Insight-HXMT, NuSTAR and INTEGRAL Data Show Disk Truncation in the Hard State of the Black-Hole X-Ray Binary MAXI J1820+070

Abstract

We study X-ray and soft gamma-ray spectra from the hard state of the accreting black-hole binary MAXI J1820+070. We perform analysis of joint spectra from HXMT, NuSTAR and INTEGRAL. We find an overall agreement between the spectra from all three satellites. Satisfactory fits to the data require substantial spectral complexity, with our models including two Comptonization regions and their associated disk reflection, a disk blackbody and a narrow Fe K$\alpha$ line. Our fits confirm the presence of the truncation of the reflecting optically-thick disk at least at $>$10 gravitational radii. However, we find that the HXMT data alone cannot significantly constrain the disk inner radii.

ApJ, in press, 10 pages

References in corpus (14)

• Modelling the behaviour of accretion flows in X-ray binaries
• The corona contracts in a black-hole transient
• Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
• A radio parallax to the black hole X-ray binary MAXI J1820+070
• Properties of AGN coronae in the NuSTAR era II: hybrid plasma
• The binary mass ratio in the black hole transient MAXI J1820+070
• The synchrotron boiler and the spectral states of black hole binaries
• On the origin of spectral states in accreting black holes
• Disk, Corona, Jet Connection in the Intermediate State of MAXI J1820+070 Revealed by NICER Spectral-Timing Analysis
• Insight-HXMT observations of jet-like corona in a black hole X-ray binary MAXI J1820+070
• Accretion Geometry in the Hard State of the Black-Hole X-Ray Binary MAXI J1820+070
• The Varying Kinematics of Multiple Ejecta from the Black Hole X-ray Binary MAXI J1820+070
• The evolution of the broadband temporal features observed in the black-hole transient MAXI J1820+070 with Insight-HXMT
• Spectral signature of mass outflow in Two Component Advective Flow Paradigm

Cited by in corpus (13)

• MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries
• High-density reflection spectroscopy of black hole X-ray binaries in the hard state
• Accretion Scenario of MAXI J1820+070 during 2018 Outbursts with Multi-mission Observations
• Can observations of 511 keV line from the M31 galaxy shed light on the AGN jet composition?
• A multi-wavelength study of the hard and soft states of MAXI J1820+070 during its 2018 outburst
• X-ray spectral correlations in a sample of Low-mass black hole X-ray binaries in the hard state
• A possible overall scenario for the outburst evolution of MAXI J1820+070 revealed by Insight-HXMT
• A moderate spin for the black hole in X-ray binary MAXI J1348-630 revealed by Insight-HXMT
• A NuSTAR and Swift View of the Hard State of MAXI J1813-095
• Proof of principle X-ray reflection mass measurement of the black hole in H1743-322
• The spectral-timing analysis of Cygnus X-1 with Insight-HXMT
• The 2018 outburst of MAXI J1820+070 as seen by Insight-HXMT
• In-orbit performance of LE onboard Insight-HXMT in the first 5 years