiramatsu and D. Andrew Howell and Curtis McCully and Kathryn Wynn and Reka Konyves-Toth and Xiaofeng Wang},
  journal= {arXiv preprint arXiv:2601.02638},
  year   = {2026}
}

备注

Will be submitted to ApJ during AAS. Comments can be sent to [email protected] and [email protected]