• DOI:10.3847/1538-3881/ab0e8e
• Corpus ID: 119240124

The Curious Case of KOI 4: ConfirmingKepler’sFirst Exoplanet Detection

@article{Chontos2019TheCC,
  title={The Curious Case of KOI 4: ConfirmingKepler’sFirst Exoplanet Detection},
  author={Ashley Chontos and Daniel Huber and David W. Latham and Allyson Bieryla and Vincent Van Eylen and Timothy R. Bedding and Travis A. Berger and Lars A. Buchhave and Tiago L. Campante and William J. Chaplin and Isabel L. Colman and Jeffrey L. Coughlin and Guy R. Davies and Teruyuki Hirano and Andrew W. Howard and Howard T. Isaacson},
  journal={The Astronomical Journal},
  year={2019}
}

• A. Chontos, D. Huber, +13 authors H. Isaacson
• Published 4 March 2019
• Physics, Geology
• The Astronomical Journal

The discovery of thousands of planetary systems by Kepler has demonstrated that planets are ubiquitous. However, a major challenge has been the confirmation of Kepler planet candidates, many of which still await confirmation. One of the most enigmatic examples is KOI 4.01, Kepler's first discovered planet candidate detection (as KOI 1.01, 2.01, and 3.01 were known prior to launch). Here we present the confirmation and characterization of KOI 4.01 (now Kepler-1658), using a combination of asteroseismology and radial velocities. Kepler-1658 is a massive, evolved subgiant (Mstar = 1.45 +/- 0.06 Msun, Rstar = 2.89 +/- 0.12 Rsun) hosting a massive (Mp = 5.88 +/- 0.47 MJ, Rp = 1.07 +/- 0.05 RJ) hot Jupiter that orbits every 3.85 days. Kepler-1658 joins a small population of evolved hosts with short-period ( = 4.826 x 10^3 for the tidal quality factor in evolved stars. With an effective temperature Teff ~6200 K, Kepler-1658 sits close to the spin-orbit misalignment boundary at ~6250 K, making it a prime target for follow-up observations to better constrain its obliquity and to provide insight into theories for hot Jupiter formation and migration.