The Directly Imaged Exoplanet Host Star 51 Eridani is a Gamma Doradus Pulsator

  title={The Directly Imaged Exoplanet Host Star 51 Eridani is a Gamma Doradus Pulsator},
  author={Aldo G. Sepulveda and Daniel Huber and Zhoujian Zhang and Gang Li and Michael C. Liu and Timothy R. Bedding},
  journal={The Astrophysical Journal},
51 Eri is well known for hosting a directly imaged giant planet and for its membership to the β Pictoris moving group. Using 2 minute cadence photometry from the Transiting Exoplanet Survey Satellite (TESS), we detect multiperiodic variability in 51 Eri that is consistent with pulsations of Gamma Doradus (γ Dor) stars. We identify the most significant pulsation modes (with frequencies between ∼0.5 and 3.9 cycles day−1 and amplitudes ranging between ∼1 and 2 mmag) as dipole and quadrupole… 
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