TESS Science Conference 2
Published July 23, 2021 | Version v1
Poster Open

Kepler-807 B: A Highly Eccentric Companion Near the Stellar Transition

Creators

  • 1. Michigan State University
  • 2. University of California Santa Cruz, University of California Riverside

Contributors

Description

The traditional boundary between brown dwarfs and M-dwarfs is a mass limit for sustainable hydrogen fusion (~80 MJ). Discovering and characterizing objects near this transition point offers a unique opportunity to test our substellar and stellar evolution models, while studying the nature of this transition. Using observations from Kepler combined with ground-based radial velocity measurements from Keck-HIRES and APOGEE, we confirmed and measured the mass of Kepler-807 B. This companion is on a highly eccentric (0.69) 117 day orbit, and from our analysis we measured a radius of 1.002 ± 0.048 RJ and a mass of 82.4 ± 3.6 MJ, too massive to be an exoplanet as previously characterized. This system is part of the Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey to discover and characterize long period giant planets in Kepler, K2, and TESS.

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Additional details

References

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