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来自中子星合并遗留物和巨型蓝色基隆新星的喷气
Luciano Combi1,2,3, Daniel M Siegel1,2,4
1Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada.
Physical review letters
|December 22, 2023
概括
二进制中子星的合并在几毫秒内产生喷气和风,驱动千新星信号. 这些现象与GW170817的观测相一致,为这些宇宙事件提供了洞察力.
科学领域:
- 天体物理学 天体物理学
- 核物理 核物理 核物理
- 计算物理 计算物理
背景情况:
- 二进制中子星 (BNS) 合并是理解重元素核合成和引力波天体物理学的关键事件.
- 来自BNS合并的残余物体和喷射物体的属性对于解释像基隆新星这样的电磁对应物体至关重要.
- 之前的研究已经模拟了BNS的合并,但对喷气形成和千诺瓦辐射的自相一致的模拟具有挑战性.
研究的目的:
- 执行BNS合并的3D一般相对论磁动力学模拟.
- 为了研究从长寿的残余中子星喷射和风的出现和特性.
- 为了建模产生的千诺瓦排放,并将其与观测数据进行比较,特别是GW170817.
主要方法:
- 使用了三维的广义相对论磁动力学模拟.
- 整合了弱相互作用,以实现BNS合并的现实模型.
- 专注于模拟导致长寿残余中子星的模拟.
主要成果:
- 在合并后30毫秒内证明了磁化初始喷气 (洛伦茨因子 Γ∼5-10) 的自相一致的出现.
- 观察到喷气式飞机从合并残骸中在20 ms内突破.
- 在数小时的时间尺度上确定了一种快速的磁化风,产生紫外线/蓝色千诺瓦前体.
- 在50毫秒内显示了大量 (2×10−2 M) 无化物喷射的发射,在几天的时间尺度上产生了与GW170817一致的千新星.
结论:
- BNS合并可以快速发射强大的喷气和风,驱动可观测的千诺瓦信号.
- 模拟的喷射特性和千诺瓦光曲线与GW170817的观测结果一致.
- 这些发现凸显了磁动力学在BNS合并结果及其电磁对应物中的重要性.
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