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Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31

Maxted, P F L; Miller, N J; Hoyer, S; Adibekyan, V; Sousa, S G; Billot, N; Fortier, A; Simon, A E; Collier Cameron, A; Swayne, M I; Gutermann, P; Triaud, A H M J; Southworth, J; Alibert, Y; Alonso, R; Anglada, G; Bárczy, T; Barrado Navascues, D; Barros, S C C; Baumjohann, W; Beck, M; Beck, T; Benz, W; Bonfils, X; Brandeker, A; Broeg, C; Buder, M; Cabrera, J; Charnoz, S; Corral van Damme, C; Csizmadia, Sz; Davies, M B; Deleuil, M; Delrez, L; Demangeon, O; Demory, B-O; Ehrenreich, D; Erikson, A; Fossati, L; Fridlund, M; Gandolfi, D; Gillon, M; Güdel, M; Heng, K; Hernández Leon, J E; Isaak, K G; Kiss, L L; Laskar, J; Lecavelier des Etangs, A; Lendl, M; Lovis, C; Magrin, D; Munari, M; Nascimbeni, V; Olofsson, G; Ottensamer, R; Pagano, I; Pallé, E; Peter, G; Piotto, G; Pollacco, D; Queloz, D; Ragazzoni, R; Rando, N; Rauer, H; Ribas, I; Santos, N C; Scandariato, G; Ségransan, D; Smith, A M S; Steinberger, M; Steller, M; Szabó, Gy M; Thomas, N; Udry, S; Van Grootel, V; Walton, N

Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31 Thumbnail


Authors

N J Miller

S Hoyer

V Adibekyan

S G Sousa

N Billot

A Fortier

A E Simon

A Collier Cameron

M I Swayne

P Gutermann

A H M J Triaud

Y Alibert

R Alonso

G Anglada

T Bárczy

D Barrado Navascues

S C C Barros

W Baumjohann

M Beck

T Beck

W Benz

X Bonfils

A Brandeker

C Broeg

M Buder

J Cabrera

S Charnoz

C Corral van Damme

Sz Csizmadia

M B Davies

M Deleuil

L Delrez

O Demangeon

B-O Demory

D Ehrenreich

A Erikson

L Fossati

M Fridlund

D Gandolfi

M Gillon

M Güdel

K Heng

J E Hernández Leon

K G Isaak

L L Kiss

J Laskar

A Lecavelier des Etangs

M Lendl

C Lovis

D Magrin

M Munari

V Nascimbeni

G Olofsson

R Ottensamer

I Pagano

E Pallé

G Peter

G Piotto

D Pollacco

D Queloz

R Ragazzoni

N Rando

H Rauer

I Ribas

N C Santos

G Scandariato

D Ségransan

A M S Smith

M Steinberger

M Steller

Gy M Szabó

N Thomas

S Udry

V Van Grootel

N Walton



Abstract

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.

Journal Article Type Article
Acceptance Date May 16, 2022
Online Publication Date May 16, 2022
Publication Date 2022-07
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 513
Issue 4
Pages 6042-6057
DOI https://doi.org/10.1093/mnras/stac1270
Keywords techniques: spectroscopic, binaries: eclipsing, stars: fundamental parameters, stars: solar-type
Publisher URL https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stac1270/6586346

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