We report the discovery of KELT-14b and KELT-15b, two hot Jupiters from the KELT-South survey. KELT-14b, an independent discovery of the recently announced WASP-122b, is an inflated Jupiter mass planet that orbits a ∼5.0+0.3-0.7 Gyr, V = 11.0, G2 star that is near the main sequence turnoff. The host star, KELT-14 (TYC 7638-981-1), has an inferred mass M∗ = 1.18+0.05-0.07 M⊙ and radius R∗ = 1.37 ± -0.08 R⊙, and has Teff = 5802+95-92 K, logg∗ = 4.23+0.05-0.04 and [Fe/H] = 0.33 ± −0.09. The planet orbits with a period of 1.7100588 ± 0.0000025 days (T0 = 2457091.02863 ± 0.00047) and has a radius Rp = 1.52+0.12-0.11 RJ and mass Mp = 1.196 ± 0.072 MJ, and the eccentricity is consistent with zero. KELT-15b is another inflated Jupiter mass planet that orbits a ~4.6+0.5-0.4 Gyr, V = 11.2, G0 star (TYC 8146-86-1) that is near the "blue hook" stage of evolution prior to the Hertzsprung gap, and has an inferred mass M∗= 1.181+0.051-0.050 M⊙ and radius R∗ = 1.48+0.09-0.04 R⊙, and Teff = 6003+56-52 K,logg∗ = 4.17+0.02-0.04 and [Fe/H] = 0.05 ± 0.03. The planet orbits on a period of 3.329441 ± 0.000016 days (T0 = 2457029.1663 ± 0.0073) and has a radius Rp = 1.443+0.11-0.057 RJ and mass Mp = 0.91+0.21-0.22 MJ and an eccentricity consistent with zero. KELT-14b has the second largest expected emission signal in the K-band for known transiting planets brighter than K < 10.5. Both KELT-14b and KELT-15b are predicted to have large enough emission signals that their secondary eclipses should be detectable using ground-based observatories.
|Number of pages||16|
|Publication status||Published - 1 Jun 2016|
- planetary systems
- stars: individual (KELT-14, KELT-15)
- techniques: photometric
- techniques: radial velocities
- techniques: spectro