Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743-322

Abstract

High inclination black hole X-ray binaries exhibit blueshifted ionized absorption lines from disk winds, whose launching mechanism is still in debate. The lines are predominantly observed in the high/soft state and disappear in the low/hard state, anti-correlated with the jet. We have tested if the thermal winds, which are driven by the irradiation of the outer disk by the X-rays from the inner disk, can explain these observed properties or whether we need a magnetic switch between jet and wind. We use analytic thermal-radiative wind models to predict the column density, ionisation parameter and velocity of the wind given the broadband continuum shape and luminosity determined from RXTE monitoring. We use these to simulate the detailed photo-ionised absorption features predicted at epochs where there are Chandra high resolution spectra. These include low/hard, high/soft and very high states. The model was found to well reproduce the observed lines in the high/soft state, and also successfully predicts their disappearance in the low/hard state. However, the simplest version of the thermal wind model also predicts that there should be strong features observed in the very high state, which are not seen in the data. Nonetheless, we show this is consistent with thermal winds when we include self-shielding by the irradiated inner disk atmosphere. These results indicate that the evolution of observed wind properties in different states during outbursts in H 1743-322 can be explained by the thermal wind model and does not require magnetic driving.

14 pages, 8 figures, Accepted for publication in ApJ

References in corpus (8)

• The magnetic nature of disk accretion onto black holes
• The Accretion Disk Wind in the Black Hole GRO J1655-40
• Thermal Winds in Stellar Mass Black Hole and Neutron Star Binary Systems
• Reverberation Reveals the Truncated Disc in the Hard State of GX 339-4
• XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
• The Disk Wind in the Neutron Star Low-mass X-Ray Binary GX 13+1
• Spectral and Timing Properties of the Black Hole X-ray Binary H 1743-322 in the Low/hard State Studied with Suzaku
• Magnetothermal disk winds in X-ray binaries: poloidal magnetic fields suppress thermal winds

Cited by in corpus (8)

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• X-ray polarisation properties of thermal-radiative disc winds in binary systems
• Modeling Magnetic Disk-Wind State Transitions in Black Hole X-ray Binaries
• Stratified wind from a super-Eddington X-ray binary is slower than expected
• The disk wind in GRS 1915+105 as seen by Insight-HXMT
• Variable ionized disk wind in MAXI J1803-298 revealed by NICER
• Evidence of mutually exclusive outflow forms from a black hole X-ray binary
• Accretion disc winds in X-ray binaries