APSIDAL MOTION AND PHYSICAL PARAMETERS OF V361 CAM

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Аннотация

Our multicolour photometric measurements ofV361 Cam (P = 8.64d, V = 10.79m, e = 0.12, B5 IV+B9 V) over the past 16 years, as well as TESS data, allowed us to determine for the first time the main physical characteristics of the system and measure the apsidal rotation velocity. The following physical parameters of the component stars were obtained: T1 = 15 400 ± 300 K, M1 = 6.0 ± 0.4 MQ, R1 = 5.03 ± 0.05 Ro, T2 = 11700 ± 250 K, М2 = 2.8 ± 0.2MQ, R2 = 1.94 ± 0.04RQ. The photometric parallax of 0.00035" ± 0.000001" matches the Gaia measurement of 0.00035" ± 0.00003". The apsidal rotation velocity is wobs = 0.024 ± 0.007°/year, which is less than the theoretical value underthe synchronism condition wtheor = 0.056 ± 0.006°/year. The age of the system, assuming solar chemical composition, is 70 Myr. Both components are pulsating в Cephei variables.

Авторлар туралы

I. Volkov

Lomonosov Moscow State University, Sternberg Astronomical Institute

Email: hwp@yandex.ru
Moscow, Russia

S. Naroenkov

Institute of Astronomy of the Russian Academy of Sciences

Email: snaroenkov@inasan.ru
Moscow, Russia

A. Volkova

Lomonosov Moscow State University, Sternberg Astronomical Institute

Moscow, Russia

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