The 21st Cambridge workshop on Cool Stars, Stellar Systems, and the Sun
Published December 12, 2022 | Version v1
Conference paper Open

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

Creators

  • 1. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
  • 2. Leibniz-Institute for Astrophysics, Potsdam, Germany
  • 3. Baja Astronomical Observatory of University of Szeged, Baja, Hungary

Contributors

Description

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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Conference paper: arXiv:2212.00558 (arXiv)

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