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arXiv · 2212.00558

Surface activity of the G dwarf primary in the quaternary star system V815 Her

Zsolt Kővári·Klaus G. Strassmeier·Tamás Borkovits·Levente Kriskovics·Katalin Oláh·Bálint Seli·Krisztián Vida
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Abstract

We investigate the magnetic activity of the G dwarf primary star in the multiple system V815 Herculis. Recently, TESS Sector 26 data have revealed that V815 Her is in fact a four-star system consisting of two close binaries in a long-period orbit. We give preliminary orbital solution for the long-known but unseen "third body" V815 Her `B', which is itself a close eclipsing binary of two M dwarfs. Long-term spot activity of the G dwarf is presented along with the very first Doppler image reconstructions of its spotted surface.

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Zsolt Kővári, Klaus G. Strassmeier, Tamás Borkovits, Levente Kriskovics, Katalin Oláh, Bálint Seli, Krisztián Vida. 2022-12-01. Surface activity of the G dwarf primary in the quaternary star system V815 Her. https://doi.org/10.5281/zenodo.7428650

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