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由微准星SS 433喷气驱动的非常高能粒子加速器
A U Abeysekara1, A Albert2, R Alfaro3
1Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA.
Nature
|October 5, 2018
概括
高能马射线观测显示,SS 433/W50系统
科学领域:
- 天体物理学
- 高能天体物理学
- 粒子天体物理学
背景情况:
- SS 433 是一个微类星体,有一个超巨星聚集在一个紧的物体上,产生强大的喷射.
- 这些喷气与W50超新星残留物相互作用, 造成扭曲和粒子加速.
- 在更高的能量 (100GeV以上) 上进行的先前研究对发射机制 (电子与质子) 有了模两可的结果.
研究的目的:
- 调查SS 433/W50系统的高能马射线的来源.
- 为了空间分辨W50叶内的排放区域.
- 确定导致观测辐射的主导粒子群和能量范围.
主要方法:
- 为了研究SS 433/W50系统,采用了三电子伏特 (TeV) 马射线观测.
- 采用技术来空间解决W50残留的叶片.
- 分析了至少25 TeV的光子能量,并考虑了系统的观测几何.
主要成果:
- 检测到TeV马射线发射局部在W50叶内的结构,远离中央SS 433双星.
- 测量到的光子能量至少达到25 TeV,证实非多普勒增强的辐射.
- 通过广泛的能量范围 (无线电到TeV) 观察到的辐射与单个电子群体一致.
结论:
- 来自SS 433/W50的辐射来自加速到至少数百TeV的电子.
- 这些充满活力的电子存在于W50叶中的16微高斯磁场内.
- 这些发现澄清了这个微类星系的发射机制,将其归因于电子而不是质子.
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