Abstract
An analysis of photometric observations for the starHD166181 (V815Her) is presented.B and V light curves were used to reconstruct temperature inhomogeneities on the stellar surface. The spots on the surface of V815 Her are concentrated at two preferred longitudes separated by 0.5 in phase (180° in longitude). The positions of more and less active regions quasi-periodically “flip-flop,” on time scales of about 600, 950, and 1250 days. The times of active-longitude switches coincide with the maxima and minima of the light curve and the amplitude of the brightness variations, as well as with the minima and maxima of the star’s spottedness.
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References
J. F. Heard, Publ. David Dunlap Observ. 2, 107 (1956).
R. Nadal, A. Pedoussaut, N. Ginesten, et al., Astron. Astrophys. 37, 191 (1974).
M. J. Fernandes-Figueroa, B. Montesinos, E. de Castro, et al., Astron. Astrophys. 169, 219 (1986).
F. C. Fekel, T. J. Moffet, and G.W. Henry, Astrophys. J. Suppl. Ser. 60, 551 (1986).
R. C. Dempsey, J. E. Neff, D. O’Neil, et al., Astron. J. 111, 1356 (1996).
O. J. Eggen, Intern. Bull. Var. Stars 1426, 1 (1978).
M. V. Mekkadan, A. V. Raveendran, and S. Mohin, Intern. Bull. Var. Stars 1791, 1 (1980).
K. G. Strassmeier, D. S. Hall, L. J. Boyd, et al., Astrophys. J. Suppl Ser. 69, 141 (1989).
L. Jetsu, T. Hackman, D. S. Hall, et al., Astron. Astrophys. 362, 223 (2000).
F. C. Fekel,D. J. Barlow, S. D. Scarfe, et al., Astron. J. 129, 1001 (2005).
I. S. Savanov and K. G. Strassmeier, Astron. Nachr. 329, 364 (2008).
K. G. Strassmeier, R. Briguglio, T. Granzer, et al., Astron. Astrophys. 490, 287 (2008).
V. Y. Terebizh, Astron. Astrophys. Trans. 23, 85 (2004).
S.V. Berdyugina, Living Revs Solar Phys. 2, 8 (2005).
S. P. Jarvinen, S. V. Berdyugina, and K. G. Strassmeier, Astron. Astrophys. 440, 735 (2005).
S. V. Berdyugina and S. P. Jarvinen, Astron. Nachr. 326, 283 (2005).
M. Breger, Comm. Asteroseism. 6, 1 (1990).
E. Isik, M. Schlussler, and S. K. Solanki, Astron. Astrophys. 464, 1049 (2007).
D. Elstner and H. Korhonen, Astron. Nach. 326, 278 (2005).
S. V. Berdyugina, D. Moss, D. Sokoloff, et al.,Astron. Astrophys. 445, 703 (2006).
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Original Russian Text © I.S. Savanov, 2009, published in Astronomicheskiĭ Zhurnal, 2009, Vol. 86, No. 10, pp. 1014–1022.