Fundamental effective temperature measurements for eclipsing binary stars - III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31
Journal article, 2022
EBLM J0113+31 is a moderately bright (V = 10.1), metal-poor ([Fe/H] approximate to-0.3) GOV star with a much fainter M dwarf companion on a wide, eccentric orbit (= 14.3 d). We have used near-infrared spectroscopy obtained with the SPIRou spectrograph to measure the semi-amplitude of the M dwarf's spectroscopic orbit, and high-precision photometry of the eclipse and transit from the CHEOPS and TESS space missions to measure the geometry of this binary system. From the combined analysis of these data together with previously published observations, we obtain the following model-independent masses and radii: M-1 = 1.029 +/- 0.025 M-circle dot, M-2 = 0.197 +/- 0.003 M-circle dot, R-1 = 1.417 +/- 0.014 R-circle dot, R-2 = 0.215 +/- 0.002 R-circle dot. Using R-1 and the parallax from Gaia EDR3 we find that this star's angular diameter is theta = 0.0745 +/- 0.0007 mas. The apparent bolometric flux of the GOV star corrected for both extinction and the contribution from the M dwarf (<0.2 per cent) is F-circle plus,F-0 = (2.62 +/- 0.05) x 10(-9) erg cm(-2) S-1. Hence, this G0V star has an effective temperature T-eff(,1) = 6124 K +/- 40 K (rnd.) +/- 10 K (sys.). EBLM J0113+31 is an ideal benchmark star that can be used for 'end-to-end' tests of the stellar parameters measured by large-scale spectroscopic surveys, or stellar parameters derived from asteroseismology with PLATO. The techniques developed here can be applied to many other eclipsing binaries in order to create a network of such benchmark stars.
techniques: spectroscopic
stars: fundamental parameters
stars: solar-type
binaries: eclipsing
Author
P. F. L. Maxted
Keele University
N. J. Miller
Keele University
S. Hoyer
Aix Marseille University
V Adibekyan
University of Porto
S. G. Sousa
University of Porto
N. Billot
University of Geneva
A. Fortier
University of Bern
A. E. Simon
University of Bern
A. Collier Cameron
University of St Andrews
Swayne
Keele University
P. Gutermann
Institut National des Sciences de l'Univers
Aix Marseille University
Amaury Triaud
University of Birmingham
J. Southworth
Keele University
Y. Alibert
University of Bern
R. Alonso
Instituto de Astrofísica de Canarias
University of La Laguna
G. Anglada
Spanish National Research Council (CSIC)
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
T. Barczy
Admatis
D. Barrado Navascues
Spanish National Research Council (CSIC)
S. C. Barros
University of Porto
M. Beck
University of Geneva
T. Beck
University of Bern
W. Benz
University of Bern
X. Bonfils
Grenoble Alpes University
A. Brandeker
Stockholm University
C. Broeg
University of Bern
M. Buder
German Aerospace Center (DLR)
J. Cabrera
German Aerospace Center (DLR)
S. Charnoz
Paris Descartes University
C. Corral van Damme
European Space Agency (ESA)
Sz Csizmadia
German Aerospace Center (DLR)
M. B. Davies
Lund University
M. Deleuil
Aix Marseille University
L. Delrez
University of Liège
O. Demangeon
University of Porto
B-O Demory
University of Bern
D. Ehrenreich
University of Geneva
A. Erikson
German Aerospace Center (DLR)
L. Fossati
Austrian Academy of Sciences
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
D. Gandolfi
University of Turin
M. Gillon
University of Liège
M. Gudel
University of Vienna
K. Heng
University of Bern
The University of Warwick
J. E. Hernandez Leon
Airbus Group
K. G. Isaak
European Space Agency (ESA)
L. L. Kiss
Eötvös Loránd University (ELTE)
Konkoly Observatory
J. Laskar
Sorbonne University
A. Lecavelier des Etangs
Sorbonne University
M. Lendl
University of Geneva
C. Lovis
University of Geneva
D. Magrin
Istituto nazionale di astrofisica (INAF)
M. Munari
Istituto nazionale di astrofisica (INAF)
V Nascimbeni
Istituto nazionale di astrofisica (INAF)
G. Olofsson
Stockholm University
R. Ottensamer
University of Vienna
I Pagano
Istituto nazionale di astrofisica (INAF)
E. Palle
Instituto de Astrofísica de Canarias
G. Peter
German Aerospace Center (DLR)
G. Piotto
University of Padua
Istituto nazionale di astrofisica (INAF)
D. Pollacco
The University of Warwick
D. Queloz
Swiss Federal Institute of Technology in Zürich (ETH)
University of Cambridge
R. Ragazzoni
Istituto nazionale di astrofisica (INAF)
University of Padua
N. Rando
European Space Agency (ESA)
H. Rauer
Technische Universität Berlin
German Aerospace Center (DLR)
Freie Universität Berlin
I Ribas
Spanish National Research Council (CSIC)
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
N. C. Santos
University of Porto
G. Scandariato
Istituto nazionale di astrofisica (INAF)
D. Segransan
University of Geneva
A. M. S. Smith
German Aerospace Center (DLR)
M. Steinberger
Austrian Academy of Sciences
M. Steller
Austrian Academy of Sciences
Gy M. Szabo
Eötvös Loránd University (ELTE)
Sorbonne University
N. Thomas
University of Bern
S. Udry
University of Geneva
V. Van Grootel
University of Liège
N. Walton
University of Cambridge
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 513 4 6042-6057Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Geophysics
Probability Theory and Statistics
DOI
10.1093/mnras/stac1270