The Accretion Flow Geometry of MAXI J1820+070 through Broadband Noise Research with Insight Hard X-ray Modulation Telescope

Yang, Zi-Xu; Zhang, Liang; Bu, Q. C.; Huang, Y.; Liu, He-Xin; Yu, Wei; Wang, P. J.; Tao, Lian; Qu, J. L.; Zhang, Shouchun; Zhang, Shuang‐Nan; Ma, Xiang; Song, Liming; Jia, S.; Ge, M. Y.; Yan, Jing-Zhi; Zhou, D. K.; Li, T. M.; Wu, B. Y.; Ren, Xiaokang; Ma, Ruican; Xu, Yanjun; Y., B.; Du, Yifeng; Fu, Yang; Xiao, Y X

doi:10.3847/1538-4357/ac63af

Cited by 16 publications

(12 citation statements)

References 97 publications

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“…Meanwhile, it should be noted that the mHz QRM peak is broad, and its rms or frequency could be affected by the variation of the underlying broad band noise component. In particular, a strong energy dependence of the broad band noise component has been found in previous studies (Yang et al 2022;Feng et al 2022).…”

Section: Timing Analysissupporting

confidence: 70%

An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47

Yang¹,

Zhang²,

Huang³

et al. 2022

Preprint

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Here we report the spectral-timing results of the black hole X-ray binary 4U 1630-47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope (Insight-HXMT). Type-C quasi-periodic oscillations (QPOs) in ∼1.6-4.2 Hz and quasi-regular modulation (QRM) near 60 mHz are detected during the outburst. The mHz QRM has a fractional rms of ∼10%-16% in the 8-35 keV energy band with a Q factor (frequency/width) of ∼2-4. Benefiting from the broad energy band of Insight-HXMT, we study the energy dependence of the ∼60 mHz QRM in 1-100 keV for the first time. We find that the fractional rms of the mHz QRM increases with photon energy, while the time lags of the mHz QRM are soft and decrease with photon energy. Fast recurrence of the mHz QRM, in a timescale of less than one hour, has been observed during the outburst. During this period, the corresponding energy spectra moderately change when the source transitions from the QRM state to the non-QRM state. The QRM phenomena also shows a dependence with the accretion rate. We suggest that the QRM could be caused by an unknown accretion instability aroused from the corona.

show abstract

Section: Timing Analysissupporting

confidence: 70%

An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47

Yang¹,

Zhang²,

Huang³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Meanwhile, it should be noted that the mHz QRM peak is broad, and its rms or frequency could be affected by the variation of the underlying broadband noise component. In particular, a strong energy dependence of the broadband noise component has been found in previous studies (Yang et al 2022;Feng et al 2022).…”

Section: Timing Analysissupporting

confidence: 69%

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

Yang

Zhang

Huang

et al. 2022

ApJ

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Here we report the spectral-timing results of the black hole X-ray binary 4U 1630–47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope (Insight-HXMT). Type C quasi-periodic oscillations (QPOs) in ∼1.6–4.2 Hz and quasi-regular modulation (QRM) near 60 mHz are detected during the outburst. The mHz QRM has a fractional rms of ∼10%–16% in the 8–35 keV energy band with a Q factor (frequency/width) of ∼2–4. Benefiting from the broad energy band of Insight-HXMT, we study the energy dependence of the ∼60 mHz QRM in 1–100 keV for the first time. We find that the fractional rms of the mHz QRM increases with photon energy, while the time lags of the mHz QRM are soft and decrease with photon energy. Fast recurrence of the mHz QRM, in a timescale of less than 1 hr, has been observed during the outburst. During this period, the corresponding energy spectra moderately change when the source transitions from the QRM state to the non-QRM state. The QRM phenomenon also shows a dependence with the accretion rate. We suggest that the QRM could be caused by an unknown accretion instability aroused from the corona.

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“…The PDS of NICER show very similar shapes, while the shape of Insight-HXMT PDS at high frequency evolves with energy. The detailed properties of the broadband noise have been studied in Yang et al (2022) and are thus excluded from our work.…”

Section: Power Density Spectramentioning

confidence: 99%

A Detailed View of Low-frequency Quasi-periodic Oscillation in the Broadband 0.2–200 keV with Insight-HXMT and NICER

Zhang

Tao

et al. 2023

ApJ

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We report the X-ray timing results of the black hole candidate MAXI J1820+070 during its 2018 outburst using the Hard X-ray Modulation Telescope (Insight-HXMT) and Neutron Star Interior Composition Explorer Mission (NICER) observations. Low-frequency quasi-periodic oscillations (LFQPOs) are detected in the low/hard state and the hard intermediate state, which lasted for ∼90 days. Thanks to the large effective area of Insight-HXMT at high energies and NICER at low energies, we are able to present the energy dependence of the LFQPO characteristics and phase lags from 0.2 to 200 keV, which has never been explored by previous missions. We find that the centroid frequency of the LFQPOs does not change significantly with energy, while the full width at half maximum and fractional rms show a complex evolution with energy. The LFQPO phase lags at high energies and low energies show consistent energy-dependence relations taking the ∼2 keV as reference. Our results suggest that the LFQPOs from high energy come from the LT precession of the relativistic jet, while the low-energy radiation is mainly from the perpendicular innermost regions of the accretion disk.

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The Accretion Flow Geometry of MAXI J1820+070 through Broadband Noise Research with Insight Hard X-ray Modulation Telescope

Cited by 16 publications

References 97 publications

An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47

An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47

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

A Detailed View of Low-frequency Quasi-periodic Oscillation in the Broadband 0.2–200 keV with Insight-HXMT and NICER

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