APSIDAL MOTION AND PHYSICAL PARAMETERS OF V361 CAM

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Abstract

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.

About the authors

I. M. Volkov

Lomonosov Moscow State University, Sternberg Astronomical Institute

Email: hwp@yandex.ru
Moscow, Russia

S. A. Naroenkov

Institute of Astronomy of the Russian Academy of Sciences

Email: snaroenkov@inasan.ru
Moscow, Russia

A. S. Volkova

Lomonosov Moscow State University, Sternberg Astronomical Institute

Moscow, Russia

References

  1. S.A. Otero, P. Wils, G. Hoogeveen, and P.A. Dubovsky, Inform. Bull. Var. Stars, № 5681 (2006).
  2. P.R. Woźniak, W.T. Vestrand, C.W. Akerlof, R. Balsano, et al., Astron. J. 127(4), 2436 (2004).
  3. И.М. Волков, Н.С. Волкова, Астрон. журн. 86(2), 158 (2009).
  4. I.M. Volkov, Peremennye Zvezdy 44, 42 (2024).
  5. E.V. Kazarovets, N.N. Samus’, O.V. Durlevich, N.N. Kireeva, and E.N. Pastukhova, Inform. Bull. Var. Stars № 5969, 1 (2011).
  6. I. Bulut and O. Demircan, Monthly Not. Roy. Astron. Soc. 378(1), 179 (2007).
  7. Н.Н. Самусь, Е.В. Казаровец, О.В. Дурлевич, Н.Н. Киреева, Е.Н. Пастухова, Астрон. журн. 94(1), 87 (2017).
  8. C.H. Kim, J.M. Kreiner, B.Zakrzewski, W. Ogłoza, H.-W. Kim, and M.-J. Jeong, Astrophys. J. Suppl. 235(2), id. 41 (2018).
  9. N. Katysheva, S. Shugarov, D. Chochol, E. Pavlenko, et al., Central European Astrophys. Bull. 37, 335 (2013).
  10. V. Straižys, Multicolor stellar photometry (Tucson: Pachart Pub. House, 1992).
  11. J.C. Mermilliod, M. Mermilliod, and B. Hauck, Astron. and Astrophys. Suppl. Ser. 124, 349 (1997).
  12. K.G. Stassun, R.J. Oelkers, M. Paegert, G. Torres, et al., Astron. J. 158(4), id. 138 (2019).
  13. И.М. Волков, Н.С. Волкова, Д. Хохол, Астрон. журн. 87(5), 462 (2010).
  14. И.М. Волков, Н.С. Волкова, И.В. Николенко, Д. Хохол, Астрон. журн. 88(9), 894 (2011).
  15. И.М. Волков, Д. Хохол, А.С. Кравцова, Астрон. журн. 94(5), 436 (2017).
  16. И.М. Волков, А.С. Кравцова, Астрон. журн. 97(3), 190 (2020).
  17. M.A. Burlak, I.M. Volkov, and N.P. Ikonnikova, Contrib. Astron. Observ. Skalnate Pleso 48(4), 536 (2018).
  18. V.G. Kornilov, I.M. Volkov, A.I. Zakharov, L.N. Kozyreva, L.N. Kornilova, et al., Trudy Gosud. Astron. Inst. Sternberga 63, 4 (1991).
  19. T.J. Moffett and T.G. Barnes, III, Astron. J. 84, 627 (1979).
  20. А.С. Кравцова, И.М. Волков, Д. Хохол, Астрон. журн. 96(6), 508 (2019).
  21. И.М. Волков, А.С. Кравцова, Астрон. журн. 99(6), 470 (2022).
  22. E.E. Mendoza, Boletin de los Observatorios Tonantzintla y Tacubaya 4, 149 (1967).
  23. O.J. Eggen and A.R. Sandage, Astrophys. J. 140(6), 130 (1964).
  24. B.J. Taylor, Astrophys. J. Suppl. 60, 577 (1986).
  25. G.M. Green, E.F. Schlafly, D.P. Finkbeiner, H.-W. Rix, et al., Astrophys. J. 810, id. 25 (2015).
  26. I.M. Volkov, L.A. Bagaev, and D. Chochol, in the ESO Workshop on the Impact of Binaries on Stellar Evolution, edited by G. Beccari and H.M.J. Boffin, ESO Garching, July 3–7, 2017 (Cambridge: Cambridge Univ. Press, 2017).
  27. I.M. Volkov, L.A. Bagaev, A.S. Kravtsova, and D. Chochol, Contrib. Astron. Observ. Skalnate Pleso 49(2), 434 (2019).
  28. I.M. Volkov and Kh.F. Khaliullin, Astron. Rep. 46(9), 747 (2002).
  29. I.M. Volkov, L.A. Bagaev, and D. Chochol, in Living Together: Planets, Host Stars and Binaries, edited by S.M. Rucinski, G. Torres, and M. Zejda, Astron. Soc. Pacific Conf. Ser. 496, 266 (2015).
  30. P.J. Flower, Astrophys. J. 469, 355 (1996).
  31. D.M. Popper, Ann. Rev. Astron. Astrophys. 18, 115 (1980).
  32. I.M. Volkov and A.S. Kravtsova, Astron. J. 164(5), id. 194 (2022).
  33. P. De Cat, in: IAU Colloq. 185 Radial and Nonradial Pulsationsn as Probes of Stellar Physics, edited by C. Aerts, T.R. Bedding, and J. ChristensenDalsgaard, Astron. Soc. Pacific Conf. Ser. 259, 196 (2002).
  34. И.М. Волков, Астрон. журн. 100(4), 319 (2023).
  35. И.М. Волков, С.А. Нароенков, А.С. Кравцова, Астрон. журн. 101(5), 436 (2024).
  36. И.М. Волков, А.С. Волкова, Л.А. Багаев, Астрон. журн. 101(9), 819 (2024).
  37. А.И. Халиуллина, Х.Ф. Халиуллин, Астрон. журн. 61, 393 (1984).
  38. R.A. Wade and S.M. Rucinski, Astron. and Astrophys. Suppl. Ser. 60, 471 (1985).
  39. I.M. Volkov, Peremennye Zvezdy 42, 1 (2022).
  40. Kh.F. Khaliullin, Astrophys. J. 299, 668 (1985).
  41. I.M. Volkov, D. Chochol, J. Grygar, M. Mašek, and J. Juryšek, Contrib. Astron. Observ. Skalnate Pleso 47(1), 29 (2017).
  42. L. Girardi, A. Bressan, G. Bertelli, and C. Chiosi, Astron. and Astrophys. Suppl. Ser. 141, 371 (2000).
  43. Х.Ф. Халиуллин, А.И. Халиуллина, Астрон. журн. 66, 76 (1989).
  44. A. Claret, Astron. and Astrophys. 424, 919 (2004).
  45. Н.И. Шакура, Письма в Астрон. журн. 11(7–8), 536 (1985).
  46. T. Levi-Civita, American J. Mathematics 59(2), 225 (1937).
  47. I.M. Volkov, Astrophys. Space Sci. 296(1–4), 105 (2005).
  48. I.M. Volkov, Contrib. Astron. Observ. Skalnate Pleso 50(2), 635 (2020).
  49. I.M. Volkov, Inform. Bull. Var. Stars, № 3876, 1 (1993).
  50. S. Albrecht, S. Reffert, I.A.G. Snellen, and J.N. Winn, Nature 461, 373 (2009).

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