Exomoon survey of 70 great giant exoplanets and a new candidate Kepler-1708 bi

Exomoon survey of 70 great giant exoplanets and a new candidate Kepler-1708 bi

The signal of the exomoon candidate, Kepler-1708 b-i, is a 4.8-sigma effect and is persistent across different instrumental detrending methods, with a 1% false-positive probability via injection-recovery. Kepler-1708 b-i is ~2.6 Earth radii and is located in an approximately coplanar orbit at ~12 planetary radii from its ~1.6AU Jupiter-sized host. Future observations will be necessary to validate or reject the candidate.

Story Highlights:

  • To address this deficiency, we here describe an exomoon survey of 70 cool, giant transiting exoplanet candidates found by Kepler. We identify only one which exhibits a moon-like signal that passes a battery of vetting tests: Kepler-1708 b. We show that Kepler-1708 b is a statistically validated Jupiter-sized planet orbiting a Sun-like quiescent star at ~1.6AU.

  • David Kipping, Steve Bryson, Chris Burke, Jessie Christiansen, Kevin Hardegree-Ullman, Billy Quarles, Brad Hansen, Judit Szulágyi, Alex Teachey

Comments: 115 pages, 24 figures, 4 tables. Published in Nature Astronomy. Posteriors available at this https URLSubjects: Earth and Planetary Astrophysics (astro-ph.EP)DOI: 10.1038/s41550-021-01539-1Cite as: arXiv:2201.04643 [astro-ph.EP] (or arXiv:2201.04643v1 [astro-ph.EP] for this version)Submission historyFrom: David Kipping [v1] Wed, 12 Jan 2022 19:00:03 UTC (3,740 KB)https://arxiv.org/abs/2201.04643

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