An independent discovery of two hot jupiters from the K2 mission

Rafael Brahm, Matías Jones, Néstor Espinoza, Andrés Jordán, Markus Rabus, Felipe Rojas, James S. Jenkins, Cristián Cortés, Holger Drass, Blake Pantoja, Maritza G. Soto, Maja Vučković

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12 Scopus citations


We report the discovery of two hot Jupiters using photometry from Campaigns 4 and 5 of the two-wheeled Kepler (K2) mission. K2-30b has a mass of 0.589 ± 0.023 MJ, a radius of 1.069 ± 0.021 RJ, and transits its G dwarf (Teff = 5675 ± 50 K), slightly metal-rich ([Fe/H] = +0.06 ± 0.04 dex) host star in a 4.1 day circular orbit. K2-4b has a mass of 1.698 ± 0.055 MJ, a radius of 1.377 ± 0.014 RJ =, and an orbital period of 3.0 days in which it orbits a late F dwarf (Teff = 6149 ± 55 K) solar metallicity star. Both planets were confirmed via precision radial velocity (RV) measurements obtained with three spectrographs from the southern hemisphere. They have physical and orbital properties similar to the ones of the already uncovered population of hot Jupiters and are well-suited candidates for further orbital and atmospheric characterization via detailed follow-up observations. Given that the discovery of both systems was recently reported by other groups we take the opportunity of refining the planetary parameters by including the RVs obtained by these independent studies in our global analysis.

Original languageEnglish
Article number124402
JournalPublications of the Astronomical Society of the Pacific
Issue number970
StatePublished - 1 Dec 2016
Externally publishedYes


  • Planets and satellites: Detection


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