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.
@article{arxiv.2212.00558,
title = {Surface activity of the G dwarf primary in the quaternary star system V815 Her},
author = {Zsolt Kővári and Klaus G. Strassmeier and Tamás Borkovits and Levente Kriskovics and Katalin Oláh and Bálint Seli and Krisztián Vida},
journal= {arXiv preprint arXiv:2212.00558},
year = {2023}
}
Comments
3 pages, poster paper presented at the 21th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (Toulouse, France) in 2022