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	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 \| 收藏 \| 浏览/下载：52/0 \| 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.
	Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat 期刊论文 OAI收割 Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40 作者: HXMT \| 收藏 \| 浏览/下载：56/0 \| 提交时间：2022/02/08 Accretion accretion disks Black hole physics X-rays: binaries: Swift J1658.2-4242 Astrophysics - High Energy Astrophysical Phenomena Abstract: We present the observational results from a detailed timing analysis of the black hole candidate Swift J1658.2-4242 during its 2018 outburst with the observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250 keV. The evolution of intensity, hardness and integrated fractional root mean square (rms) observed by Insight-HXMT and NICER are presented in this paper. Type-C quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5 Hz) and Insight-HXMT (1-1.6 Hz) are also reported in this work. The features of the QPOs are analyzed with an energy range of 0.5-50 keV. The relations between QPO frequency and other characteristics such as intensity, hardness and QPO rms are carefully studied. The timing and spectral properties indicate that Swift J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the source calculated from the simultaneous observation of Insight-HXMT, NICER and AstroSat support the Lense-Thirring origin of the QPOs. The relation between QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence follows the same trend as the high inclination galactic black hole binaries such as MAXI J1659-152.
	Identification and Analysis of High-Frequency Oscillations in the Eyewalls of Tropical Cyclones 期刊论文 OAI收割 ADVANCES IN ATMOSPHERIC SCIENCES, 2015, 卷号: 32, 期号: 5, 页码: 624-634 作者: Chen Shumin; Lu, Youyu; Li Weibiao; Wen Zhiping 收藏 \| 浏览/下载：16/0 \| 提交时间：2016/11/02 tropical cyclone high-frequency oscillations eyewall intensity
	Identification and Analysis of High-Frequency Oscillations in the Eyewalls of Tropical Cyclones 期刊论文 OAI收割 ADVANCES IN ATMOSPHERIC SCIENCES, 2015, 卷号: 32, 期号: 5, 页码: 624-634 作者: Chen Shumin; Lu, Youyu; Li Weibiao; Wen Zhiping 收藏 \| 浏览/下载：23/0 \| 提交时间：2016/11/02 tropical cyclone high-frequency oscillations eyewall intensity
	Dissociated behavior of low-frequency responses and high-frequency oscillations after systemic morphine administration in conscious rats 期刊论文 OAI收割 NEUROREPORT, 2010, 卷号: 21, 期号: 1, 页码: 2-7 作者: Li, Guo-Liang; Qiao, Zhi-Mei; Han, Ji-Sheng; Luo, Fei 收藏 \| 浏览/下载：29/0 \| 提交时间：2015/09/14 conscious rat electrical stimulation high-frequency oscillations morphine somatosensory-evoked potentials