Open AccessLight-curve modelling in a Roche plus stellar wind model: the massive binary WR22
Author(s) -
E. Antokhina,
I. I. Antokhin,
Guillaume Lenoir-Craig,
Nicole StLouis,
A. F. J. Moffat
Publication year - 2022
Publication title -
astronomy at the epoch of multimessenger studies. proceedings of the vak-2021 conference, aug 23–28, 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.51194/vak2021.2022.1.1.034
Subject(s) - light curve , physics , binary number , stars , binary star , astrophysics , star (game theory) , binary system , mass ratio , code (set theory) , o type star , computer science , mathematics , arithmetic , set (abstract data type) , programming language
A code for the synthesis of light curves of close binaries in the Roche model is proposed which incorporates a stellarwind around one of the stars. The code makes it possible to analyze observations of binary systems containing Wolf-Rayetstars. This paper presents the results of the application of this code to the spectroscopic binary WR22, whose componentsare stars of spectral types WN7h and O9III-V (P = 80.336 d , e ∼ 0.6). The light curves were obtained with one of theBRITE-Constellation space-based telescopes. Two solutions to the problem were found, corresponding to two possibleluminosity classes of the O star, O9III and O9V. For each solution, the orbital inclination, the masses of the components,the temperature of the WR star, the WR mass-loss rate, and other parameters were determined. The resulting stellarparameters favour the solution for the WN7h+O9V model