Journal article

Publication year: 2019

Journal: International Journal of Modern Physics E

Volume number: 28

Issue number: 6

ISSN: 0218-3013

eISSN: 1793-6608

Open access status: Green

DOI Link: https://doi.org/10.1142/S0218301319500447

Publisher: World Scientific Publishing

Abstract: 
The evolution of contact binary star systems in mass asymmetry (transfer) coordinate is considered. The orbital period changes are explained by an evolution in mass asymmetry towards the symmetry (symmetrization of binary system). It is predicted that decreasing and increasing orbital periods are related, respectively, with the nonoverlapping and overlapping stage of the binary star during its symmetrization. A huge amount of energy Delta U approximate to 10(41) J is converted from the potential energy into internal energy of the stars during the symmetrization. As shown, the merger of stars in the binary systems, including KIC 9832227, is energetically an unfavorable process. The sensitivity of the calculated results to the values of total mass and orbital angular momentum is analyzed.

Harvard Citation style: Sargsyan, V., Lenske, H., Adamian, G. and Antonenko, N. (2019) Origin of the orbital period change in contact binary stars, International Journal of Modern Physics E, 28(6), Article 1950044. https://doi.org/10.1142/S0218301319500447

APA Citation style: Sargsyan, V., Lenske, H., Adamian, G., & Antonenko, N. (2019). Origin of the orbital period change in contact binary stars. International Journal of Modern Physics E. 28(6), Article 1950044. https://doi.org/10.1142/S0218301319500447