K2-111: an old system with two planets in near-resonance*

A Mortier, M R Zapatero Osorio, L Malavolta, Y Alibert, K Rice, J Lillo-Box, A Vanderburg, M Oshagh, L Buchhave, V Adibekyan, E Delgado Mena, M Lopez-Morales, D Charbonneau, S G Sousa, C Lovis, L Affer, C Allende Prieto, S C C Barros, S Benatti, A S BonomoW Boschin, F Bouchy, A Cabral, A Collier Cameron, R Cosentino, S Cristiani, O D S Demangeon, P Di Marcantonio, V D’Odorico, X Dumusque, D Ehrenreich, P Figueira, A Fiorenzano, A Ghedina, J I González Hernández, J Haldemann, A Harutyunyan, R D Haywood, D W Latham, B Lavie, G Lo Curto, J Maldonado, A Manescau, C J A P Martins, M Mayor, D Mégevand, A Mehner, G Micela, P Molaro, E Molinari, N J Nunes, F A Pepe, E Palle, D Phillips, G Piotto, M Pinamonti, E Poretti, M Riva, R Rebolo, N C Santos, D Sasselov, A Sozzetti, A Suárez Mascareño, S Udry, R G West, C A Watson, T G Wilson

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This paper reports on the detailed characterisation of the K2-111 planetary system with K2, WASP, and ASAS-SN photometry as well as high-resolution spectroscopic data from HARPS-N and ESPRESSO. The host, K2-111, is confirmed to be a mildly evolved (log g = 4.17), iron-poor ([Fe/H]=−0.46), but alpha-enhanced ([α/Fe]=0.27), chromospherically quiet, very old thick disc G2 star.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Pages (from-to)5004–5021
Publication statusPublished - 2020

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