KELT-3b: A Hot Jupiter Transiting a V = 9.8 Late-F Star
Abstract
We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with a mass of 1.477_{-0.067}^{+0.066} \,M_{J}, radius of 1.345 ± 0.072 R 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_* = 1.278_{-0.061}^{+0.063} \,M_{\odot }, R_* = 1.472_{-0.067}^{+0.065} \,R_{\odot }, T_eff = 6306_{-49}^{+50} K, log (g) = 4.209_{-0.031}^{+0.033}, and [Fe/H] = 0.044_{-0.082}^{+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 & Seager.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2013
- DOI:
- 10.1088/0004-637X/773/1/64
- arXiv:
- arXiv:1211.1031
- Bibcode:
- 2013ApJ...773...64P
- Keywords:
-
- planetary systems;
- planets and satellites: detection;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 12 pages, 12 figures, accepted to ApJ