Journal
ASTRONOMICAL JOURNAL
Volume 161, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/abc6af
Keywords
Exoplanet astronomy; Astrostatistics; Planet hosting stars; Exoplanets
Categories
Funding
- NASA TESS Guest Investigator Program [80NSSC18K1583]
- Hellman Fellows Fund
- Alfred P. Sloan Foundation
- David and Lucile Packard Foundation
- NASA Exoplanets Research Program (XRP) [80NSSC20K0250]
- National Science Foundation Graduate Research Fellowship Program [DGE-1650115]
- ARC grant for Concerted Research Actions
- Wallonia Brussels Federation
- Swiss National Science Foundation (SNF)
- David and Lucile Packard Fellowship for Science and Engineering
- NASA [80NSSC18K0476]
- John Templeton Foundation
- HeisingSimons Foundation
- NASA's Science Mission directorate
- Belgian Fund for Scientific Research (Fond National de la Recherche Scientifique, FNRS) [FRFC 2.5.594.09.F]
- NSF [AST-1616624]
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TRICERATOPS is a new Bayesian tool for vetting and validating TESS Objects of Interest (TOIs), using criteria to classify TOIs and prioritize follow-up observations to confirm bona fide planets. It is currently the only tool that models transits from nearby contaminant stars in addition to the target star, aiming to identify false positives and confirm actual planets.
We present TRICERATOPS, a new Bayesian tool that can be used to vet and validate TESS Objects of Interest (TOIs). We test the tool on 68 TOIs that have been previously confirmed as planets or rejected as astrophysical false positives. By looking in the false-positive probability (FPP)-nearby false-positive probability (NFPP) plane, we define criteria that TOIs must meet to be classified as validated planets (FPP < 0.015 and NFPP < 10(-3)), likely planets (FPP < 0.5 and NFPP < 10(-3)), and likely nearby false positives (NFPP > 10(-1)). We apply this procedure on 384 unclassified TOIs and statistically validate 12, classify 125 as likely planets, and classify 52 as likely nearby false positives. Of the 12 statistically validated planets, 9 are newly validated. TRICERATOPS is currently the only TESS vetting and validation tool that models transits from nearby contaminant stars in addition to the target star. We therefore encourage use of this tool to prioritize follow-up observations that confirm bona fide planets and identify false positives originating from nearby stars.
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