Modeling of non-stationary accretion disks in X-ray novae A 0620-00 and GRS 1124-68 during outburst

Abstract

We address the task of modeling soft X-ray and optical light curves of X-ray novae in the high/soft state. The analytic model of viscous evolution of an externally truncated accretion α-disk is used. Relativistic effects near a Kerr black hole and self-irradiation of an accretion disk are taken into account. The model is applied to the outbursts of X-ray nova Monocerotis 1975 (A 0620-00) and X-ray nova Muscae 1991 (GRS 1124-68). Comparison of observational data with the model yields constraints on the angular momentum (the Kerr parameter) of the black holes in A 0620-00 and GRS 1124-68: 0.3-0.6 and \leq 0.4, and on the viscosity parameter αof the disks: 0.7-0.95 and 0.55-0.75. We also conclude that the accretion disks should have an effective geometrical thickness 1.5-2 times greater than the theoretical value of the distance between the photometric layers.

arXiv comment12 pages, 11 figures, 1 table, accepted for publication in A&A (minor changens following the referee's comments, five references added)

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• Partial accretion in the propeller stage of low mass X-ray binary Aql X--1
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• Understanding X-ray Irradiation in Low-Mass X-ray Binaries directly from their Light-Curves
• The Spin of The Black Hole in the X-ray Binary Nova Muscae 1991
• The Spin of the Black Hole GS 1124-683: Observation of a Retrograde Accretion Disk?
• 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
• Determination of the turbulent parameter in the accretion disks: effects of self-irradiation in 4U 1543-47 during the 2002 outburst
• On properties of Velikhov-Chandrasekhar MRI in ideal and non-ideal plasma
• Constraints on the Viscosity and Magnetic Field in Hot Accretion Flows around Black Holes
• Colors and patterns of black hole X-ray binary GX 339-4
• Superhump period of the black hole X-ray binary GX 339-4
• Vertical Structure of the Outer Accretion Disk in Persistent Low-Mass X-Ray Binaries
• A viscous instability in axially symmetric laminar shear flows
• Vertical Convection in Turbulent Accretion Disks and Light Curves of the A0620-00 1975 Outburst
• Physical modeling of viscous disc evolution around magnetized neutron star. Aql X-1 2013 outburst decay
• Evolution of broad-band SED during outburst rise in NS X-ray Nova Aql X-1
• Change in the orbital period of a binary system due to an outburst in a windy accretion disc
• On the Maximal Value of the Turbulent alpha-Parameter in Accretion Discs
• The effect of thermal winds on the outbursts evolution of LMXB systems
• Black Hole Spin Evolution Affected by Magnetic Field Decay
• Analysis of accretion disc structure and stability using open code for vertical structure
• Analytic construction of baroclinic tori by non-linear summation
• Morphology of the Light Curves for the X-ray Novae H1743-322 and GX339-4 during their Outbursts in 2005-2019