Absolute parameters and apsidal rotation of the eclipsing system V501 Mon
- Authors: Volkova A.S.1,2, Volkov I.M.1,2
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Affiliations:
- Lomonosov Moscow State University
- Sternberg Astronomical Institute, Moscow, Russia
- Issue: Vol 102, No 8 (2025)
- Pages: 683-706
- Section: Articles
- URL: https://bakhtiniada.ru/0004-6299/article/view/308547
- DOI: https://doi.org/10.31857/S0004629925080042
- EDN: https://elibrary.ru/qikszt
- ID: 308547
Cite item
Abstract
Our photoelectric measurements over the past 30 years and a new solution of the radial velocity curve of the eclipsing star with an elliptical orbit V501 Mon (A8 + F2) allowed us to determine with high accuracy all the main parameters of the system: T1 = 7380 ± 60 K, M1 = 1.66 ± 0.03 M☉, R1 = 1.90 ± 0.02 R☉, T2 = 6920 ± 30 K, M2 = 1.47 ± 0.02 M☉, R2 = 1.58 ± 0.01 R☉. The photometric parallax determined in the study coincides with the Gaia value π = 0.00103″ within the error limits. For the first time, the apsidal rotation velocity ω̇_obs = 0.022°/year was accurately measured, which, within the error limits, matches the theoretical value: ω̇_theor = 0.024°/year, 70 % of this value being a relativistic contribution. The system possibly satisfies the condition of synchronism between rotational and orbital angular momenta. The age of the stars was determined to be 0.95 billion years. The main component is probably a pulsating variable star of the δ Scuti type (DSCT).
About the authors
A. S. Volkova
Lomonosov Moscow State University; Sternberg Astronomical Institute, Moscow, Russia
Author for correspondence.
Email: kravts@yandex.ru
Moscow, Russia
I. M. Volkov
Lomonosov Moscow State University; Sternberg Astronomical Institute, Moscow, Russia
Email: hwp@yandex.ru
Moscow, Russia
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