J/A+A/682/A66ivo://CDS.VizieR/J/A+A/682/A66doi:10.26093/cds/vizier.36820066CDSBonfanti A.Brady M.Wilson T.G.Venturini J.Egger J.A.Brandeker A.,Sousa S.G.Lendl M.Simon A.E.Queloz D.Olofsson G.Adibekyan V.,Alibert Y.Fossati L.Hooton M.J.Kubyshkina D.Luque R.Murgas F.,Mustill A.J.Santos N.C.Van Grootel V.Alonso R.Asquier J.Bandy T.,Barczy T.Barrado Navascues D.Barros S.C.C.Baumjohann W.Bean J.,Beck M.Beck T.Benz W.Bergomi M.Billot N.Borsato L.Broeg C.,Collier Cameron A.Csizmadia Sz.Cubillos P.E.Davies M.B.Deleuil M.,Deline A.Delrez L.Demangeon O.D.S.Demory B.-O.Ehrenreich D.,Erikson A.Fortier A.Fridlund M.Gandolfi D.Gillon M.Guedel M.,Guenther M.N.Heitzmann A.Helling C.Hoyer S.Isaak K.G.Kasper D.,Kiss L.L.Lam K.W.F.Laskar J.Lecavelier des Etangs A.Magrin D.,Maxted P.F.L.Mordasini C.Nascimbeni V.Ottensamer R.Pagano I.,Palle E.Peter G.Piotto G.Pollacco D.Ragazzoni R.Rando N.,Rauer H.Ribas I.Scandariato G.Segransan D.Seifahrt A.,Smith A.M.S.Stalport M.Stefansson G.Steinberger M.Stuermer J.,Szabo Gy.M.Thomas N.Udry S.Villaver E.Walton N.A.Westerdorff K.,Zingales T.2024-11-07T20:01:22Z2024-02-06T10:02:52ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyTOI-732 is an M dwarf hosting two transiting planets, which are located on the two opposite sides of the radius valley. Inferring a reliable demographics for these kind of systems is key to understand their formation and evolution mechanisms. By doubling the number of available space-based observations and increasing the number of radial velocity (RV) measurements, we aim at refining the parameters of TOI-732 b and c. We also aim at using the results to study the slope of both the radius valley and the density valley for a well characterised sample of M dwarf exoplanets. We performed a global MCMC analysis by jointly modelling ground-based light curves, CHEOPS and TESS observations, along with RV time series both taken from the literature and obtained with the MAROON-X spectrograph. The slopes of the M dwarf valleys were quantified via a Support Vector Machine (SVM) procedure. TOI-732 b is an ultra short period planet (P=0.76837931_-0.00000042_^+0.00000039^d) with a radius R_b_=1.325_-0.058_^+0.057^R_{Earth}_, a mass M_b_=2.46+/-0.19M_{Earth}_, and thus a mean density rho_b_=5.8_-0.8_^+1.0^g/cm^3^, while the outer planet at P=12.252284+/-0.000013d has R_c_=2.39_-0.11_^+0.10^R_{Earth}_, M_c_=8.04_-0.48_^+0.50^M_{Earth}_, and thus rho_c_=3.24_-0.43_^+0.55^g/cm^3^. Even with respect to the most recently reported values, this work yields to smaller uncertainties on the transit depths and on the RV semi-amplitudes up to a factor of ~1.6 and ~2.4 for TOI-732 b and c, respectively. Both our interior structure calculations and the location of the planets in the Mass-Radius diagram leads us to classify TOI-732 b as a super-Earth and TOI-732 c as a mini-Neptune. Following the SVM approach, we quantified Rslope=-0.065_-0.013_^+0.024^, which is flatter than for Sun-like stars. In line with former analyses, we noted a more filled radius valley for M-planets and we further quantified the density valley slope as Rhoslope=-0.02_-0.04_^+0.12^. Compared to FGK stars, the weaker dependence of the position of the radius valley with orbital period might indicate a heavier influence of formation relative to evolution mechanisms in shaping the radius valley around M-dwarfs.2024A&A...682A..66Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A66CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/682/A66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/682/A66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/682/A66https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/682/A66https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/682/A66http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/682/A66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/682/A66/listList of TESS and CHEOPS detrended light curve filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFileNameName of the table with light curve data in subdirectory lcmeta.id;meta.tablecharLCShow the light curvemeta.ref.urlcharTitleTitle of the tablemeta.title;meta.tablechar