Year: 2024
Type: article
Abstract: New high-precision photometric measurements of the V957 Cep system (P = 1.99d, V = 11.17m, e = 0.127, B6 V+B8 V), as well as an integrated approach to orbital parameters determining based both on photometric solutions of the light curves and on the study of the course of residual deviations of the minima timings from the linear formula O – C made it possible for the first time to accurately measure the apsidal motion rate: ω˙obs= 2.91°/year, which coincided with the theoretical value under the condition of the orbital and axial rotations synchronism:ω˙theor = 2.92°/year. The physical parameters of the component stars were obtained: T1 = 14550 ± 300 K, M1 = 4.0 ± 0.2 M•, R1 = 2.55 ± 0.05 R•, T2 = 12400 ± 250 K, M2 = 3.0 ± 0.15 M•, R2 = 1.88 ± 0.05 R•. This set of parameters corresponds to stars of zero age, recently descended to ZAMS. The secondary component is a pulsating variable star of the β Cephei type.
Source: Astronomicheskii Zhurnal
Authors: I. M. Volkov, S. A. Naroenkov, A. S. Kravtsova
Institutions: Lomonosov Moscow State University, Institute of Astronomy
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405333140