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Determination of the Close Binary Systems Parameters by Synthesis Methods: from White Dwarfs to Wolf–Rayet Stars and Black Holes

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Abstract

Synthesis methods for light and radial velocity curves are currently one of the main tools for studying close binary systems (CBSs). The paper gives a brief review of the history and development of the methods and their implementations in Sternberg Astronomical Institute of Moscow State University (SAI MSU), where a set of computer programs has been created to analyze observations of CBSs of various types. As a demonstration, we present the results of the analysis by our algorithms for three interesting CBSs at different evolutionary stages. An analysis of the unusual light curves of the recently discovered pre-cataclysmic binary GPX-TF16E-48 was performed using the Roche model with spots on the normal star. The X-ray light curves of the microquasar SS433 were analyzed using a precessing accretion disk model. The highly elliptical Wolf‒Rayet binary WR22 was studied in the frame of the Roche model accounting for the absorption by the powerful wind of the Wolf–Rayet star using space-based photometric observations. As a result of this detailed analysis of the light curves and involving spectroscopic information, the parameters of the CBSs and their components were found. This paper is based on a presentation made in the astrophysical memorial seminar “Novelties in Understanding the Evolution of Binary Stars”, dedicated to the 90th anniversary of Professor M.A. Svechnikov.

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Funding

The work of E.A.A. was supported by the Interdisciplinary Scientific and Educational School of M.V. Lomonosov Moscow State University “Fundamental and applied space research.” The work of I.I.A. was supported by the Russian Scientific Foundation (project 23-12-00092, analysis of light curves, development of a technique for accounting for stellar wind in a binary system).

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  1. Lomonosov Moscow State University, Sternberg Astronomical Institute, 119991, Moscow, Russia

    E. A. Antokhina & I. I. Antokhin

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  1. E. A. Antokhina
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  2. I. I. Antokhin
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Correspondence to E. A. Antokhina or I. I. Antokhin.

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Translated by E. Seifina

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Antokhina, E.A., Antokhin, I.I. Determination of the Close Binary Systems Parameters by Synthesis Methods: from White Dwarfs to Wolf–Rayet Stars and Black Holes. Astron. Rep. 67, 876–887 (2023). https://doi.org/10.1134/S1063772923090019

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