J/AJ/158/177ivo://CDS.VizieR/J/AJ/158/177doi:10.26093/cds/vizier.51580177CDSQuinn S.N.Becker J.C.Rodriguez J.E.Hadden S.Huang C.X.,Morton T.D.Adams F.C.Armstrong D.Eastman J.D.Horner J.Kane S.R.,Lissauer J.J.Twicken J.D.Vanderburg A.Wittenmyer R.Ricker G.R.,Vanderspek R.K.Latham D.W.Seager S.Winn J.N.Jenkins J.M.Agol E.,Barkaoui K.Beichman C.A.Bouchy F.Bouma L.G.Burdanov A.,Campbell J.Carlino R.Cartwright S.M.Charbonneau D.,Christiansen J.L.Ciardi D.Collins K.A.Collins K.I.Conti D.M.,Crossfield I.J.M.Daylan T.Dittmann J.Doty J.Dragomir D.Ducrot E.,Gillon M.Glidden A.Goeke R.F.Gonzales E.J.Helminiak K.G.,Horch E.P.Howell S.B.Jehin E.Jensen E.L.N.Kielkopf J.F.,Kristiansen M.H.Law N.Mann A.W.Marmier M.Matson R.A.Matthews E.,Mazeh T.Mori M.Murgas F.Murray C.Narita N.Nielsen L.D.,Ottoni G.Palle E.Pawlaszek R.Pepe F.de Leon J.P.Pozuelos F.J.,Relles H.M.Schlieder J.E.Sebastian D.Segransan D.Shporer A.,Stassun K.G.Tamura M.Udry S.Waite I.Winters J.G.Ziegler C.2020-04-08T13:16:51Z2020-01-14T08:43:35ZCDS support team

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

cds-question@unistra.frexoplanetsastronomical-modelsWe report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V=10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79, and 2.94 R_{Earth}_), and we statistically validate the planetary nature of the two inner planets (P_b_=4.65 days, P_c_=9.15 days). With only two transits observed, we report the outer object (P_.03_=19.98 days) as a planet candidate with high signal-to-noise ratio. We also detect a candidate transiting super-Earth (1.4 R_{Earth}_) with an orbital period of only 12.7 hr and a candidate Neptune-sized planet (4.2 R_{Earth}_) with a period of 13.28 days, both at low signal-to-noise ratio. This system is amenable to mass determination via radial velocities and transit-timing variations, and provides an opportunity to study planets of similar size while controlling for age and environment. The ratio of orbital periods between TOI-125 b and c (P_c_/P_b_=1.97) is slightly lower than an exact 2:1 commensurability and is atypical of multiple planet systems from Kepler, which show a preference for period ratios just wide of first-order period ratios. A dynamical analysis refines the allowed parameter space through stability arguments and suggests that despite the nearly commensurate periods, the system is unlikely to be in resonance.2019AJ....158..177Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/177CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)J/AJ/156/102 : The TESS Input Catalog and Candidate Target ListJ/ApJS/239/2 : Simulated exoplanets from TESS list of targets (Barclay+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/177https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/158/177/fig9Results of simulation used to create Figure 9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintN[0/8989] Row indexmeta.idintResResonant behaviormeta.notecharTrial[4501/7867] Trial numbermeta.numberintStab[yes no] Whole system stable?meta.codecharEnd[2.1548928/1000614.648] End time of simulationyrtime.epochdoublea[0.049433/0.14511] Initial semi-major axisAUphys.size.smajAxisdoublee[7.1e-05/0.502095] Initial orbital eccentricitysrc.orbital.eccentricitydoublei[87.5434/89.9991] Initial orbital inclinationdegsrc.orbital.inclinationfloatMp/M*[1.1e-05/0.000102] Planet-star mass ratiophys.mass;arith.ratiodoubleperi[0.0416/359.746] Initial longitude of periastrondegsrc.orbital.periastrondoublepl[0/2] Planet numbermeta.numberint