A variable ionized disk wind in the black-hole candidate EXO 1846-031

Abstract

After 34 years, the black-hole candidate EXO 1846-031 went into outburst again in 2019. We investigate its spectral properties in the hard intermediate and the soft states with NuSTAR and Insight-HXMT. A reflection component has been detected in the two spectral states but possibly originating from different illumination spectra: in the intermediate state, the illuminating source is attributed to a hard coronal component, which has been commonly observed in other X-ray binaries, whereas in the soft state the reflection is probably produced by the disk self-irradiation. Both cases support EXO 1846-031 as a low inclination system of ~40 degrees. An absorption line is clearly detected at ~7.2 keV in the hard intermediate state, corresponding to a highly ionized disk wind (log ξ > 6.1) with a velocity up to 0.06c. Meanwhile, quasi-simultaneous radio emissions have been detected before and after the X-rays, implying the co-existence of disk winds and jets in this system. Additionally, the observed wind in this source is potentially driven by magnetic forces. The absorption line disappeared in the soft state and a narrow emission line appeared at ~6.7 keV on top of the reflection component, which may be evidence for disk winds, but data with the higher spectral resolution are required to examine this.

arXiv commentAccepted for publication in ApJ

References in corpus (49)

• On the Absorption of X-rays in the Interstellar Medium
• X-ray Properties of Black-Hole Binaries
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Dynamics of line-driven disk winds in Active Galactic Nuclei
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Going with the flow: can the base of jets subsume the role of compact accretion disk coronae?
• Super-critically accreting stellar-mass black holes as ultraluminous X-ray sources
• The Properties of X-Ray and Optical Light Curves of X-Ray Novae
• X-ray reverberation around accreting black holes
• Non-linear X-ray variability in X-ray binaries and active galaxies
• Ubiquitous equatorial accretion disc winds in black hole soft states
• Relativistic X-ray Lines from the Inner Accretion Disks Around Black Holes
• Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes
• The role of the reflection fraction in constraining black hole spin
• Overview to the Hard X-ray Modulation Telescope (Insight-HXMT) Satellite
• States and transitions in black-hole binaries
• The magnetic nature of disk accretion onto black holes
• Spectral evolution of magnetic flares and time lags in accreting black hole sources
• The Accretion Disk Wind in the Black Hole GRO J1655-40
• Normalizing a Relativistic Model of X-ray Reflection: The Definition of the Reflection Fraction and its Implementation in relxill
• X-ray Reflection Spectroscopy of the Black Hole GX 339-4: Exploring the Hard State with Unprecedented Sensitivity
• Relativistic Lines and Reflection from the Inner Accretion Disks Around Neutron Stars
• Simultaneous Chandra and RXTE Spectroscopy of the Microquasar H~1743-322: Clues to Disk Wind and Jet Formation from a Variable Ionized Outflow
• The Medium Energy (ME) X-ray telescope onboard the Insight-HXMT astronomy satellite
• The EXOSAT data on GX 339-4: further evidence for an ``intermediate'' state
• Fast variability as a tracer of accretion regimes in black hole transients
• On the role of the UV and X-ray radiation in driving a disk wind in X-ray binaries
• GRS 1915+105 in "Soft State": Nature of Accretion Disk Wind and Origin of X-Ray Emission
• On the determination of the spin and disc truncation of accreting black holes using X-ray reflection
• Evidence for simultaneous jets and disk winds in luminous low-mass X-ray binaries
• The Disk-Wind-Jet Connection in the Black Hole H 1743-322
• X-Ray Spectral and Timing Evolution During the Decay of the 1998 Outburst from the Recurrent X-Ray Transient 4U 1630-47
• Absorption lines from magnetically-driven winds in X-ray binaries
• XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
• A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031
• Evidence for Returning Disk Radiation in the Black Hole X-ray Binary XTE J1550-564
• The thermal-radiative wind in low mass X-ray binary H 1743-322; Radiation hydrodynamic simulations
• Disk reflection and a possible disk wind during a soft X-ray state in the neutron star low-mass X-ray binary 1RXS J180408.9-342058
• 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
• Interplay between heartbeat oscillations and wind outflow in microquasar IGR J17091-3624
• A Comprehensive Chandra Study of the Disk Wind in the Black Hole Candidate 4U 1630-472
• Studying the Reflection Spectra of the New Black Hole X-ray Binary Candidate MAXI J1631-479 Observed by NuSTAR: A Variable Broad Iron Line Profile
• An Ultra-Fast X-ray Disk Wind in the Neutron Star Binary GX 340+0
• The thermal-radiative wind in the neutron star low mass X-ray binary GX 13+1
• The reflection component in the average and heartbeat spectra of the black-hole candidate IGR J17091-3642 during the 2016 outburst
• Study of the X-ray properties of the neutron-star binary 4U 1728$-$34 from the soft to hard state
• NuSTAR and Swift observations of the black hole candidate XTE J1908+094 during its 2013 outburst
• Simultaneous detection of an intrinsic absorber and a compact jet emission in the X-ray binary IGR J17091-3624 during a hard accretion state

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• Relativistic X-ray Reflection Models for Accreting Neutron Stars
• NuSTAR monitoring of MAXI J1348-630: evidence of high density disc reflection
• The current state of disk wind observations in BHLMXBs through X-ray absorption lines in the iron band
• Insight-HXMT Study of the Inner Accretion Disk in the Black Hole Candidate EXO 1846--031
• Constraining the Konoplya-Rezzolla-Zhidenko deformation parameters II: limits from stellar-mass black hole X-ray data
• Radio observations of the Black Hole X-ray Binary EXO 1846-031 re-awakening from a 34-year slumber
• Do current X-ray observations capture most of the black-hole accretion at high redshifts?
• Accretion Flow Properties of EXO 1846-031 During its Multi-Peaked Outburst After Long Quiescence
• The bright black hole X-ray binary 4U 1543--47 during 2021 outburst: a thick accretion disk inflated by high luminosity
• The dynamical structure of the outflows driven by a large-scale magnetic field
• Revisiting the galactic X-ray binary MAXI J1631-479: Implications for high inclination and a massive black hole
• Impact of reflection Comptonization on X-ray reflection spectroscopy: the case of EXO 1846-031
• Accretion disc winds in X-ray binaries
• Dimming GRS 1915+105 observed with NICER and Insight--HXMT