EMU 对低表面亮度大尺度银河系超新星遗迹 G288.8-6.3 的探测
高能天体物理现象
2023-08-21 v1 星系天体物理
摘要
我们展示了利用澳大利亚平方公里阵列探路者（ASKAP）-宇宙演化地图（EMU）巡天数据偶然探测到的一个新银河系超新星遗迹（SNR）G288.8-6.3。通过多频率分析，我们确认该天体为高银纬、低射电表面亮度的演化银河系 SNR，其典型 SNR 谱指数为 。为确定 SNR G288.8-6.3 中的磁场强度，我们首次推导了谱指数 的 SNR 的能量均分公式。其角尺寸为 ，我们估计其内禀尺寸约为 pc，这意味着距离约为 kpc，位置在银道面之上约 pc。这是角尺寸最大且距离最近的银河系 SNR 之一。鉴于其低射电表面亮度，我们推测其年龄约为 13000 年。
引用
@article{arxiv.2308.08716,
title = {EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8-6.3},
author = {Miroslav D. Filipović and Shi Dai and Bojan Arbutina and Natasha Hurley-Walker and Robert Brose and Werner Becker and Hidetoshi Sano and Dejan Urošević and T. H. Jarrett and Andrew M. Hopkins and Rami Z. E. Alsaberi and R. Alsulami and Cristobal Bordiu and Brianna Ball and Filomena Bufano and Christopher Burger-Scheidlin and Evan Crawford and Jayanne English and Frank Haberl and Adriano Ingallinera and Anna D. Kapinska and Patrick J. Kavanagh and Bärbel S. Koribalski and Roland Kothes and Sanja Lazarević and Jonathan Mackey and Gavin Rowell and Denis Leahy and Sara Loru and Peter J. Macgregor and Luciano Nicastro and Ray P. Norris and Simone Riggi and Manami Sasaki and Milorad Stupar and Corrado Trigilio and Grazia Umana and Tessa Vernstrom and Branislav Vukotić},
journal= {arXiv preprint arXiv:2308.08716},
year = {2023}
}
备注
Accepted for publication in The Astrophysical Journal