Bifurcation timescales in power spectra of black hole binaries and ultraluminous X-ray sources

被引：0
作者：
TaiShan Wang
TiPei Li
机构：
[1] Tsinghua University,Department of Physics & Center for Astrophysics
[2] Chinese Academy of Sciences,Key Laboratory of Particle Astrophysics, Institute of High Energy Physics
来源：
Science China Physics, Mechanics and Astronomy | 2010年 / 53卷
关键词：
black hole binary; ultraluminous X-ray source; power spectral density; data analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
For black hole binaries (BHBs) and active galactic nuclei (AGNs), bifurcation timescales (BTs) Δtb exist, below which time-domain power is significantly higher than the corresponding Fourier power. Quasi-periodic oscillations (QPOs) are removed from the Fourier spectra of BHBs. A relationship between BT, black hole mass and bolometric luminosity is derived. Strong anti-correlation between BT and luminosity of Cyg X-1 is found. After removing the QPOs, BTs are also obtained for two ultraluminous X-ray sources (ULXs), M82 X-1 and NGC5408 X-1. The results support that they harbor intermediate mass black holes (IMBHs).
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页码：177 / 182
页数：5
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