KELT-14b and KELT-15b: An Independent Discovery of WASP-122b and a New Hot Jupiter
Abstract
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}-0.7+0.3 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}-0.07+0.05 M⊙ and radius {R}* = 1.37+/- -0.08 R⊙, and has {T}{{eff}} = {5802}-92+95 K, {log}{g}* = {4.23}-0.04+0.05 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}-0.11+0.12 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}-0.4+0.5 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}-0.050+0.051 M⊙ and radius {R}* = {1.48}-0.04+0.09 R⊙, and {T}{{eff}} = {6003}-52+56 K, {log}{g}* = {4.17}-0.04+0.02 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}-0.057+0.11 RJ and mass Mp = {0.91}-0.22+0.21 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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- June 2016
- DOI:
- 10.3847/0004-6256/151/6/138
- arXiv:
- arXiv:1509.08953
- Bibcode:
- 2016AJ....151..138R
- Keywords:
-
- planetary systems;
- stars: individual: KELT-14;
- KELT-15;
- techniques: photometric;
- techniques: radial velocities;
- techniques: spectroscopic;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 15 pages, 11 figures, 9 tables, Accepted for publication in AJ