A comparative study on the spectra of normal outburst and mini-outbursts of black hole X-ray binary XTE J1550-564
Wei-Long He
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Search for more papers by this authorXue-Kun Zhang
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Search for more papers by this authorWei-Jia Yang
Faculty of Innovation Engineering, Macau University of Science and Technology, Macau, China
Search for more papers by this authorCorresponding Author
Ai-Jun Dong
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Correspondence
Ai-Jun Dong, School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China.
Email: [email protected]
Search for more papers by this authorKang Ge
Physics Group, Anshun National Middle School, Anshun, China
Search for more papers by this authorWei-Long He
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Search for more papers by this authorXue-Kun Zhang
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Search for more papers by this authorWei-Jia Yang
Faculty of Innovation Engineering, Macau University of Science and Technology, Macau, China
Search for more papers by this authorCorresponding Author
Ai-Jun Dong
School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China
Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
Correspondence
Ai-Jun Dong, School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China.
Email: [email protected]
Search for more papers by this authorKang Ge
Physics Group, Anshun National Middle School, Anshun, China
Search for more papers by this authorAbstract
One normal outburst and three mini-outbursts have been detected by Rossi X-ray Timing Explorer (RXTE) satellite after 2000 in the well-known black hole X-ray binary XTE J1550-564. In our work, we explored the energy spectral properties of the four outbursts and the three mini-outbursts retained in the Low/Hard state. The results show that the X-ray spectra of the three mini-outbursts are harder than that of normal outburst and have no disk component. In the correlation analysis, the anti-relationship of the three mini-outbursts suggested that it may be a result of the incomplete evolutionary success of Shakura-Sunyaev disk. The whole X-ray spectral correlation evolution shows well the state transition from the Shakura-Sunyaev disk to the advection-dominated accretion flow. We think that the three mini-outbursts may originated from a small discrete accretion event.
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