© ESO 2019Luque, R.Nowak, G.Pallé, E.Dai, F.Kaminski, A.Nagel, E.Hidalgo, D.Bauer, F. F.Lafarga, M.Livingston, J.Barragán, O.Hirano, T.Fridlund, M.Gandolfi, D.Justesen, A. B.Hjorth, M.Van Eylen, V.Winn, J. N.Esposito, M.Morales, J. C.Albrecht, S.Alonso, R.Amado, P. J.Beck, P.Caballero, J. A.Cabrera, J.Cochran, W. D.Csizmadia, Sz.Deeg, H.Eigmuller, Ph.Endl, M.Erikson, A.Fukui, A.Grziwa, S.Guenther, E. W.Hatzes, A. P.Knudstrup, E.Korth, J.Lam, K. W. F.Lund, M. N.Mathur, S.Montañés Rodríguez, P.Narita, N.Nespral, D.Niraula, P.Pätzold, M.Persson, C. M.Prieto Arranz, J.Quirrenbach, A.Rauer, H.Redfield, S.Reiners, A.Ribas, I.Smith, A. M. S.Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-07372021-04-142021-04-142019-03-14Astronomy and Astrophysics 623: A114(2019)0004-6361https://www.aanda.org/articles/aa/full_html/2019/03/aa34952-18/aa34952-18.htmlhttp://hdl.handle.net/20.500.12666/378The light curve is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/623/A114We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M⋆ = 1.00 ± 0.03 M⊙ and R⋆ = 1.09 ± 0.03 R⊙, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of Rp=2.63−0.10+0.12 R⊕ and mass of Mp=24.5−4.4+4.4 M⊕, yielding a mean density of ρp=7.4−1.5+1.6 g cm−3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γ˙RV = −0.40−0.07+0.07 m s−1 d−1) that suggests a long-period companion with a minimum mass on the order of 33 M⊕. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Planetary systemsTechniques: photometricTechniques: radial velocitiesTechniques: high angular resolutionStars: individual: HD 119130Stars: individual: K2-292info:eu-repo/semantics/article10.1051/0004-6361/2018349521432-0746http://dx.doi.org/10.13039/501100000781http://dx.doi.org/10.13039/501100003329http://dx.doi.org/10.13039/501100001691http://dx.doi.org/10.13039/501100001732http://dx.doi.org/10.13039/501100001659info:eu-repo/semantics/openAccess