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

TKS XI: Characterising 4 sub-Neptunes orbiting K dwarf TOI 1246

Creators

  • 1. University of California, Berkeley
  • 2. University of Notre Dame
  • 3. Instituto de Astrofísica de Canaria

Contributors

  • 1. Planetary Science Institute

Description

TOI 1246 is one of only eight four-planet systems with measured masses and radii for all four planets. TESS observed this moderately bright K dwarf (V=11.6, K=9.9) for 12 sectors, and found four transiting planets. We collected 90 RV observations with Keck/HIRES and TNG/HARPS-N, many of which were contemporaneous with TESS photometry. We refit the photometry to refine planet radii, measure masses for all four planets, and find a surprising range of masses and densities. This system is brighter 93% of other four planet systems, and is a particularly interesting testing ground for mass loss and formation hypotheses due to the high planet multiplicity and varied planet masses.

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Additional details

References

  • Tamayo, Daniel et al. (2020), arXiv:2007.06521