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Origin of power-law X-ray emission in the steep power-law state of X-ray binaries |
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| Authors: | Li-Hong Yan Jian-Cheng Wang Yunnan Observatory /National Astronomical Observatories Key Laboratory for the Structure Evolution of Celestial Objects Chinese Academy of Sciences Kunming China Graduate School of Chinese Academy of Sciences Beijing China |
| Institution: | Li-Hong Yan1,2 and Jian-Cheng Wang1 1 Yunnan Observatory /National Astronomical Observatories,Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650011,China 2 Graduate School of Chinese Academy of Sciences,Beijing 100049,China |
| Abstract: | We present a new explanation for the origin of the steep power-law(SPL) state of X-ray binaries.The power-law component of X-ray emission is the synchrotron radiation of relativistic electrons in highly magnetized compact spots orbiting near the inner stable circular orbit of a black hole.It has a hard spectrum that extends to above MeV energies,which is determined by the electron acceleration rate.These photons are then down-scattered by the surrounding plasma to form an observed steep spectrum.We discuss ... |
| Keywords: | accretion accretion disks-black hole physics-radiation mechanisms:nonthermal-X-rays:binaries |
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