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K2-30 b and K2-34 b: Two inflated hot Jupiters around solar-type stars

J. Lillo Box, O. Demangeon, A. Santerne, S. C. C. Barros, D. Barrado, G. Hébrard, H. P. Osborn, D. J. Armstrong, J.-M. Almenara, I. Boisse, F. Bouchy, D. Brown, B. Courcol, M. Deleuil, E. Delgado Mena, R. F. Díaz, J. Kirk, K. W. F. Lam, J. McCormac, D. Pollacco, A. S. Rajpurohit, J. Rey, N. C. Santos, S. G. Sousa, M. Tsantaki, P. A. Wilson

Abstract
We report the discovery of the two hot Jupiters K2-30 b and K2-34 b. The two planets were detected during campaigns 4 and 5 of the extension of the Kepler mission, K2; they transit their main-sequence stars with periods of ~4.099 and ~2.996 days. Subsequent ground-based radial velocity follow-up with SOPHIE, HARPS-N, and CAFE established the planetary nature of the transiting objects. We analyzed the transit signal, radial velocity, and spectral energy distributions of the two systems to characterize their properties. Both planets (K2-30 b and K2-34 b) are bloated hot Jupiters (1.20 RJup and 1.22 RJup) around relatively bright (V = 13.5 and V = 11.5) slow rotating main-sequence (G8 and F9) stars. Thus, these systems are good candidates for detecting the Rossiter-MacLaughlin effect in order to measure their obliquity and for atmospheric studies.

Keywords
planets and satellites: detection, planets and satellites: gaseous planets, techniques: radial velocities, techniques: photometric, techniques: high angular resolution

Notes
Full Tables 1 and 2 are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/594/A50

Astronomy and Astrophysics
Volume 594, Article Number A50, Number of pages 7
2016 October

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia