K2-237 b and K2-238 b: Discovery and characterization of two new transiting hot Jupiters from K2

M. G. Soto, M. R. Díaz, J. S. Jenkins, F. Rojas, N. Espinoza, R. Brahm, H. Drass, M. I. Jones, M. Rabus, J. Hartman, P. Sarkis, A. Jordán, R. Lachaume, B. Pantoja, M. Vučković, D. R. Ciardi, I. Crossfield, C. Dressing, E. Gonzales, L. Hirsch

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report the discovery of two hot Jupiters orbiting the stars K2-237 and K2-238. We used photometric data from Campaigns 11 and 12 of the Kepler K2 mission and radial velocity data obtained using the HARPS, FEROS, and CORALIE spectrographs. K2-237 b and K2-238 b have masses of 1.60-0.11+0.11 and 0.86+-0.120.13MJup, radii of 1.65-0.08+0.07 and 1.30-0.14+0.15 RJup, and are orbiting their host stars in 2.18-and 3.20-d orbits, respectively. The large radius of K2-237 b leads us to conclude that this candidate corresponds to a highly inflated hot Jupiter. K2-238 b has a radius consistent with theoretical models, considering the high incident flux falling on the planet. We consider K2-237 b to be an excellent system for follow-up studies, since not only is it very inflated, but it also orbits a relatively bright star (V = 11.6).

Original languageEnglish
Pages (from-to)5356-5365
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume478
Issue number4
DOIs
StatePublished - 21 Aug 2018
Externally publishedYes

Keywords

  • Planets and satellites: detection
  • Planets and satellites: fundamental parameters

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