An independent discovery of two hot Jupiters from the K2 mission
release_dxd6k7bi3jbehofwgwpuw6r5zi
by
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
2016
Abstract
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 0.65 ±
0.14 M_J, a radius of 1.070 ± 0.018 R_J and transits its G dwarf (T_eff
= 5675 ± 50 K), slightly metal rich ([Fe/H]=+0.06±0.04 dex) host star in
a 4.1 days circular orbit. K2-34b has a mass of 1.63 ± 0.12 M_J, a radius
of 1.38 ± 0.014 R_J and has an orbital period of 3.0 days in which it
orbits a late F dwarf (T_eff = 6149 ± 55 K) solar metallicity star. Both
planets were validated probabilistically and confirmed via precision radial
velocity (RV) measurements. 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.
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