Starspot activity of the red dwarf star V772 Her

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The photometric behavior of the spotted primary component of the eclipsing dwarf system V772 Her (G0V + M5V) is considered based on long-term multicolor photoelectric observations. The total photometric effect caused by starspots reaches up to 0.m19. Our simulations showed that the area of the spotted regions can reach up to 13% of the total surface of the star. The spots are 1800 K cooler than the unspotted photosphere and are located at low latitudes.

Негізгі сөздер

Толық мәтін

Рұқсат жабық

Авторлар туралы

I. Alekseev

Crimean Astrophysical Observatory of RAS

Хат алмасуға жауапты Автор.
Email: ilya-alekseev@mail.ru
Ресей, Crimea, Nauchny

A. Kozhevnikova

B.N. Yeltsin Ural Federal University

Email: ilya-alekseev@mail.ru
Ресей, Yekaterinburg

V. Kozhevnikov

B.N. Yeltsin Ural Federal University

Email: ilya-alekseev@mail.ru
Ресей, Yekaterinburg

Әдебиет тізімі

  1. A.H. Butten, C.L. Morbey, F.C. Fekel, J. Tomkin, Publ. Astron. Soc. Pacif. 91, 304 (1979).
  2. C.D. Scarfe, Inform. Bull. Var. Stars. 1357 (1977).
  3. V. Reglero, M.J. Fernándes-Figueroa, A. Giménes, et al., Astron. and Astrophys. Suppl. Ser. 88, 545 (1991).
  4. F.C. Fekel, Astrophys. J. 246, 879 (1981).
  5. S.A. Drake, T. Simon, J.L. Linsky, Astrophys. J. 91, 1229 (1986).
  6. M. Landini, C.M.F. Brunella, F. Paresce, R.A. Stern, Astrophys. J. 289, 709 (1985).
  7. K.G. Strassmeier, D.S. Hall, L.J. Boyd, and R.M. Genet, Astrophys. J. Suppl. Ser. 69, 141 (1989).
  8. J.R. Bruton, D.S. Hall, L.J. Boyd, et al., Astrophys. Space Sci. 155, 27 (1989).
  9. G.A. Bakos and J. Tremko, Co. Ska. 12, 65 (1984).
  10. G.A. Bakos and J. Tremko, Astrophys. Space Sci. Lib. 98, 67 (1982).
  11. L.J. Boyd, R.M. Genet, D.S. Hall, and W.T. Persinger, Inform. Bull. Var. Stars. 2747 (1985).
  12. V. Piirola, Observ. Astrophys. Lab. Univ. Helsinki. Rep. 6, 151 (1984).
  13. V.P. Kozhevnikov, P.E. Zakharova, Astron. Soc. Pacif. Conf. Ser. 219, 381 (2000).
  14. R.F. Stern and A. Skumanich, Astrophys. J. 267, 232 (1983).
  15. И.Ю. Алексеев, Изв. Крымск. астрофиз. обсерв. 104, 272 (2008).
  16. И.Ю. Алексеев, Астрофизика 57, 275 (2014).
  17. А.В. Кожевникова, И.Ю. Алексеев, Астрон. журн. 92, 818 (2015).
  18. И.Ю. Алексеев, А.В. Кожевникова, Астрон. журн. 94, 240 (2017).
  19. И.Ю. Алексеев, А.В. Кожевникова, Астрон. журн. 95, 421 (2018).
  20. А.В. Кожевникова, И.Ю. Алексеев, В.П. Кожевников, Астрон. журн. 100, 811 (2023).
  21. I.Yu. Alekseev, Solar Phys. 224, 187 (2004).
  22. И.Ю. Алексеев, А.В. Кожевникова, Изв. Крым. Астрофиз. Обсерв. 118 (3), 27 (2022).

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Light curves and color indices of V772 Her. a: 2012, UrFU. b: 2012, KrAO. c: 2014, KrAO. d: 2016, KrAO.

Жүктеу (649KB)
Метадеректер
3. Fig. 2. Light curves of V772 Her according to KWS data. The dots with bars are the average nightly brightness values ​​in the V band, the red lines are the approximation of the seasonal light curves by the first two Fourier harmonics.

Жүктеу (327KB)
Метадеректер
4. Fig. 3. Two-color diagrams: UrFU — green circles, KrAO 2012 — red, KrAO 2014 — dark red, KrAO 2016 — pink. Blue stars — the position of the star in its brightest state of brightness.

Жүктеу (222KB)
Метадеректер
5. Fig. 4. Summary light curve of V772 Her in the V filter (black vertical lines — literature data, green — UrFU, red — KrAO, blue — KWS); time course of the total area and average latitude of spots; changes in the position of active longitudes (black circles — main, open — secondary).

Жүктеу (146KB)
Метадеректер

© The Russian Academy of Sciences, 2024