J/MNRAS/499/5004ivo://CDS.VizieR/J/MNRAS/499/5004doi:10.26093/cds/vizier.74995004CDSMortier A.Zapatero Osorio M.R.Malavolta L.Alibert Y.Rice K.,Lillo-box J.Vanderburg A.Oshagh M.Buchhave L.Adibekyan V.,Delgado Mena E.Lopez-morales M.Charbonneau D.Sousa S.G.Lovis C.,Affer L.Allende Prieto C.Barros S.C.C.Benatti S.Bonomo A.S.,Boschin W.Bouchy F.Cabral A.Collier Cameron A.Cosentino R.,Cristiani S.Demangeon O.D.S.Di Marcantonio P.D'odorico V.,Dumusque X.Ehrenreich D.Figueira P.Fiorenzano A.Ghedina A.,Gonzalez Hernandez J.I.Haldemann J.Harutyunyan A.Haywood R.D.,Latham D.W.Lavie B.Lo Curto G.Maldonado J.Manescau A.,Martins C.J.A.P.Mayor M.Megevand D.Mehner A.Micela G.Molaro P.,Molinari E.Nunes N.J.Pepe F.A.Palle E.Phillips D.Piotto G.,Pinamonti M.Poretti E.Riva M.Rebolo R.Santos N.C.Sasselov D.,Sozzetti A.Suarez Mascareno A.Udry S.West R.G.Watson C.A.,Wilson T.G.2024-08-21T20:16:31Z2020-12-14T09:04:33ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frg-starsexoplanetsphotometryradial-velocityThis 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 (logg=4.17), iron-poor ([Fe/H]=-0.46), but alpha-enhanced ([{alpha}/Fe]=0.27), chromospherically quiet, very old thick disc G2 star. A global fit, performed by using PyORBIT shows that the transiting planet, K2-111 b, orbits with a period P_b_=5.3518+/-0.0004d, and has a planet radius of 1.82^+0.11^_-0.09_R_{Earth}_ and a mass of 5.29^+0.76^_-0.77_ M_{Earth}_, resulting in a bulk density slightly lower than that of the Earth. The stellar chemical composition and the planet properties are consistent with K2-111 b being a terrestrial planet with an iron core mass fraction lower than the Earth. We announce the existence of a second signal in the radial velocity data that we attribute to a non-transiting planet, K2-111 c, with an orbital period of 15.6785+/-0.0064 days, orbiting in near-3:1 mean-motion resonance with the transiting planet, and a minimum planet mass of 11.3+/-1.1 M_{Earth}_. Both planet signals are independently detected in the HARPS-N and ESPRESSO data when fitted separately. There are potentially more planets in this resonant system, but more well-sampled data are required to confirm their presence and physical parameters.2020MNRAS.499.5004Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/5004CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/5004https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/5004http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/5004https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/5004https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/5004http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/5004GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/499/5004/tablervRadial velocity and activity indicators of K2-111recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument (ESPRESSO or HARPS-N)meta.id;instrcharBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVError on radial velocitykm/sstat.errorfloatFWHMFull-width-at-half-maximum of the CCFkm/sphys.angSizefloate_FWHMError on the FWHMkm/sstat.error;phys.angSizefloatHaH alpha indexspect.indexfloate_HaError on the H alpha indexstat.errorfloatNaSodium ID indexspect.indexfloate_NaError on the Sodium ID indexstat.errorfloatSMWMount Wilson S indexphot.flux;arith.ratiofloate_SMWError on the Mount Wilson S indexstat.errorfloatRHKlog R'HKphot.flux;arith.ratiofloate_RHKError on the log R'HKstat.errorfloatJ/MNRAS/499/5004/tablep1K2 photometry of K2-111recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Datedtime.epochdoubleFluxNormalised and flattened fluxphot.flux;arith.ratiodoublee_FluxError on the normalised and flattened fluxstat.error;phot.fluxdoubleJ/MNRAS/499/5004/tablep2WASP and ASAS-SN photometry of K2-111recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Datedtime.epochdoubleFluxNormalised fluxphot.flux;arith.ratiodoublee_FluxError on the normalised fluxstat.error;phot.fluxdoubleInstInstrument (WASP, ASAS-SN V or ASAS-SN g)meta.id;instrchar