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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 13747naa a2201753 4500 | |
| 001 | oai:research.chalmers.se:a3dc703b-5747-4c8f-9a74-ef713a7b2a8b | |
| 003 | SwePub | |
| 008 | 240217s2024 | |||||||||||000 ||eng| | |
| 009 | oai:lup.lub.lu.se:8c10e803-f46c-4d4d-9ff1-ea31d059fbee | |
| 009 | oai:DiVA.org:su-227978 | |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2023481802 DOI |
| 024 | 7 | a https://research.chalmers.se/publication/5399502 URI |
| 024 | 7 | a https://lup.lub.lu.se/record/8c10e803-f46c-4d4d-9ff1-ea31d059fbee2 URI |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2279782 URI |
| 040 | a (SwePub)cthd (SwePub)lud (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Bonfanti, A.u Austrian Academy of Sciences4 aut |
| 245 | 1 0 | a Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley ★,★★ |
| 264 | 1 | c 2024 |
| 338 | a electronic2 rdacarrier | |
| 520 | a TOI-732 is an M dwarf hosting two transiting planets that are located on the two opposite sides of the radius valley. Inferring a reliable demographics for this type of systems is key to understanding their formation and evolution mechanisms. Aims. 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 use the results to study the slope of the radius valley and the density valley for a well-characterised sample of M-dwarf exoplanets. Methods. We performed a global Markov chain Monte Carlo analysis by jointly modelling ground-based light curves and 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. Results. TOI-732 b is an ultrashort-period planet (P = 0.76837931−+000000004200000039 days) with a radius Rb = 1.325+−00057058 R☉, a mass Mb = 2.46 ± 0.19 M☉, and thus a mean density ρb = 5.8+−1008 g cm−3, while the outer planet at P = 12.252284 ± 0.000013 days has Rc = 2.39+−001011 R☉, Mc = 8.04+−005048 M☉, and thus ρc = 3.24+−005543 g cm−3. Even with respect to the most recently reported values, this work yields uncertainties on the transit depths and on the RV semi-amplitudes that are smaller up to a factor of ∼1.6 and ∼2.4 for TOI-732 b and c, respectively. Our calculations for the interior structure and the location of the planets in the mass-radius diagram lead us to classify TOI-732 b as a super-Earth and TOI-732 c as a mini-Neptune. Following the SVM approach, we quantified d log Rp,valley/d log P = −0.065+−00024013, which is flatter than for Sun-like stars. In line with former analyses, we note that the radius valley for M-dwarf planets is more densely populated, and we further quantify the slope of the density valley as d log ρ̂valley/d log P = −0.02+−001204. Conclusions. Compared to FGK stars, the weaker dependence of the position of the radius valley on the orbital period might indicate that the formation shapes the radius valley around M dwarfs more strongly than the evolution mechanisms. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a techniques: photometric | |
| 653 | a planets and satellites: fundamental parameters | |
| 653 | a stars: fundamental parameters | |
| 653 | a techniques: radial velocities | |
| 653 | a planets and satellites: fundamental parameters | |
| 653 | a stars: fundamental parameters | |
| 653 | a techniques: photometric | |
| 653 | a techniques: radial velocities | |
| 653 | a Landforms | |
| 653 | a Markov processes | |
| 653 | a Planets | |
| 653 | a Satellites | |
| 653 | a Time series analysis | |
| 653 | a Doublings | |
| 653 | a Evolution mechanism | |
| 653 | a Formation and evolutions | |
| 653 | a Formation mechanism | |
| 653 | a Planets and satellites: fundamental parameters | |
| 653 | a Radial velocity | |
| 653 | a Stars:fundamental parameters | |
| 653 | a Support vectors machine | |
| 653 | a Techniques: photometric | |
| 653 | a Techniques: radial velocities | |
| 653 | a Support vector machines | |
| 700 | 1 | a Davies, M.B.u Lund University,Lunds universitet,LUNARC - Centrum för Tekniska och Vetenskapliga Beräkningar vid Lunds Universitet,Annan verksamhet, LTH,Lunds Tekniska Högskola,Matematik (naturvetenskapliga fakulteten),Matematikcentrum,Institutioner vid LTH,LU profilområde: Naturlig och artificiell kognition,Lunds universitets profilområden,LUNARC, Centre for Scientific and Technical Computing at Lund University,Other operations, LTH,Faculty of Engineering, LTH,Mathematics (Faculty of Sciences),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Natural and Artificial Cognition,Lund University Profile areas4 aut0 (Swepub:lu)astr-mda |
| 700 | 1 | a Wilson, T.G.u The University of Warwick4 aut |
| 700 | 1 | a Venturini, J.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Egger, J. A.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Brandeker, Alexis,d 1974-u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)alexis |
| 700 | 1 | a Sousa, S. G.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Lendl, M.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Simon, A.E.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Queloz, D.u University Of Cambridge,Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)4 aut |
| 700 | 1 | a Olofsson, Göran,d 1944-u Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)olofsson |
| 700 | 1 | a Adibekyan, V.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Alibert, Y.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Fossati, L.4 aut |
| 700 | 1 | a Hooton, M.J.u University Of Cambridge4 aut |
| 700 | 1 | a Kubyshkina, D.4 aut |
| 700 | 1 | a Luque, R.u University of Chicago4 aut |
| 700 | 1 | a Murgas, F.u Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Mustill, A.J.u Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)astr-amu |
| 700 | 1 | a Santos, N. C.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Van Grootel, V.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Alonso, R.u Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Asquier, J.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Bandy, T.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Bárczy, T.4 aut |
| 700 | 1 | a Navascues, D. Barradou Centro de Astrobiologia (CAB)4 aut |
| 700 | 1 | a Barros, S.C.C.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Baumjohann, W.4 aut |
| 700 | 1 | a Bean, Jacob L.u University of Chicago4 aut |
| 700 | 1 | a Beck, M.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Beck, T.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Benz, W.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Bergomi, M.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Billot, N.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Borsato, L.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Broeg, C.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Collier Cameron, A.u University of St Andrews4 aut |
| 700 | 1 | a Csizmadia, Szilardu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Cubillos, P. E.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Davies, M. B.u Lunds universitet,Lund University4 aut |
| 700 | 1 | a Deleuil, M.u Laboratoire d'Astrophysique de Marseille4 aut |
| 700 | 1 | a Deline, A.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Delrez, L.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Demangeon, O.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Demory, B.O.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Ehrenreich, D.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Erikson, Andersu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Fortier, A.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Fridlund, Malcolm,d 1952u Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)malfri |
| 700 | 1 | a Gandolfi, D.u Universita degli Studi di Torino,University of Turin4 aut |
| 700 | 1 | a Gillon, Michaëlu Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Gudel, M.u Universität Wien,University of Vienna4 aut |
| 700 | 1 | a Günther, Maximilian N.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Heitzmann, A.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Helling, Ch.u Technische Universität Graz4 aut |
| 700 | 1 | a Hoyer, S.u Laboratoire d'Astrophysique de Marseille4 aut |
| 700 | 1 | a Isaak, K.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Kasper, D.u University of Chicago4 aut |
| 700 | 1 | a Kiss, L. L.u Eötvös Loránd University (ELTE),Magyar Tudomanyos Akademia,Hungarian Academy of Sciences4 aut |
| 700 | 1 | a Lam, K. W.F.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Laskar, J.u Observatoire de Paris,Paris Observatory4 aut |
| 700 | 1 | a des Etangs, A. L.u Institut d 'Astrophysique de Paris4 aut |
| 700 | 1 | a Magrin, D.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Maxted, P.u Keele University4 aut |
| 700 | 1 | a Mordasini, C.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Nascimbeni, Valeriou Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Ottensamer, R.u Universität Wien,University of Vienna4 aut |
| 700 | 1 | a Pagano, I.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Palle, Enricu Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut |
| 700 | 1 | a Peter, G.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Piotto, Giampaolo P.u Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Pollacco, D.u The University of Warwick4 aut |
| 700 | 1 | a Ragazzoni, R.u Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Rando, N.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Rauer, H.u Freie Universität Berlin,Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Ribas, I.u Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)4 aut |
| 700 | 1 | a Scandariato, Gaetanou Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Segransan, D.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Seifahrt, A.u University of Chicago4 aut |
| 700 | 1 | a Smith, A. M.S.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Stalport, M.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Stefánsson, G.u Princeton University4 aut |
| 700 | 1 | a Steinberger, M.4 aut |
| 700 | 1 | a Stürmer, J.4 aut |
| 700 | 1 | a Szabó, G.M.u Eötvös Loránd University (ELTE)4 aut |
| 700 | 1 | a Thomas, Nicolasu Universität Bern,University of Bern4 aut |
| 700 | 1 | a Udry, S.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Villaver, E.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut |
| 700 | 1 | a Walton, N. A.u University Of Cambridge4 aut |
| 700 | 1 | a Westerdorff, K.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Zingales, Tizianou Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua,University of Padova4 aut |
| 710 | 2 | a Austrian Academy of Sciencesb LUNARC - Centrum för Tekniska och Vetenskapliga Beräkningar vid Lunds Universitet4 org |
| 773 | 0 | t Astronomy and Astrophysicsg 682q 682x 0004-6361x 1432-0746 |
| 856 | 4 | u https://research.chalmers.se/publication/539950/file/539950_Fulltext.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u http://dx.doi.org/10.1051/0004-6361/202348180x freey FULLTEXT |
| 856 | 4 | u https://doi.org/10.1051/0004-6361/202348180y Fulltext |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/202348180 |
| 856 | 4 8 | u https://research.chalmers.se/publication/539950 |
| 856 | 4 8 | u https://lup.lub.lu.se/record/8c10e803-f46c-4d4d-9ff1-ea31d059fbee |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-227978 |
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