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  • Sebastian, D.University of Birmingham,Universidade do Porto,University of Porto (author)

The EBLM project - IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2022-09-12
  • Oxford University Press (OUP),2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e9247b55-e549-4f8f-81a2-25fc1d6aff83
  • https://doi.org/10.1093/mnras/stac2565DOI
  • https://research.chalmers.se/publication/536938URI
  • https://lup.lub.lu.se/record/7757ab7b-b85e-4dc0-8954-d55028f2e724URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Eclipsing binaries are important benchmark objects to test and calibrate stellar structure and evolution models. This is especially true for binaries with a fully convective M-dwarf component for which direct measurements of these stars' masses and radii are difficult using other techniques. Within the potential of M-dwarfs to be exoplanet host stars, the accuracy of theoretical predictions of their radius and effective temperature as a function of their mass is an active topic of discussion. Not only the parameters of transiting exoplanets but also the success of future atmospheric characterization relies on accurate theoretical predictions. We present the analysis of five eclipsing binaries with low-mass stellar companions out of a subsample of 23, for which we obtained ultra-high-precision light curves using the CHEOPS satellite. The observation of their primary and secondary eclipses are combined with spectroscopic measurements to precisely model the primary parameters and derive the M-dwarfs mass, radius, surface gravity, and effective temperature estimates using the PYCHEOPS data analysis software. Combining these results to the same set of parameters derived from TESS light curves, we find very good agreement (better than 1 percent for radius and better than 0.2 percent for surface gravity). We also analyse the importance of precise orbits from radial velocity measurements and find them to be crucial to derive M-dwarf radii in a regime below 5 percent accuracy. These results add five valuable data points to the mass-radius diagram of fully convective M-dwarfs.

Subject headings and genre

  • NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
  • NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
  • techniques: spectroscopic
  • stars: fundamental parameters
  • binaries: eclipsing
  • stars: low-mass
  • techniques: photometric
  • binaries: eclipsing
  • stars: fundamental parameters
  • stars: low-mass
  • techniques: photometric
  • techniques: spectroscopic
  • Extrasolar planets
  • Gravitation
  • Parameter estimation
  • Spectroscopic analysis
  • Stars
  • Temperature
  • Binaries:eclipsing
  • Eclipsing binaries
  • Effective temperature
  • Exo-planets
  • Light curves
  • Stars: low mass
  • Stars:fundamental parameters
  • Surface gravity
  • Techniques: photometric
  • Techniques: spectroscopic
  • Orbits

Added entries (persons, corporate bodies, meetings, titles ...)

  • Swayne, M. I.Keele University (author)
  • Maxted, P. F. L.Keele University,Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences,Université de Genève,University of Geneva (author)
  • Triaud, AmauryUniversity of Birmingham (author)
  • Sousa, S. G.Universidade do Porto,University of Porto,The University of Warwick,Istituto nazionale di astrofisica (INAF) (author)
  • Olofsson, G.Stockholms universitet,Stockholm University (author)
  • Davies, M.B.Lund University,Lunds universitet,Matematik (naturvetenskapliga fakulteten),Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematics (Faculty of Sciences),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH,Université de Genève,University of Geneva,Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Istituto nazionale di astrofisica (INAF)(Swepub:lu)astr-mda (author)
  • Billot, N.Université de Genève,University of Geneva (author)
  • Hoyer, S.Aix-Marseille Université,Aix Marseille University (author)
  • Gill, S.The University of Warwick (author)
  • Heidari, N.Aix-Marseille Université,Aix Marseille University (author)
  • Martin, D. V.Ohio State University,Aix-Marseille Université,Aix Marseille University (author)
  • Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
  • Standing, M. R.University of Birmingham,Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
  • Alibert, Y.Universität Bern,University of Bern (author)
  • Alonso, R.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Anglada, G.Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
  • Asquier, J.European Space Agency (ESA) (author)
  • Barczy, T. (author)
  • Barrado, D.Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Universität Bern,University of Bern (author)
  • Barros, S.C.C.Universidade do Porto,University of Porto,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Battley, M. P.The University of Warwick (author)
  • Baumjohann, W.Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences (author)
  • Beck, T.Universität Bern,University of Bern (author)
  • Benz, W.Universität Bern,University of Bern (author)
  • Bergomi, M.Istituto nazionale di astrofisica (INAF) (author)
  • Boisse, I.Aix-Marseille Université,Aix Marseille University (author)
  • Bonfils, X.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Brandeker, A.Stockholms universitet,Stockholm University (author)
  • Broeg, C.Universität Bern,University of Bern (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Charnoz, S.Universidade do Porto,University of Porto (author)
  • Cameron, A. CollierUniversity of St Andrews (author)
  • Csizmadia, SzDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Davies, M. B.Lunds universitet,Lund University (author)
  • Deleuil, M.Aix-Marseille Université,Aix Marseille University (author)
  • Delrez, L.Universite de Liège,University of Liège (author)
  • Demangeon, O. D. S.Universidade do Porto,University of Porto,Université de Genève,University of Geneva (author)
  • Demory, B-OUniversität Bern,University of Bern (author)
  • Dransfield, G.University of Birmingham,Universita degli Studi di Torino,University of Turin (author)
  • Ehrenreich, D.Université de Genève,University of Geneva (author)
  • Erikson, A.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Universität Bern,University of Bern (author)
  • Fortier, A.Universität Bern,University of Bern,Université de Genève,University of Geneva (author)
  • Fossati, L.Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Gillon, M.Universite de Liège,University of Liège (author)
  • Guedel, M.Universität Wien,University of Vienna (author)
  • Hasiba, J.Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences (author)
  • Hebrard, G. (author)
  • Heng, K.The University of Warwick,Universität Bern,University of Bern (author)
  • Isaak, K. G.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Kiss, L. L.Eötvös Loránd University (ELTE),Konkoly Observatory (author)
  • Kopp, E.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Kunovac, V.University of Birmingham (author)
  • Laskar, J.Sorbonne Université,Sorbonne University (author)
  • des Etangs, A. Lecavelier (author)
  • Lendl, M.Université de Genève,University of Geneva (author)
  • Lovis, C.Université de Genève,University of Geneva (author)
  • Magrin, D.Istituto nazionale di astrofisica (INAF) (author)
  • McCormac, J.The University of Warwick (author)
  • Miller, N. J.Keele University (author)
  • Nascimbeni, V.Istituto nazionale di astrofisica (INAF) (author)
  • Ottensamer, R.Universität Wien,University of Vienna (author)
  • Pagano, I.Istituto nazionale di astrofisica (INAF) (author)
  • Palle, E.Instituto de Astrofísica de Canarias (author)
  • Pepe, F. A.Université de Genève,University of Geneva (author)
  • Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Piotto, G.Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Pollacco, D.The University of Warwick (author)
  • Queloz, D.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),University Of Cambridge (author)
  • Ragazzoni, R.Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
  • Rando, N.European Space Agency (ESA) (author)
  • Rauer, H.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Eötvös Loránd University (ELTE),Freie Universität Berlin (author)
  • Ribas, I.Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
  • Lalitha, S.University of Birmingham (author)
  • Santerne, A.Aix-Marseille Université,Aix Marseille University,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Santos, N. C.Universidade do Porto,University of Porto (author)
  • Scandariato, G.Istituto nazionale di astrofisica (INAF) (author)
  • Segransan, D.Université de Genève,University of Geneva (author)
  • Simon, A. E.Universität Bern,University of Bern (author)
  • Smith, A. M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences (author)
  • Steller, M.Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences (author)
  • Szabo, Gy M.Eötvös Loránd University (ELTE) (author)
  • Thomas, N.Universität Bern,University of Bern (author)
  • Udry, S.Université de Genève,University of Geneva (author)
  • Van Grootel, V.Universite de Liège,University of Liège (author)
  • Walton, N. A.University Of Cambridge,University of Cambridge (author)
  • University of BirminghamUniversidade do Porto (creator_code:org_t)

Related titles

  • In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)519:3, s. 3546-35630035-87111365-2966

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Sebastian, D.
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Maxted, P. F. L.
Triaud, Amaury
Sousa, S. G.
Olofsson, G.
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Billot, N.
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Alibert, Y.
Alonso, R.
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Asquier, J.
Barczy, T.
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Battley, M. P.
Baumjohann, W.
Beck, T.
Benz, W.
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Kopp, E.
Kunovac, V.
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