The EBLM project - IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves
Artikel i vetenskaplig tidskrift, 2023
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.
techniques: spectroscopic
stars: fundamental parameters
binaries: eclipsing
stars: low-mass
techniques: photometric
Författare
D. Sebastian
University of Birmingham
M. I. Swayne
Keele University
P. F. L. Maxted
Keele University
Amaury Triaud
University of Birmingham
S. G. Sousa
Universidade do Porto
G. Olofsson
Stockholms universitet
M. Beck
Université de Genève
N. Billot
Université de Genève
S. Hoyer
Aix-Marseille Université
S. Gill
The University of Warwick
N. Heidari
Aix-Marseille Université
D. V. Martin
Ohio State University
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
M. R. Standing
University of Birmingham
Y. Alibert
Universität Bern
R. Alonso
Universidad de la Laguna
Instituto de Astrofísica de Canarias
G. Anglada
Consejo Superior de Investigaciones Científicas (CSIC)
Institut d'Estudis Espacials de Catalunya (IEEC)
J. Asquier
Europeiska rymdorganisationen (ESA)
T. Barczy
Admatis
D. Barrado
Consejo Superior de Investigaciones Científicas (CSIC)
S.C.C. Barros
Universidade do Porto
M. P. Battley
The University of Warwick
W. Baumjohann
Österreichische Akademie der Wissenschaften
T. Beck
Universität Bern
W. Benz
Universität Bern
M. Bergomi
Istituto nazionale di astrofisica (INAF)
I. Boisse
Aix-Marseille Université
X. Bonfils
Université Grenoble Alpes
A. Brandeker
Stockholms universitet
C. Broeg
Universität Bern
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Charnoz
Université Paris Descartes
A. Collier Cameron
University of St Andrews
Sz Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
M. B. Davies
Lunds universitet
M. Deleuil
Aix-Marseille Université
L. Delrez
Universite de Liège
O. D. S. Demangeon
Universidade do Porto
B-O Demory
Universität Bern
G. Dransfield
University of Birmingham
D. Ehrenreich
Université de Genève
A. Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Fortier
Universität Bern
L. Fossati
Österreichische Akademie der Wissenschaften
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
D. Gandolfi
Universita degli Studi di Torino
M. Gillon
Universite de Liège
M. Guedel
Universität Wien
J. Hasiba
Österreichische Akademie der Wissenschaften
G. Hebrard
Université Pierre et Marie Curie (UPMC)
K. Heng
The University of Warwick
Universität Bern
K. G. Isaak
European Space Research and Technology Centre (ESA ESTEC)
L. L. Kiss
Eötvös Loránd University (ELTE)
Konkoly Observatory
E. Kopp
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
V. Kunovac
University of Birmingham
Lowell Observatory
J. Laskar
Sorbonne Université
A. Lecavelier des Etangs
Université Pierre et Marie Curie (UPMC)
M. Lendl
Université de Genève
C. Lovis
Université de Genève
D. Magrin
Istituto nazionale di astrofisica (INAF)
J. McCormac
The University of Warwick
N. J. Miller
Keele University
V. Nascimbeni
Istituto nazionale di astrofisica (INAF)
R. Ottensamer
Universität Wien
I. Pagano
Istituto nazionale di astrofisica (INAF)
E. Palle
Instituto de Astrofísica de Canarias
F. A. Pepe
Université de Genève
G. Peter
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
G. Piotto
Università di Padova
Istituto nazionale di astrofisica (INAF)
D. Pollacco
The University of Warwick
D. Queloz
Eidgenössische Technische Hochschule Zürich (ETH)
University of Cambridge
R. Ragazzoni
Istituto nazionale di astrofisica (INAF)
Università di Padova
N. Rando
Europeiska rymdorganisationen (ESA)
H. Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Eötvös Loránd University (ELTE)
Freie Universität Berlin
I. Ribas
Consejo Superior de Investigaciones Científicas (CSIC)
Institut d'Estudis Espacials de Catalunya (IEEC)
S. Lalitha
University of Birmingham
A. Santerne
Aix-Marseille Université
N. C. Santos
Universidade do Porto
G. Scandariato
Istituto nazionale di astrofisica (INAF)
D. Segransan
Université de Genève
A. E. Simon
Universität Bern
A. M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
M. Steller
Österreichische Akademie der Wissenschaften
Gy M. Szabo
Eötvös Loránd University (ELTE)
N. Thomas
Universität Bern
S. Udry
Université de Genève
V. Van Grootel
Universite de Liège
N. A. Walton
University of Cambridge
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 519 3 3546-3563Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/stac2565