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CAS IR Grid
机构
高能物理研究所 [1]
新疆天文台 [1]
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OAI收割 [2]
内容类型
期刊论文 [2]
发表日期
2021 [2]
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A study on the hysteresis effect and spectral evolution in the mini-outbursts of balck hole X-ray binary XTE J1550-564
期刊论文
OAI收割
Frontiers in Astronomy and Space Sciences, 2021, 卷号: 8, 页码: 37
作者:
Dong, Ai-Jun
;
Liu, Chang
;
Ge, Kang
;
Liu, Xiang
;
Zhi, Qi-Jun
  |  
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2022/06/30
accretion
accretion discs
stars: black holes
X-ray binaries
-X-rays: individual: XTE J1550-564
Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070
期刊论文
OAI收割
Monthly Notices of the Royal Astronomical Society, 2021
作者:
HXMT
  |  
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  |  
浏览/下载:42/0
  |  
提交时间:2022/02/08
black hole physics
Low Mass X-ray Binaries
accretion
accretion
discs
stars: individual (MAXI J1820+070)
Astrophysics - High Energy
Astrophysical Phenomena
Abstract: We present high-speed optical photometry from SAAO and SALT on the black hole LMXB MAXI J1820+070 (ASSASN-18ey), some of it simultaneous with NICER, Swift and Insight-HXMT X-ray coverage. We detect optical Quasi-Periodic Oscillations (QPOs) that move to higher frequencies as the outburst progresses, tracking both the frequency and evolution of similar X-ray QPOs previously reported. Correlated X-ray/optical data reveal a complex pattern of lags, including an anti-correlation and a sub-second lag that evolve over the first few weeks of outburst. They also show correlated components separated by a lag equal to the QPO period roughly centered on zero lag, implying that the inter-band variability is strongly and consistently affected by these QPOs at a constant phase lag of roughly ±Ю The synchronisation of X-ray and optical QPOs indicates that they must be produced in regions physically very close to each other
we thus propose that they can be explained by a precessing jet model, based on analogies with V404 Cyg and MAXI J1348-630.