An Insight-HXMT View of the mHz Quasi-regular Modulation Phenomenon in the Black Hole X-Ray Binary 4U 1630–47

Yang, Zi-Xu; Zhang, L.; Huang, Y.; Bu, Q. C.; Zhang, Zhen; Liu, He-Xin; Yu, Wei; Wang, Pengju; Zhao, Qingchang; Tao, Lian; Qu, J. L.; Zhang, Shu; Zhang, Shuang‐Nan; Song, Liming; Cao, Xuelei; Chen, Li; Cai, C.; Chang, Zhi; Chen, Tianxiang; Chen, Yong; Chen, Yupeng; Chen, Yibao; Cui, Weiwei; Ding, Guoqiang; Du, Yifeng; Gao, G. H.; Ge, M. Y.; Gu, Y. D.; Guan, J.; Guo, Chengcheng; Han, Danxiang; Jia, Haiqiang; Jia, S. M.; Jiang, Weichun; Jin, Jing; Kong, L. D.; Li, Bing; Li, Gang; Li, Wei; Li, Xian; Li, Xufang; Chengkui, Li,; Lin, Lin; Liu, Cong‐Zhan; Li, Ti-Pei; Li, Xiao-Bo; Liang, X. H.; Liao, J. Y.; Liu, Hongwei; Liu, Xiaojing; Lu, X. F.; Luo, Q.; Luo, T.; Binyuan, Ma,; Ma, Ruican; Ma, Xiang; Meng, Bin; Nang, Y.; Nie, J. Y.; Ou, G.; Ren, Xiaokang; Sai, N.; Song, X. Y.; Sun, Liang; Tan, Ying; Tuo, Y. L.; Wang, Chen; Wang, Wenshuai; Wang, Lingjun; Wang, Yusa; Wang, Jie-Shuang; Wen, Xiang-Yang; Wu, B. B.; Wu, B. B.; Wu, Mei‐Hwan; Xiao, Shuo; Xiong, S. L.; Yang, S.; Yang, Yanji; Yi, Q. B.; Yin, Q. Q.; You, Y.; Zhang, Bing; Zhang, Fan; Zhang, Hongmei; Zhang, Juan; Zhang, Wanchang; Zhang, Wei; Zhang, Binbin; Zhang, Peng; Zhang, Yifei; Zhang, Yuanhang; Zhao, H. S.; Zhao, Xiaofan; Zheng, S.; Zhou, D. K.

doi:10.3847/1538-4357/ac84d6

Cited by 4 publications

(2 citation statements)

References 80 publications

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“…We determined the rms over the 1/32-32 Hz frequency range, accounting for the background influence as detailed in Belloni & Hasinger (1990). We calculated the QPO phase lags using the method of Vaughan & Nowak (1997) and Yang et al (2022). Essential information about QPOs can be found in Table 3, with all reported errors provided at the 1σ level.…”

Section: Timing and Spectral Analysismentioning

confidence: 99%

Timing and Spectral Analysis of the Black Hole X-Ray Binary MAXI J1803-298 with Insight-HXMT Data

Xu,

Qu,

Méndez

et al. 2024

Res. Astron. Astrophys.

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We present a comprehensive analysis of the 2021 outburst of MAXI J1803–298 utilizing observations of the Insight-Hard X-ray Modulation Telescope (Insight-HXMT) spanning from the low hard state to the high soft state. Within the Insight-HXMT dataset, compared to the previous work, we identify a more prolonged presence of type-C quasi-periodic oscillations (QPOs) with centroid frequencies ranging from ∼0.16 to 6.3 Hz, which present correlations with the hardness ratio and the photon index of the Comptonized component. For QPO frequencies less than ∼2 Hz, the QPO phase lags are hard (photons of 10–19 keV arrive later than those of 1–4 keV), while at higher frequencies, lags transition to soft lags after reaching ∼4 Hz. Furthermore, the spectra in all Insight-HXMT observations consist of a multi-color blackbody component and a Comptonized component, as commonly observed in classical black-hole X-ray binaries. We analyze state transitions and the evolution of accretion geometry in this work. The fitted inner disk radius increases abnormally during the low hard state, hypothesized to result from the corona condensing onto the inner disk. Additionally, two significant drops in flux are observed during the soft intermediate state, maybe implying changes in the corona/jet and the disk, respectively.

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Section: Timing and Spectral Analysismentioning

confidence: 99%

Timing and Spectral Analysis of the Black Hole X-Ray Binary MAXI J1803-298 with Insight-HXMT Data

Xu,

Qu,

Méndez

et al. 2024

Res. Astron. Astrophys.

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“…04; (2) Earth elevation angle larger than 10 • ; (3) the value of the geomagnetic cutoff rigidity larger than 8 GV; (4) at least 300 s before and after the South Atlantic Anomaly passage. To avoid possible contamination from the bright Earth and nearby sources, we only use data from the small field of view detectors (Chen et al 2018;Yang et al 2022). The energy bands adopted for spectral analysis are 2-10 keV for LE, 8-28 keV for ME, and 28-120 keV for HE.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

A Timing View of the Additional High-energy Spectral Component Discovered in the Black Hole Candidate Swift J1727.8-1613

Yang,

Zhang,

Zhang

et al. 2024

ApJL

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We present an energy-dependent analysis for the type-C quasiperiodic oscillations (QPOs) observed in the black hole X-ray binary Swift J1727.8–1613 using Insight-HXMT observations. We find that the QPO fractional rms at energies above 40 keV is significantly higher than that below 20 keV. This is the first report of a high energy (HE) rms excess in the rms spectrum of a black hole X-ray binary. In the high energy band, an extra hard component is observed in addition to the standard thermal Comptonization component at a similar energy band. The value of the QPO HE rms excess is not only correlated with the disk parameters and the photon index of the standard Comptonization component but also exhibits a moderate positive correlation with the flux of the additional hard spectral component. No features in the QPO phase-lag spectra are seen corresponding to the additional hard component. We propose that the additional hard component in the spectrum may originate from jet emission and the associated QPO HE rms excess can be explained by the precession of the jet base.

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The mHz quasi-regular modulations of 4U 1630−47 during its 1998 outburst

Zhao

Yin

Tao

et al. 2023

Monthly Notices of the Royal Astronomical Society

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We present the results of a detailed timing and spectral analysis of the quasi-regular modulation (QRM) phenomenon in the black hole X-ray binary 4U 1630–47 during its 1998 outburst observed by Rossi X-ray Timing Explore (RXTE). We find that the ∼ 50-110 mHz QRM is flux dependent, and the QRM is detected with simultaneous low frequency quasi-periodic oscillations (LFQPOs). According to the behavior of the power density spectrum, we divide the observations into four groups. In the first group, namely behavior A, LFQPOs are detected, but no mHz QRM. The second group, namely behavior B, a QRM with frequency above ∼ 88 mHz is detected and the ∼ 5 Hz and ∼ 7 Hz LFQPOs are almost overlapping. In the third group, namely behavior C, the QRM frequency below ∼ 88 mHz is detected and the LFQPOs are significantly separated. In the forth group, namely behavior D, neither QRM nor LFQPOs are detected. We study the energy-dependence of the fractional rms, centroid frequency, and phase-lag of QRM and LFQPOs for behavior B and C. We then study the evolution of QRM and find that the frequency of QRM increases with hardness, while its rms decreases with hardness. We also analyze the spectra of each observation, and find that the QRM rms of behavior B has a positive correlation with $\rm F_{\rm powerlaw}$ / $\rm F_{\rm total}$. Finally, we give our understanding for this mHz QRM phenomena.

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An Insight-HXMT View of the mHz Quasi-regular Modulation Phenomenon in the Black Hole X-Ray Binary 4U 1630–47

Cited by 4 publications

References 80 publications

Timing and Spectral Analysis of the Black Hole X-Ray Binary MAXI J1803-298 with Insight-HXMT Data

Timing and Spectral Analysis of the Black Hole X-Ray Binary MAXI J1803-298 with Insight-HXMT Data

A Timing View of the Additional High-energy Spectral Component Discovered in the Black Hole Candidate Swift J1727.8-1613

The mHz quasi-regular modulations of 4U 1630−47 during its 1998 outburst

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