NICER Spectral and Timing Analysis of 4U 1630$-$47 and its Heartbeat State

Abstract

We present a spectral and timing analysis of NICER observations of the black hole X-ray binary 4U 1630-47 from 2018 to 2024. We find relativistic reflection features in the hard and soft intermediate states, and disk wind absorption features in the soft intermediate state and soft state. We fit the reflection features with relxillCP and find a stable and untruncated disk in the intermediate states; we fit the wind features with XSTAR and find a stable, highly ionized wind with high column density across different outbursts. Specifically, the heartbeat state is seen in two observations in 2021 and 2023 respectively. Through the phase-resolved spectral fitting, we find the flux of the source to be correlated with the disk parameters while no strong correlation with the coronal parameters is observed, consistent with the scenario given by the inner disk radiation pressure instability. A hard lag on the time scale of 1 s and high coherence is observed near the characteristic frequency of the heartbeat, which can be explained by the viscous propagation of mass accretion fluctuations in the disk. The positive relationship between the heartbeat fractional rms and energy can possibly be explained by a disk-originated oscillation which is then magnified by the corona scattering.

arXiv comment18 pages, 19 figures. v2: refereed version

References in corpus (53)

• On the Absorption of X-rays in the Interstellar Medium
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Modelling the behaviour of accretion flows in X-ray binaries
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
• The evolution of black hole states
• Multi-Temperature Blackbody Spectrum of a Thin Accretion Disk around a Kerr Black Hole: Model Computations and Comparison with Observations
• The ABC of low-frequency quasi-periodic oscillations in Black-Hole Candidates: analogies with Z-sources
• A review of quasi-periodic oscillations from black hole X-ray binaries: observation and theory
• States and transitions in black-hole binaries
• The Constant Inner-Disk Radius of LMC X-3: A Basis for Measuring Black Hole Spin
• A unified model for the spectral variability in GRS 1915+105
• An Empirical Background Model for the NICER X-ray Timing Instrument
• The causal connection between disc and power-law variability in hard state black hole X-ray binaries
• Testing Accretion Disk Theory in Black Hole X-ray Binaries
• The Three Spectral Regimes Found in the Stellar Black Hole XTE J1550--564 in its High/Soft State
• Spectral and temporal properties of Compton scattering by mildly relativistic thermal electrons
• The Physics of the 'Heartbeat' State of GRS 1915+105
• Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
• On the determination of the spin and disc truncation of accreting black holes using X-ray reflection
• MAXI J1820+070 with NuSTAR I. An increase in variability frequency but a stable reflection spectrum: coronal properties and implications for the inner disc in black hole binaries
• Disc tearing: implications for black hole accretion and AGN variability
• Disk, Corona, Jet Connection in the Intermediate State of MAXI J1820+070 Revealed by NICER Spectral-Timing Analysis
• Accretion Disk Spectra of the Ultra-luminous X-ray Sources in Nearby Spiral Galaxies and Galactic Superluminal Jet Sources
• The Disk Wind in the Rapidly Spinning Stellar-Mass Black Hole 4U 1630-472 Observed with NuSTAR
• Revealing accretion onto black holes: X-ray reflection throughout three outbursts of GX 339-4
• The evolution of GX 339-4 in the low-hard state as seen by NuSTAR and Swift
• The Accretion Disk Wind in the Black Hole GRS 1915+105
• Black hole mass determination in the X-ray binary 4U 1630--47: Scaling of spectral and variability characteristics
• XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
• Power-Colours: Simple X-ray Binary Variability Comparison
• A timing study of MAXI J1820+070 based on Swift/XRT and NICER monitoring in 2018/19
• Radiation Pressure and Mass Ejection in Rho-like States of GRS 1915+105
• RXTE observations of 4U 1630-47 during the peak of its 1998 outburst
• X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario
• Disk-Wind Connection During the Heartbeats of GRS 1915+105
• A Comprehensive Chandra Study of the Disk Wind in the Black Hole Candidate 4U 1630-472
• Chandra high-resolution spectra of 4U~1630-47: the disappearance of the wind
• IXPE and NICER view of Black hole X-ray binary 4U 1630-47: First significant detection of polarized emission in thermal state
• AstroSat and Chandra view of the high soft state of 4U 1630-47 (4U 1630-472): evidence of the disk wind and a rapidly spinning black hole
• Missing hard states and regular outbursts: the puzzling case of the black hole candidate 4U 1630-472
• The hard to soft transition of GX 339-4 as seen by Insight-HXMT
• X-ray Spectral and Timing evolution of MAXI J1727-203 with NICER
• The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT
• AstroSat view of IGR J17091-3624 and GRS 1915+105: decoding the 'pulse' in the 'Heartbeat State'
• Time-resolved spectroscopy on the heartbeat state of GRS 1915+105 using AstroSat
• An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47
• Disc-corona interaction in the heartbeat state of GRS 1915+105
• The disk wind in GRS 1915+105 as seen by Insight-HXMT
• Variable ionized disk wind in MAXI J1803-298 revealed by NICER
• The 2018 outburst of MAXI J1820+070 as seen by Insight-HXMT
• Evidence for a dynamic corona in the short-term time lags of black hole X-ray binary MAXI J1820+070
• The QPO states of 4U 1630-47