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Title: The EBLM project – VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves

Journal Article · · Monthly Notices of the Royal Astronomical Society
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  1. Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
  2. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
  3. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal
  4. Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, CH-3012 Bern, Switzerland, Center for Space and Habitability, Gesellsschaftstrasse 6, CH-3012 Bern, Switzerland
  5. Department of Astronomy, Stockholm University, AlbaNova University Center, SE-10691 Stockholm, Sweden
  6. Aix Marseille Univ, CNRS, CNES, LAM, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France, Division Technique INSU, BP 330, F-83507 La Seyne cedex, France
  7. Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, CH-3012 Bern, Switzerland
  8. Aix Marseille Univ, CNRS, CNES, LAM, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
  9. Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
  10. Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA
  11. Observatoire Astronomique de l’Université de Genève, Chemin Pegasi 51, 1290 Versoix, Switzerland
  12. Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium
  13. Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
  14. Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
  15. Institut de Ciències de l’Espai (ICE, CSIC), Campus UAB, Can Magrans s/n, E-08193 Bellaterra, Spain, Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
  16. ESTEC, European Space Agency, NL-2201AZ Noordwijk, the Netherlands
  17. Admatis, 5. Kandó Kálmán Street, 3534 Miskok, Hungary
  18. Depto. de Astrofísica, Centro de Astrobiologia (CSIC-INTA), ESAC campus, E-28692 Villanueva de la Cãda (Madrid), Spain
  19. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal
  20. Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK, Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
  21. Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
  22. Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, D-12489 Berlin, Germany
  23. Université de Paris, Institut de physique du globe de Paris, CNRS, F-75005 Paris, France
  24. Lund Observatory, Dept. of Astronomy and Theoretical Physics, Lund University, Box 43, SE-22100 Lund, Sweden
  25. Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium, Astrobiology Research Unit, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium
  26. Center for Space and Habitability, Gesellsschaftstrasse 6, CH-3012 Bern, Switzerland
  27. Leiden Observatory, University of Leiden, PO Box 9513, NL-2300 RA Leiden, the Netherlands, Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-43992 Onsala, Sweden
  28. Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, Italy
  29. Astrobiology Research Unit, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium
  30. Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, A-1180 Vienna, Austria
  31. Institut d’astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis blvd. Arago, F-75014 Paris, France, Observatoire de Haute-Provence, CNRS, Université d’Aix-Marseille, F-04870 Saint-Michel l’Observatoire, France
  32. Aix Marseille Univ, CNRS, CNES, LAM, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France, Department of Physics, Shahid Beheshti University, Tehran 1983969411, Iran, Laboratoire J.-L. Lagrange, Observatoire de la Côte d’Azur (OCA), Universite de Nice-Sophia Antipolis (UNS), CNRS, Campus Valrose, F-06108 Nice Cedex 2, France
  33. Center for Space and Habitability, Gesellsschaftstrasse 6, CH-3012 Bern, Switzerland, Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
  34. Millennium Institute for Astrophysics, Casilla 36-D, Santiago, Chile, Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile
  35. Science and Operations Department - Science Division (SCI-SC), Directorate of Science, European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, NL-2201-AZ Noordwijk, the Netherlands
  36. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, 1121 Budapest, Konkoly Thege Miklós út 15-17, Hungary, ELTE Eötvös Loránd University, Institute of Physics, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary, Sydney Institute for Astronomy, School of Physics A29, University of Sydney, NSW 2006, Australia
  37. IMCCE, UMR8028 CNRS, Observatoire de Paris, PSL Univ., Sorbonne Univ., 77 av. Denfert-Rochereau, F-75014 Paris, France
  38. Institut d’astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis blvd. Arago, F-75014 Paris, France
  39. INAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy
  40. Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
  41. INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, I-95123 Catania, Italy
  42. Institute of Optical Sensor Systems, German Aerospace Center (DLR), Rutherfordstrasse 2, D-12489 Berlin, Germany
  43. INAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy, Dipartimento di Fisica e Astronomia ‘Galileo Galilei’, Università degli Studi di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy
  44. Observatoire Astronomique de l’Université de Genève, Chemin Pegasi 51, 1290 Versoix, Switzerland, Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK
  45. Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, D-12489 Berlin, Germany, Center for Astronomy and Astrophysics, Technical University Berlin, Hardenberstrasse 36, D-10623 Berlin, Germany, Institut für Geologische Wissenschaften, Freie Universität Berlin, D-12249 Berlin, Germany
  46. ELTE Eötvös Loránd University, Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112, Hungary, MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary
  47. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
+ Show Author Affiliations

ABSTRACT The accuracy of theoretical mass, radius, and effective temperature values for M-dwarf stars is an active topic of debate. Differences between observed and theoretical values have raised the possibility that current theoretical stellar structure and evolution models are inaccurate towards the low-mass end of the main sequence. To explore this issue, we use the CHEOPS satellite to obtain high-precision light curves of eclipsing binaries with low-mass stellar companions. We use these light curves combined with the spectroscopic orbit for the solar-type companion to measure the mass, radius, and effective temperature of the M-dwarf star. Here, we present the analysis of three eclipsing binaries. We use the pycheops data analysis software to fit the observed transit and eclipse events of each system. Two of our systems were also observed by the TESS satellite – we similarly analyse these light curves for comparison. We find consistent results between CHEOPS and TESS, presenting three stellar radii and two stellar effective temperature values of low-mass stellar objects. These initial results from our on-going observing programme with CHEOPS show that we can expect to have ∼24 new mass, radius, and effective temperature measurements for very low-mass stars within the next few years.

Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Fuel Cycle and Supply Chain
OSTI ID:
1806225
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 506; ISSN 0035-8711
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (65)

Accurate masses and radii of normal stars: modern results and applications journal October 2009
Masses and Radii of Low-Mass Stars: Theory Versus Observations journal August 2006
CLÉS, Code Liégeois d’Évolution Stellaire journal November 2007
The CHEOPS mission journal November 2020
Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1 journal February 2017
How stellar activity affects the size estimates of extrasolar planets journal August 2009
A new extensive library of PHOENIX stellar atmospheres and synthetic spectra journal April 2013
The EBLM project: I. Physical and orbital parameters, including spin-orbit angles, of two low-mass eclipsing binaries on opposite sides of the brown dwarf limit journal December 2012
SOPHIE+: First results of an octagonal-section fiber for high-precision radial velocity measurements journal December 2012
SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs: I. New atmospheric parameters and masses for 48 stars with planets⋆⋆⋆ journal August 2013
Effect of stellar spots on high-precision transit light-curve journal July 2013
The Stagger-grid: A grid of 3D stellar atmosphere models: IV. Limb darkening coefficients⋆ journal December 2014
The EBLM project: II. A very hot, low-mass M dwarf in an eccentric and long-period, eclipsing binary system from the SuperWASP Survey⋆ journal November 2014
Revised age for CM Draconis and WD 1633+572: Toward a resolution of model-observation radius discrepancies journal November 2014
Revising the ages of planet-hosting stars journal February 2015
ARES v2: new features and improved performance journal May 2015
New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit journal April 2015
The SOPHIE search for northern extrasolar planets: VII. A warm Neptune orbiting HD 164595⋆⋆⋆ journal August 2015
Age consistency between exoplanet hosts and field stars journal December 2015
ellc: A fast, flexible light curve model for detached eclipsing binary stars and transiting exoplanets journal June 2016
The EBLM Project: IV. Spectroscopic orbits of over 100 eclipsing M dwarfs masquerading as transiting hot Jupiters⋆⋆⋆ journal December 2017
Comparison of the power-2 limb-darkening law from the STAGGER-grid to Kepler light curves of transiting exoplanets journal August 2018
Gaia Data Release 2 : Summary of the contents and survey properties journal August 2018
The EBLM project: VI. Mass and radius of five low-mass stars in F+M binaries discovered by the WASP survey journal June 2019
The BEBOP radial-velocity survey for circumbinary planets: I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets journal April 2019
The EBLM Project: V. Physical properties of ten fully convective, very-low-mass stars journal May 2019
qpower2: A fast and accurate algorithm for the computation of exoplanet transit light curves with the power-2 limb-darkening law journal January 2019
Expected performances of the Characterising Exoplanet Satellite (CHEOPS): III. Data reduction pipeline: architecture and simulated performances journal March 2020
Reinvestigating α Centauri AB in light of asteroseismic forward and inverse methods journal January 2021
The SOPHIE search for northern extrasolar planets: XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain journal April 2020
CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii journal February 2021
A new code for automatic determination of equivalent widths: Automatic Routine for line Equivalent widths in stellar Spectra (ARES) journal April 2007
Evolution of low-mass star and brown dwarf eclipsing binaries journal August 2007
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program: Stellar [Fe/H] and the frequency of exo-Neptunes journal June 2008
ELODIE: A spectrograph for accurate radial velocity measurements journal October 1996
The Two Micron All Sky Survey (2MASS) journal February 2006
First Results from the CHARA Array. IV. The Interferometric Radii of Low‐Mass Stars journal June 2006
The WASP Project and the SuperWASP Cameras
  • Pollacco, D. L.; Skillen, I.; Cameron, A. Collier
  • Publications of the Astronomical Society of the Pacific, Vol. 118, Issue 848 https://doi.org/10.1086/508556
journal October 2006
The Dartmouth Stellar Evolution Database journal September 2008
emcee : The MCMC Hammer
  • Foreman-Mackey, Daniel; Hogg, David W.; Lang, Dustin
  • Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925 https://doi.org/10.1086/670067
journal March 2013
The Wide-Field Infrared Survey Explorer (Wise): Mission Description and Initial On-Orbit Performance journal November 2010
HATS-6b: A WARM SATURN TRANSITING AN EARLY M DWARF STAR, AND A SET OF EMPIRICAL RELATIONS FOR CHARACTERIZING K AND M DWARF PLANET HOSTS journal April 2015
Absolute Properties of the Low-Mass Eclipsing Binary cm Draconis journal February 2009
Lspm J1112+7626: Detection of a 41 day M-Dwarf Eclipsing Binary from the Mearth Transit Survey journal November 2011
The Radius Discrepancy in Low-Mass Stars: Single Versus Binaries journal October 2013
Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main-Sequence Stars journal September 2013
Stellar angular diameters from infrared photometry. Application to Arcturus and other stars; with effective temperatures journal September 1977
WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS journal September 2020
A highly unequal-mass eclipsing M-dwarf binary in the WFCAM Transit Survey journal April 2013
The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations journal May 2013
Theoretical uncertainties on the radius of low- and very-low-mass stars journal January 2018
The scatter of the M dwarf mass–radius relationship journal August 2018
The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 – no evidence for a very hot M-dwarf companion journal July 2020
M dwarfs: effective temperatures, radii and metallicities journal September 2008
A method for the direct determination of the surface gravities of transiting extrasolar planets journal July 2007
Transiting Exoplanet Survey Satellite journal October 2014
CARMENES instrument overview conference July 2014
The TESS science processing operations center conference August 2016
The SOPHIE spectrograph: design and technical key-points for high throughput and high stability conference August 2008
Fast and Scalable Gaussian Process Modeling with Applications to Astronomical Time Series journal November 2017
Magnetic Inflation and Stellar Mass. II. On the Radii of Single, Rapidly Rotating, Fully Convective M-Dwarf Stars journal May 2018
A NEW GENERATION OF PARSEC - COLIBRI STELLAR ISOCHRONES INCLUDING THE TP-AGB PHASE journal January 2017
New Low-mass Eclipsing Binary Systems in Praesepe Discovered by K 2 journal October 2017
Stellar Parameters for Trappist-1 journal January 2018
Evolutionary Models for Ultracool Dwarfs journal July 2019

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