KELT-14b and KELT-15b: an independent discovery of WASP-122b and a new hot Jupiter

Joseph E. Rodriguez, Knicole D. Colón, 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 UdryDamien 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

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

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+0.3-0.7 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.

Original languageEnglish
Article number138
Pages (from-to)1-16
Number of pages16
JournalAstronomical Journal
Volume151
Issue number6
DOIs
Publication statusPublished - 1 Jun 2016
Externally publishedYes

Keywords

  • planetary systems
  • stars: individual (KELT-14, KELT-15)
  • techniques: photometric
  • techniques: radial velocities
  • techniques: spectro

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