在星爆星系M82中,热等离子体和黑洞二进制星系
R E Griffiths1, A Ptak, E D Feigelson
1Department of Physics, Wean Hall, Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA. griffith@astro.phys.cmu.edu
概括
钱德拉X射线天文台的数据显示,Messier 82 (M82) 具有极其热的等离子体,由超新星驱动,为银河系风提供动力. 这项研究确定了紧的X射线源,可能是黑洞系统.
科学领域:
- * 天体物理学 * 天体物理学
- *高能天体物理学 *高能天体物理学
- * 银河系的演化过程
背景情况:
- * Messier 82 (M82) 是一个星爆星系的原型,以强烈的恒星形成而闻名.
- *银河系中的星际介质 (ISM) 通常为1-200万克尔文.
- *超新星爆炸是银河系现象的关键驱动力.
研究的目的:
- *使用高分辨率的X射线观测来研究M82中的热等离子体和能量过程.
- * 描述M82核心中的等离子体温度和分布.
- * 识别和分析M82.2内的紧X射线源.
主要方法:
- *使用了钱德拉X射线天文台上的先进的CCD成像光谱仪.
- *对M82.2进行了高分辨率的X射线观测.
- *分析光谱数据以确定血温度和识别X射线源.
主要成果:
- *发现的等离子体温度约为4万万克尔文,填满了M82.8的内1千帕塞克.
- * 这种等离子体明显比银河系的ISM更热.
- *解析了大约20个紧的X射线源,其中许多被怀疑是高质量的X射线双星,可能含有黑洞.
- * 确定中部区域有过度压力,驱动M82的银河系风.
结论:
- * 超新星爆炸在M82的核心产生极热的,超压的等离子体.
- * 这种等离子体为强大的星系风提供燃料,延伸到星系间介质.
- * M82拥有众多紧的X射线源,表明活跃的高质量X射线二进制星群,包括黑洞候选者.
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