The accretion flow geometry of MAXI J1820+070 through broadband noise research with Insight-HXMT

Abstract

Here we present a detailed study of the broadband noise in the power density spectra of the black hole X-ray binary MAXI J1820+070 during the hard state of its 2018 outburst, using the Hard X-ray Modulation Telescope (Insight-HXMT) observations. The broadband noise shows two main humps, which might separately correspond to variability from a variable disk and two Comptonization regions. We fitted the two humps with multiple Lorentzian functions and studied the energy-dependent properties of each component up to 100--150 keV and their evolution with spectral changes. The lowest frequency component is considered as the sub-harmonic of QPO component and shows different energy dependence compared with other broadband noise components. We found that although the fractional rms of all the broadband noise components mainly decrease with energy, their rms spectra are different in shape. Above $\sim$ 20--30 keV, the characteristic frequencies of these components increase sharply with energy, meaning that the high-energy component is more variable on short timescales. Our results suggest that the hot inner flow in MAXI J1820+070 is likely to be inhomogeneous. We propose a geometry with a truncated accretion disk, two Comptonization regions.

References in corpus (38)

• The NumPy array: a structure for efficient numerical computation
• X-ray Properties of Black-Hole Binaries
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• Modelling the behaviour of accretion flows in X-ray binaries
• A review of quasi-periodic oscillations from black hole X-ray binaries: observation and theory
• The corona contracts in a black-hole transient
• An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070
• A radio parallax to the black hole X-ray binary MAXI J1820+070
• Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
• The binary mass ratio in the black hole transient MAXI J1820+070
• Fast variability from black-hole binaries
• Spectral and Fourier analyses of X-ray QPO in accreting black holes
• A rapid change in X-ray variability and a jet ejection in the black hole transient MAXI J1820+070
• Where is the Radiation Edge in Magnetized Black Hole Accretion discs?
• Accretion Geometry in the Hard State of the Black-Hole X-Ray Binary MAXI J1820+070
• Estimating the black hole spin for the X-ray binary MAXI J1820+070
• A full spectral-timing model to map the accretion flow in black hole binaries: the low/hard state of MAXI J1820+070
• Propagating mass accretion rate fluctuations in X-ray binaries under the influence of viscous diffusion
• The Evolution of the Phase Lags Associated with the Type-C Quasi-periodic Oscillation in GX 339--4 during the 2006/2007 Outburst
• Modelling hard and soft state of Cygnus X-1 with propagating mass accretion rate fluctuations
• A timing study of MAXI J1820+070 based on Swift/XRT and NICER monitoring in 2018/19
• Modelling the cross-spectral variability of the black hole binary MAXI J1659-152 with propagating accretion rate fluctuations
• Insight-HXMT observations of 4U~1636-536: Corona cooling revealed with single short type-I X-ray burst
• Physical origin of the nonphysical spin evolution of MAXI J1820+070
• The evolution of the X-ray phase lags during the outbursts of the black hole candidate GX 339-4
• The evolution of the broadband temporal features observed in the black-hole transient MAXI J1820+070 with Insight-HXMT
• Hybrid Comptonization and Electron-Positron Pair Production in the Black-Hole X-Ray Binary MAXI J1820+070
• Broadband aperiodic variability in X-ray pulsars: accretion rate fluctuations propagating under the influence of viscous diffusion
• Fast variability as a probe of the smallest regions around accreting black holes
• A spectrally stratified hot accretion flow in the hard state of MAXI J1820+070
• Evolution of the hot flow of MAXI J1543-564
• The aperiodic X-ray variability of the accreting millisecond pulsar SAX J1808.4-3658
• Timing analysis of the black hole candidate EXO 1846-031 with Insight-HXMT monitoring
• The Donor of the Black-Hole X-Ray Binary MAXI J1820+070
• Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070
• Investigating the Theory of Propagating Fluctuations with Numerical Models of Stochastic Accretion Discs
• Detection of distinct power spectra in soft and hard X-ray bands in the hard state of GRS 1915+105
• Low frequency QPOs and possible change in the accretion geometry during the outbursts of Aquila X$-$1

Cited by in corpus (10)

• Transitions and Origin of the Type-B Quasi-Periodic Oscillation in the Black Hole X-ray Binary MAXI~ J1348--630
• MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries
• A detailed view of low-frequency quasi-periodic oscillation in the broadband 0.2-200 keV with Insight-HXMT and NICER
• Chasing the break: Tracing the full evolution of a black hole X-ray binary jet with multi-wavelength spectral modeling
• A Phase-resolved View of the Low-frequency Quasiperiodic Oscillations from the Black Hole Binary MAXI J1820+070
• Hilbert-Huang Transform analysis of quasi-periodic oscillations in MAXI J1820+070
• An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47
• Broad-band noises in GX 339-4 during the 2021 outburst observed with Insight-HXMT and NICER
• Black holes: accretion processes in X-ray binaries
• Optical and X-ray timing analysis of the 2018-2020 outburst and rebrightening of the black-hole transient MAXI J1820+070