ZTF25abjmnps (AT2025ulz) 与 S250818k：来自次阈值亚太阳质量引力波触发器的超新星类核合并候选
高能天体物理现象
2025-11-17 v2 天体物理仪器与方法
太阳与恒星天体物理
摘要
2025 年 8 月 18 日，LIGO-Virgo-KAGRA 联合报告了来自次阈值双中子星合并的引力波。若为astrophysical事件，将具有惊人的低浩赫质量，暗示至少一颗中子星质量低于太阳质量。Zwicky 瞬态设施映射了粗略的定位，发现了一个瞬态 ZTF25abjmnps（AT2025ulz），其空间和时间上与引力波触发器相吻合。首周的跟踪表现出类似 GW170817 类核超新星的特征。后续跟踪表现出最接近年轻的、赤血质 Type IIb 超新星的特征。尽管我们无法从统计上排除偶然吻合的可能性，但我们对 ZTF25abjmnps 与 S250818k 之间的关联进行了彻尽的分析，以探索这种可能的关联。理论模型已提出亚太阳质量中子星（可能通过吸积盘碎片化或核心裂解在核心坍缩超新星内形成并随后合并）的“超新星类核合并”。我们从定性角度讨论了我们的数据集是否符合超新星类核合并的图景。未来更高置信度的亚太阳质量中子星合并引力波探测，配合广泛的电磁跟踪，将最终确定性地解决这条令人期待的多信使关联。
引用
@article{arxiv.2510.23732,
title = {ZTF25abjmnps (AT2025ulz) and S250818k: A Candidate Superkilonova from a Sub-threshold Sub-Solar Gravitational Wave Trigger},
author = {Mansi M. Kasliwal and Tomas Ahumada and Robert Stein and Viraj Karambelkar and Xander J. Hall and Avinash Singh and Christoffer Fremling and Brian D. Metzger and Mattia Bulla and Vishwajeet Swain and Sarah Antier and Marion Pillas and Malte Busmann and James Freeburn and Sergey Karpov and Aleksandra Bochenek and Brendan O'Connor and Daniel A. Perley and Dalya Akl and Shreya Anand and Andrew Toivonen and Sam Rose and Theophile Jegou du Laz and Chang Liu and Kaustav Das and Sushant Sharma Chaudhary and Tyler Barna and Aditya Pawan Saikia and Igor Andreoni and Eric C. Bellm and Varun Bhalerao and S. Bradley Cenko and Michael W. Coughlin and Daniel Gruen and Daniel Kasen and Adam A. Miller and Samaya Nissanke and Antonella Palmese and Jesper Sollerman and Niharika Sravan and G. C. Anupama and Smaranika Banerjee and Sudhanshu Barway and Joshua S. Bloom and Tomas Cabrera and Tracy Chen and Chris Copperwheat and Alessandra Corsi and Richard Dekany and Nicholas Earley and Matthew Graham and Patrice Hello and George Helou and Lei Hu and Yves Kini and Ashish Mahabal and Frank Masci and Tanishk Mohan and Natalya Pletskova and Josiah Purdum and Yu-Jing Qin and Nabeel Rehemtulla and Anirudh Salgundi and Yuankun Wang},
journal= {arXiv preprint arXiv:2510.23732},
year = {2025}
}
备注
Accepted by ApJL on 11/4/25