J/A+A/704/A174ivo://CDS.VizieR/J/A+A/704/A174CDSLuque R.Lam K.W.F.Cabrera J.Bonfanti A.Eschen Y.Olofsson G.,Benz W.Billot N.Brandeker A.Correia A.C.M.Fossati L.Gandolfi D.,Osborn H.P.Pezzotti C.Sousa S.G.Wilson T.G.Wolf S.Alibert Y.,Alonso R.Asquier J.Barczy T.Barrado D.Barros S.C.Baumjohann W.,Biondi F.Borsato L.Broeg C.Collier Cameron A.Csizmadia Sz.,Cubillos P.E.Davies M.B.Deleuil M.Deline A.Demangeon O.D.S.,Demory B.-O.Derekas A.Edwards B.Egger J.A.Ehrenreich D.Erikson A.,Fortier A.Fridlund M.Gazeas K.Gillon M.Guedel M.Guenther M.N.,Heitzmann A.Helling C.Isaak K.G.Keller T.Kiss L.Korth J.,Laskar J.Lecavelier des Etangs A.Leleu A.Lendl M.Magrin D.,Mantovan G.Maxted P.F.L.Merin B.Mordasini C.Nascimbeni V.,Ottensamer R.Pagano I.Palle E.Peter G.Piazza D.Piotto G.,Pollacco D.Queloz D.Ragazzoni R.Rando N.Rauer H.Ribas I.,Santos N.C.Scandariato G.Segransan D.Simon A.E.Smith A.M.S.,Stalport M.Sulis S.Szabo M.Gy.Udry S.Ulmer B.Ulmer-Moll S.,Van Grootel V.Venturini J.Villaver E.Walton N.A.Wolter D.2026-05-27T16:08:33Z2025-12-11T09:14:41ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsg-starsphotometryvisible-astronomyWe aim to refine the fundamental parameters of the TOI-2141 planetary system, which includes a transiting sub-Neptune orbiting a Sun-like star in a relatively long orbit of 18.26 days, by combining new photometric and spectroscopic observations. We analyze new space-based photometry from TESS and CHEOPS as well as 61 radial velocity measurements from HARPS-N. We perform individual and joint photometric and RV analyses using several modeling tools within a Bayesian model comparison framework. We refine the radius and mass of the transiting planet TOI-2141 b to 3.15+/-0.04R_{Earth}_ and 20.1+/-1.6M_{Earth}_, respectively, five and two times more precise than the previously reported values. Our radial velocity analysis reveals two additional non-transiting companions with orbital periods of 5.46 and 60.45 days. Despite the innermost planet's high geometric transit probability, we find no evidence for transits in the photometric data. The bulk properties of TOI-2141 b suggest a significant volatile envelope atop an Earth-like core, with modeling indicating a hydrogen-rich atmosphere that may have experienced mild photoevaporation over the system's history. Planets b and c must exhibit a modest mutual inclination of at least 2.4 degrees.2025A&A...704A.174Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/704/A174CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/680/A84 : TOI-1736 and TOI-2141 SOPHIE observations (Martioli+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/704/A174https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/704/A174http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/704/A174https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/704/A174https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/704/A174http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/704/A174GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/704/A174/visit1CHEOPS visit 1 (2023-05-05) light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleFluxrawRaw relative fluxphot.flux;arith.ratiodoublee_FluxrawRaw relative flux errorstat.errordoubleFluxdetrDetrended relative fluxphot.flux;arith.ratiodoublee_FluxdetrDetrended relative flux errorstat.errordoubleVisitNumber[1/5] Visit numbermeta.id;obsintJ/A+A/704/A174/visit2CHEOPS visit 2 (2023-06-10) light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleFluxrawRaw relative fluxphot.flux;arith.ratiodoublee_FluxrawRaw relative flux errorstat.errordoubleFluxdetrDetrended relative fluxphot.flux;arith.ratiodoublee_FluxdetrDetrended relative flux errorstat.errordoubleVisitNumber[1/5] Visit numbermeta.id;obsintJ/A+A/704/A174/visit3CHEOPS visit 3 (2023-06-28) light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleFluxrawRaw relative fluxphot.flux;arith.ratiodoublee_FluxrawRaw relative flux errorstat.errordoubleFluxdetrDetrended relative fluxphot.flux;arith.ratiodoublee_FluxdetrDetrended relative flux errorstat.errordoubleVisitNumber[1/5] Visit numbermeta.id;obsintJ/A+A/704/A174/visit4CHEOPS visit 4 (2024-06-28) light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleFluxrawRaw relative fluxphot.flux;arith.ratiodoublee_FluxrawRaw relative flux errorstat.errordoubleFluxdetrDetrended relative fluxphot.flux;arith.ratiodoublee_FluxdetrDetrended relative flux errorstat.errordoubleVisitNumber[1/5] Visit numbermeta.id;obsintJ/A+A/704/A174/visit5CHEOPS visit 5 (2024-07-16) light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleFluxrawRaw relative fluxphot.flux;arith.ratiodoublee_FluxrawRaw relative flux errorstat.errordoubleFluxdetrDetrended relative fluxphot.flux;arith.ratiodoublee_FluxdetrDetrended relative flux errorstat.errordoubleVisitNumber[1/5] Visit numbermeta.id;obsint