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一个400太阳质量的黑洞在银河系M82中
Dheeraj R Pasham1, Tod E Strohmayer2, Richard F Mushotzky3
11] Astronomy Department, University of Maryland, College Park, Maryland 20742, USA [2] Astrophysics Science Division and Joint Space-Science Institute, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
Nature
|August 19, 2014
概括
研究人员在M82 X-1中发现了稳定的X射线准周期性振荡,这是一个中等质量的黑洞. 这一发现为这个黑洞提供了更准确的质量估计,大约为428个太阳质量.
科学领域:
- 天体物理学 天体物理学
- X射线天文学X射线天文学
- 黑洞物理学 黑洞物理学
背景情况:
- M82 X-1是银河系M82中最亮的X射线源,此前估计为质量中等的黑洞 (100-10,000太阳质量),质量不确定性很大.
- 以前的质量估计依赖于低频时间尺度,引入了很大的不确定性.
研究的目的:
- 为了更准确地确定中等质量的黑洞M82 X-1的质量.
- 研究高频准周期性振荡的潜力,以精确确定黑洞质量.
主要方法:
- 检测和分析来自M82 X-1的高频 (3:2比) X射线准周期性振荡 (QPOs).
- 在恒星质量黑洞中观察到的逆质量缩放关系的推断到M82 X-1.
- 应用相对论 precession 模型用于质量估计.
主要成果:
- 从M82 X-1.1发现3.32 ± 0.06 Hz和5.07 ± 0.06 Hz的稳定双峰X射线QPOs.
- 估计M82 X-1黑洞的质量为428±105太阳质量,使用反向质量缩放.
- 估计M82 X-1黑洞的质量为415±63太阳质量,使用相对论前行模型.
结论:
- 稳定的高频QPO为估计中等质量黑洞质量提供了一种不那么模糊的方法.
- 据可靠估计,M82 X-1的质量约为400-430个太阳质量,这证实了它的中间质量状态.
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