Starspot activity of the red dwarf star V772 Her

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Abstract

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.

About the authors

I. Yu. Alekseev

Crimean Astrophysical Observatory of RAS

Author for correspondence.
Email: ilya-alekseev@mail.ru
Russian Federation, Crimea, Nauchny

A. V. Kozhevnikova

B.N. Yeltsin Ural Federal University

Email: ilya-alekseev@mail.ru
Russian Federation, Yekaterinburg

V. P. Kozhevnikov

B.N. Yeltsin Ural Federal University

Email: ilya-alekseev@mail.ru
Russian Federation, Yekaterinburg

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