标题： NuSTAR 对 M82 中超亮 X 射线源的准周期振荡的研究 显示英文标题

标题： A NuSTAR study of quasi-periodic oscillations from the ultraluminous X-ray sources in M82

摘要： 对X射线双星中的拟周期振荡的研究为理解致密天体周围的吸积物理提供了宝贵的见解。M82星系中存在两个超亮X射线源(ULXs)，其中一个疑似包含一个中等质量黑洞。我们利用2014年至2024年间获得的39次NuSTAR观测数据，研究了M82中的非周期X射线变异性。特别是，我们详细研究了M82 X-1的拟周期振荡(QPO)在20至300毫赫范围内的演化。除了低频处频繁出现的一个宽噪声成分外，我们在数据中没有发现其他定时特征。QPO的行为与其他吸积致密天体（包括黑洞和中子星）中的低频振荡类相似。 显示英文摘要

摘要： The study of quasi-periodic oscillations in X-ray binaries provides valuable insights into the physics of accretion around compact objects. The M82 galaxy hosts two ultraluminous X-ray sources (ULXs), one of which is suspected to harbor an intermediate-mass black hole. Using 39 NuSTAR observations acquired between 2014--2024, we investigate the aperiodic X-ray variability in M82. In particular, we study in detail the evolution of the QPO from M82 X-1 in the range 20--300 mHz. We do not find additional timing features in the data, besides a frequent broad noise component at lower frequencies. The QPO behaves similarly to other classes of low-frequency oscillations in accreting compact objects, both black holes and neutron stars.