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Title: KELT-3b: A HOT JUPITER TRANSITING A V = 9.8 LATE-F STAR

We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with a mass of 1.477{sub -0.067}{sup +0.066} M{sub J}, radius of 1.345 {+-} 0.072 R{sub J}, and an orbital period of 2.7033904 {+-} 0.000010 days. The host star, KELT-3, is a V = 9.8 late F star with M{sub *} = 1.278{sub -0.061}{sup +0.063} M{sub sun}, R{sub *} = 1.472{sub -0.067}{sup +0.065} R{sub sun}, T{sub eff}= 6306{sub -49}{sup +50} K, log (g) = 4.209{sub -0.031}{sup +0.033}, and [Fe/H] = 0.044{sub -0.082}{sup +0.080}, and has a likely proper motion companion. KELT-3b is the third transiting exoplanet discovered by the KELT survey, and is orbiting one of the 20 brightest known transiting planet host stars, making it a promising candidate for detailed characterization studies. Although we infer that KELT-3 is significantly evolved, a preliminary analysis of the stellar and orbital evolution of the system suggests that the planet has likely always received a level of incident flux above the empirically identified threshold for radius inflation suggested by Demory and Seager.
Authors:
 [1] ; ; ; ;  [2] ; ;  [3] ; ;  [4] ;  [5] ; ; ; ; ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] more »; « less
  1. Department of Physics, Lehigh University, Bethlehem, PA 18015 (United States)
  2. Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States)
  3. Department of Astronomy, Ohio State University, Columbus, OH 43210 (United States)
  4. Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117 (United States)
  5. Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292 (United States)
  6. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
  7. Niels Bohr Institute, University of Copenhagen, DK-21S00 Copenhagen (Denmark)
  8. Department of Physics and Astronomy, Swarthmore College, Swarthmore, PA 19081 (United States)
  9. Spot Observatory, Nunnelly, TN 37137 (United States)
  10. Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)
  11. Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)
Publication Date:
OSTI Identifier:
22131039
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 773; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; INFLATIONARY UNIVERSE; MASS; PLANETS; PROPER MOTION; STAR EVOLUTION; STARS