Magnetic field enhancement within a remnant

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-08-14 DOI:10.1038/s41550-024-02352-2

Bishwanath Gaire

引用次数: 0

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残余物内部的磁场增强

超新星遗迹（SNR）是恒星演化过程中产生的，被认为是产生高能粒子和宇宙射线的理想场所。SNR 中的磁场在确定发射粒子的能量方面起着关键作用。最近，Moeri Tao 及其同事利用射电和 X 射线辐射分析了超新星 SN 1006（包括东北壳和西南壳）的磁场，发现磁场强度局部增强了约 100 倍。MeerKAT射电望远镜的宽带射电数据（从1.37千兆赫到100千兆赫）不能用单一的幂律来描述，因为在36千兆赫左右的断裂频率处，光谱行为发生了明显的变化。出现这种特征的一个合理原因是电子冷却导致同步辐射损失。当电子冷却时间和 SNR 的动态时间尺度达到平衡时，就会出现这种冷却断裂。断裂频率与超过 2 mG 的磁场强度相对应。最小磁场强度为 10 μG，由电子和磁场能量密度的等分得到。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

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