International Conference
The multi-messenger astronomy:
gamma-ray bursts, search for electromagnetic counterparts to
neutrino events and gravitational waves

7-14 October 2018

Influence of accretion disk wind on the evolution of LMX outburst A.L. Avakyan, K.L. Malanchev, G.V. Lipunova

Abstract

      From analysis of the light curves observed during outbursts of low-mass X-ray binaries it was found that viscosity parameter α, which characterizes the mass transport in the accretion disk within the framework of the Shakura-Sunyaev model, lies in the range of 0.2-1. However, simulations of the magnetorotational instability give values of α an order of magnitude smaller. In this work, we consider an additional source of matter transfer, namely, the wind from the disk surface. We calculate evolution of the disk taking into account the Compton-heated wind, which can decrease the value of α parameter derived from observations. As a result, we obtain the dependence of α on wind parameters. We show that the presence of wind can strongly affect the inferred value of α, as well as the entire evolution of the disk.

Reference:
A.L. Avakyan*, K.L. Malanchev, G.V. Lipunova. "Influence of accretion disk wind on the evolution of LMX outburst", in Proceedings of the International Conference "The multi-messenger astronomy: gamma-ray bursts, search for electromagnetic counterparts to neutrino events and gravitational waves", Russia, Nizhnij Arkhyz (SAO RAS), Terskol (BNO INR RAS), October, 7 - 14, 2018, Publishing house SNEG, Pyatigorsk, 2019, ISBN 978-5-6041711-1-0, pp. 25-31.
DOI: 10.26119/SAO.2019.1.35452
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