J/A+A/704/A41ivo://CDS.VizieR/J/A+A/704/A41CDSBarone A.Rodler F.Gandolfi D.Bonfanti A.Leonardi P.Visca L.,Fridlund M.Brogi M.Fossati L.Cubillos P.E.Cochran W.D.,Csizmadia S.Livingston J.Nowak G.Palle E.Persson C.M.Redfield S.,Schmerling H.Smith A.M.S.2026-03-02T06:25:50Z2025-12-05T09:15:05ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityspectroscopyTOI-282 is a bright (V=9.38) F8 main-sequence star known to host three transiting long-period (Pb=22.9d, Pc=56.0d, Pd=84.3d) small (Rp~=2-4R_{Earth}_) planets. The orbital period ratio of the two outermost planets, namely TOI-282 c and d, is close to the 3:2 commensurability, suggesting that the planets might be trapped in a mean motion resonance. We combined space-borne photometry from the TESS telescope with high-precision HARPS and ESPRESSO Doppler measurements to refine orbital parameters, measure the planetary masses, and investigate the architecture and evolution of the system. We performed a Markov chain Monte Carlo joint analysis of the transit light curves and radial velocity time series, and carried out a dynamical analysis to model transit timing variations and Doppler measurements along with N-body integration. In agreement with previous results, we found that TOI-282 b, c, and d have radii of Rb=2.69+/-0.23 R_{Earth}_, Rc=4.13^+0.16^_-0.14^R_{Earth}_, and Rd=3.11+/-0.15R_{Earth}_, respectively. We measured planetary masses of Mb=6.2+/-1.6M_{Earth}_, Mc=9.2+/-2.0M_{Earth}_, and Md=5.8^+0.9^_-1.1_M_{Earth}_, which imply mean densities of {rho}b=1.8^+0.7^_-0.6_g/cm^3^, {rho}c=0.7+/-0.2g/cm^3^, and {rho}d=1.1^+0.3^_-0.2_g/cm^3^, respectively. The three planets may be water worlds, making TOI-282 an interesting system for future atmospheric follow-up observations with JWST and ELT.2025A&A...704A..41Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/704/A41CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/704/A41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/704/A41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/704/A41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/704/A41https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/704/A41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/704/A41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/704/A41/harpsrvHARPS radial velocities (table B1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (TDB)dtime.epochdoubleRVRadial velocities (raw)km/sphys.veloc;pos.heliocentricdoublee_RVRV sigma (raw)km/sstat.errordoubleRVdetrRadial velocities (detrended)km/sphys.veloc;pos.heliocentricdoublee_RVdetrRV sigma (detrended)km/sstat.errordoubleFWHMCCF's FWHMkm/sspect.line.widthdoubleContrastCCF's height%phot.flux;arith.ratiodoubleSkewnessCCF's skewnessstat.fit.paramdoubleTexpExposure timestime.duration;obs.exposurefloatS/NSignal to noise ratiostat.snrdoubleJ/A+A/704/A41/espres1ESPRESSO 1st set radial velocities (table B3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (TDB)dtime.epochdoubleRVRadial velocities (raw)km/sphys.veloc;pos.heliocentricdoublee_RVRV sigma (raw)km/sstat.errordoubleRVdetrRadial velocities (detrended)km/sphys.veloc;pos.heliocentricdoublee_RVdetrRV sigma (detrended)km/sstat.errordoubleFWHMCCF's FWHMkm/sspect.line.widthdoubleContrastCCF's height%phot.flux;arith.ratiodoubleSkewnessCCF's skewnessstat.fit.paramdoubleTexpExposure timestime.duration;obs.exposurefloatS/NSignal to noise ratiostat.snrdoubleJ/A+A/704/A41/espres2ESPRESSO 2nd set radial velocities (table B1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (TDB)dtime.epochdoubleRVRadial velocities (raw)km/sphys.veloc;pos.heliocentricdoublee_RVRV sigma (raw)km/sstat.errordoubleRVdetrRadial velocities (detrended)km/sphys.veloc;pos.heliocentricdoublee_RVdetrRV sigma (detrended)km/sstat.errordoubleFWHMCCF's FWHMkm/sspect.line.widthdoubleContrastCCF's height%phot.flux;arith.ratiodoubleSkewnessCCF's skewnessstat.fit.paramdoubleTexpExposure timestime.duration;obs.exposurefloatS/NSignal to noise ratiostat.snrdoubleJ/A+A/704/A41/harpsaiTOI-282's activity indicators extracted with HARPS (table B2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (TDB)dtime.epochdoublelogRHKCaII H&K chromospheric indexphot.flux;arith.ratiofloate_logRHKlogRHK sigmastat.errorfloatNaD1NaD1 line activity indicator0.1nmspect.indexdoubleNaD2NaD2 line activity indicator0.1nmspect.indexdoubleHalphaHalpha line activity indicator0.1nminstr.setup;spect.linedouble