KELT-14b and KELT-15b: An Independent Discovery of WASP-122b and a New Hot Jupiter

Joseph E. Rodriguez; Knicole D. Colon; Keivan G. Stassun; Duncan Wright; Phillip A. Cargile; Daniel Bayliss; Joshua Pepper; Karen A. Collins; Rudolf B. Kuhn; Michael B. Lund; Robert J. Siverd; George Zhou; B. Scott Gaudi; C. G. Tinney; Kaloyan Penev; T. G. Tan; Chris Stockdale; Ivan A. Curtis; David James; Stephane Udry; Damien Segransan; Allyson Bieryla; David W. Latham; Thomas G. Beatty; Jason D. Eastman; Gordon Myers; Jonathan Bartz; Joao Bento; Eric L. N. Jensen; Thomas E. Oberst; Daniel J. Stevens

doi:10.3847/0004-6256/151/6/138

paper

KELT-14b and KELT-15b: An Independent Discovery of WASP-122b and a New Hot Jupiter

arXiv:1509.08953 · doi:10.3847/0004-6256/151/6/138

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 $\sim 5. 0_{- 0.7}^{+ 0.3}$ 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 $M_{*}$ = $1.1 8_{- 0.07}^{+ 0.05}$ $M_{⊙}$ and radius $R_{*}$ = $1.37 \pm - 0.08$ $R_{⊙}$ , and has $T_{e f f}$ = $580 2_{- 92}^{+ 95}$ K, $lo g g_{*}$ = $4.2 3_{- 0.04}^{+ 0.05}$ and = $0.33 \pm 0.09$ . The planet orbits with a period of $1.7100588 \pm 0.0000025$ days ( $T_{0}$ =2457091.02863 $\pm$ 0.00047) and has a radius R $_{p}$ = $1.5 2_{- 0.11}^{+ 0.12}$ $R_{J}$ and mass M $_{p}$ = $1.196 \pm 0.072$ $M_{J}$ , and the eccentricity is consistent with zero. KELT-15b is another inflated Jupiter mass planet that orbits a $\sim$ $4. 6_{- 0.4}^{+ 0.5}$ 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 $M_{*}$ = $1.18 1_{- 0.050}^{+ 0.051}$ $M_{⊙}$ and radius $R_{*}$ = $1.4 8_{- 0.04}^{+ 0.09}$ $R_{⊙}$ , and $T_{e f f}$ = $600 3_{- 52}^{+ 56}$ K, $lo g g_{*}$ = $4.1 7_{- 0.04}^{+ 0.02}$ and [Fe/H]= $0.05 \pm 0.03$ . The planet orbits on a period of $3.329441 \pm 0.000016$ days ( $T_{0}$ = 2457029.1663 $\pm$ 0.0073) and has a radius R $_{p}$ = $1.44 3_{- 0.057}^{+ 0.11}$ $R_{J}$ and mass M $_{p}$ = $0.9 1_{- 0.22}^{+ 0.21}$ $M_{J}$ 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.

15 pages, 11 figures, 9 tables, Accepted for publication in AJ

KELT-14b and KELT-15b: An Independent Discovery of WASP-122b and a New Hot Jupiter

Abstract

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