PECULIARITIES OF LONG-TERM SPOT ACTIVITY OF SOME LATE SPECTRAL-TYPE STARS

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

We present an analysis of long-term photometric observations of several dozen chromospherically active stars with solar-type activity (both from our own observations and from data available in the literature). The distribution of cold photospheric spots has been modeled based on a zonal model – several hundred models have been obtained. It has been found that the majority of stars have spots located at middle and moderate latitudes, the maximum spot areas can occupy from 7 to 58% of the star’s surface. It is shown that for some stars we can suspect the drift of spots in latitude, both towards the equator and towards the pole. However, the speed of such a drift is several times lower than that of sunspots. The presence of stellar activity cycles in 15 stars was revealed: cycles last from 3 to 28 years and expressed in changes in the brightness of the system, as well as in changes in the total spottedness of the star. The paper is based on a talk presented at the astrophysical memorial seminar “Novelties in Understanding the Evolution of Binary Stars”, dedicated to the 90th anniversary of Professor M.A. Svechnikov.

About the authors

A. V. Kozhevnikova

Ural Federal University named after the first President of Russia B.N. Yeltsin

Author for correspondence.
Email: alla.kozhevnikova@urfu.ru
Russia, Yekaterinburg

I. Yu. Alekseev

Research Institute “Crimean Astrophysical Observatory”

Email: alla.kozhevnikova@urfu.ru
Russia, Nauchny

V. P. Kozhevnikov

Ural Federal University named after the first President of Russia B.N. Yeltsin

Email: alla.kozhevnikova@urfu.ru
Russia, Yekaterinburg

References

  1. A. S. Brun and M. K. Browning, Liv. Rev. in Sol. Phys. 14, 133 (2017).
  2. M. M. Katsova, L. L. Kitchatinov, D. Moss, K. Oláh, and D. D. Sokoloff, Astron. Rep. 62, 513 (2018).
  3. V. N. Obridko, M. M. Katsova, and D. D. Sokoloff, Monthly Not. Roy. Astron. Soc. 516, 1251 (2022).
  4. K. G. Strassmeier, Astron. and Astrophys. Rev. 17, 308 (2009).
  5. S. V. Berdyugina, Liv. Rev. in Solar Phys. 2, 1 (2005).
  6. Р. Е. Гершберг, Активность солнечного типа звезд главной последовательности (Одесса: АстроПринт, 2002).
  7. А. В. Кожевникова, В. П. Кожевников, И. Ю. Алексеев, И. А. Юшков, А. А. Дорогов, Астрон. журн. 89, 318 (2012).
  8. А. В. Кожевникова, И. Ю. Алексеев, Астрон. журн. 92, 818 (2015).
  9. I. Yu. Alekseev and A. V. Kozhevnikova, Astron. Rep. 62, 396 (2018).
  10. M. Zeilik, S. Gordon, E. Juderlund, et al., Astrophys. J. 421, 303 (1994).
  11. S. A. Naftilan and E. F. Milone, Astron. J. 84, 1218 (1979).
  12. C. Lazaro and M. J. Arevalo, Astron. J. 113, 2283 (1997).
  13. M. Afsar, P. A. Heckert, and C. Ibanoglu, Astron. and Astrophys. 420, 595 (2004).
  14. S. Messina and E. F. Guinan, Astron. and Astrophys. 393, 225 (2002).
  15. S. Messina and E. F. Guinan, Astron. and Astrophys. 409, 1017 (2003).
  16. S. P. Jarvinen, S. V. Berdyugina, and K. G. Strassmeier, Astron. and Astrophys. 440, 735 (2005).
  17. K. G. Strassmeier and J. B. Rice, Astron. and Astrophys. 330, 685 (1998).
  18. J. D. Dorren, M. Güdel, and E. F. Guinan, Astrophys. J. 448, 431 (1995).
  19. G. Cutispoto, S. Messina, and M. Rodonó, Astron. and Astrophys. 400, 659 (2003).
  20. A. Udalski and E. H. Geyer, Inform. Bull. Var. Stars. 2525 (1984).
  21. A. Udalski and E. H. Geyer, Inform. Bull. Var. Stars. 2691 (1985).
  22. G. Cutispoto, Astron. and Astrophys. Suppl. Ser. 131, 321 (1998).
  23. S. V. Berdyugina, J. Pelt, and I. Tuominen, Astron. and Astrophys. 394, 505 (2002).
  24. S. L. Baliunas, R. A. Donahue, W. H. Soon, et al., Astrophys. J. 438, 269 (1995).
  25. S. Messina, E. F. Guinan, A. F. Lanza, and C. Ambruster, Astron. and Astrophys. 347, 249 (1999).
  26. G. W. Lockwood, B. A. Skiff, G. W. Henry, S. M. Henry, R. R. Radick, et al., Astrophys. J. Suppl. Ser. 171, 260 (2007).
  27. T. Lloyd-Evans and M. C. J. Koen, South. Afr. Astron. Obs. Circ. 11, 21 (1987).
  28. G. Cutispoto, S. Messina, M. Rodonó, Astron. and Astrophys. 367, 810 (2001).
  29. И. Ю. Алексеев, Изв. Крым. Астрофиз. Обс. 104, 272 (2008).
  30. И. Ю. Алексеев, Р. Е. Гершберг, Астрон. журн. 73, 589 (1996).
  31. K. Olah, Astrophys. and Space Science 304, 1–4, 145 (2006).
  32. И. Ю. Алексеев, Запятненные звезды малых масс (Одесса: АстроПринт, 2001).
  33. D. P. Kjurkchieva, D. V. Marchev, and W. Ogloza, Astron. and Astrophys. 400, 623 (2003).
  34. D. P. Kjurkchieva, D. V. Marchev, P. A. Heckert, and C. A. Shower, Astron. and Astrophys. 424, 993 (2004).
  35. M. Zeilik, M. Ledlow, M. Rhodes, et al., Astrophys. J. 354, 352 (1990).
  36. D. Kjurkchieva, D. Marchev, and W. Ogloza, Astron. and Astrophys. 415, 231 (2004).
  37. E. Budding and M. Zeilik, Astrophys. J. 319, 827 (1987).
  38. P. Vivekananda Rao, M. B. R. Sarma, and B. V. N. S. Praksa Rao, J. Astrophys. Astron. 12, 225 (1991).
  39. I. Yu. Alekseev and O. V. Kozlova, Astron. and Astrophys. 396, 203 (2003).
  40. S. V. Berdyugina, A. V. Berdyugin, I. V. Ilyin, and I. Tuominen, Astron. and Astrophys. 360, 272 (2000).
  41. S. V. Berdyugina, I. V. Berdyugin, I. V. Ilyin, and I. Tuominen, Astron. and Astrophys. 350, 626 (1999).
  42. S. S. Vogt, A. Hatzes, A. Misch, and M. Kürster, Astrophys. J. Supp. 121, 547 (1999).
  43. K. G. Strassmeier, J. B. Rice, W. Wehlau, et al., Astron. and Astrophys. 268, 671 (1993).
  44. М. А. Лившиц, И. Ю. Алексеев, М. М. Кацова, Астрон. журн. 80, 613 (2003).
  45. M. M. Katsova, M. A. Livshits, and G. Belvedere, Solar Phys. 216, 353 (2003).
  46. S. V. Berdyugina and I. Tuominen, Astron. and Astrophys. 336, 25 (1998).
  47. Е. А. Бруевич, М. М. Кацова, Д. Д. Соколов, Астрон. журн. 78, 827 (2001).
  48. D. S. Hall, Astrophys. J. 380, L85 (1991).
  49. K. Oláh, Z. Kolláth, and K. G. Strassmeier, Astron. and Astrophys. 356, 643 (2000).

Supplementary files

Supplementary Files
Action
1. JATS XML
Download
2.

Download (551KB)
Indexing metadata
3.

Download (266KB)
Indexing metadata
4.

Download (279KB)
Indexing metadata
5.

Download (182KB)
Indexing metadata

Copyright (c) 2023 А.В. Кожевникова, И.Ю. Алексеев, В.П. Кожевников

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies