The effect of thermal winds on the outbursts evolution of LMXB systems

Abstract

Theoretical models of accretion discs and observational data indicate that the X-ray emission from the inner parts of an accretion disc can irradiate its outer regions and induce a thermal wind, which carries away the mass and angular momentum from the disc. Our aim is to investigate the influence of the thermal wind on the outburst light curves of black hole X-ray binary systems. We carry out numerical simulations of a non-stationary disc accretion with wind using upgraded open code freddi. We assume that the wind launches only from the ionised part of the disc and may turn off if the latter shrinks fast enough. Our estimates of the viscosity parameter $\alpha$ are shifted downward compared to a scenario without a wind. Generally, correction of $\alpha$ depends on the spectral hardness of central X-rays and the disc outer radius, but unlikely to exceed a factor of 10 in the case of a black hole low-mass X-ray binary (BH LMXB). We fit 2002 outburst of BH LMXB 4U 1543-47 taking into account the thermal wind. The mass loss in the thermal wind is of order of the accretion rate on the central object at the peak of the outburst. New estimate of the viscosity parameter $\alpha$ for the accretion disc in this system is about two times lower than the previous one. Additionally, we calculate evolution of the number of hydrogen atoms towards 4U 1543-47 due to the thermal wind from the hot disc.

19 pages, 22 figures, accepted for publication in MNRAS

References in corpus (23)

• Strong disc winds traced throughout outbursts in black-hole X-ray binaries
• Stability of helium accretion discs in ultracompact binaries
• Convection Causes Enhanced Magnetic Turbulence in Accretion Disks in Outburst
• A catalogue of high-mass X-ray binaries in the Galaxy: from the INTEGRAL to the Gaia era
• Hard-state accretion disk winds from black holes: the revealing case of MAXI J1820+070
• XRBcats: Galactic Low Mass X-ray Binary Catalogue
• The viscosity parameter alpha and the properties of accretion disc outbursts in close binaries
• Coronae and Winds from Irradiated Disks in X-ray binaries
• Thermal Disk Winds in X-ray Binaries: Realistic Heating and Cooling Rates Give Rise to Slow, but Massive Outflows
• Modeling of non-stationary accretion disks in X-ray novae A 0620-00 and GRS 1124-68 during outburst
• Accretion and Outflow in V404 Cyg
• The luminosity dependence of thermally-driven disc winds in low-mass X-ray binaries
• The spin of the black hole 4U 1543-47
• The impact of thermal winds on the outburst lightcurves of black hole X-ray binaries
• Thermally-Driven Disc Winds as a Mechanism for X-ray Irradiation Heating in Black Hole X-ray Binaries: The Case Study of GX339-4
• Evolution of finite viscous disks with time-independent viscosity
• An ionised accretion disc wind in Hercules X-1
• Thermally driven winds in ULXs
• Physical modeling of viscous disc evolution around magnetized neutron star. Aql X-1 2013 outburst decay
• Non-Steady State Accretion Disks in X-Ray Novae: Outburst Models for Nova Monocerotis 1975 and Nova Muscae 1991
• Change in the orbital period of a binary system due to an outburst in a windy accretion disc
• Magnetic support, wind-driven accretion, coronal heating, and fast outflows in a thin magnetically arrested disc
• Analysis of accretion disc structure and stability using open code for vertical structure