Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 513, Issue 4, Pages 6042-6057Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac1270
Keywords
techniques: spectroscopic; binaries: eclipsing; stars: fundamental parameters; stars: solar-type
Categories
Funding
- NASA Explorer Program directorate
- NASA [NAS 5-26555]
- UK Science and Technology Facilities Council (STFC) [ST/M001040/1]
- STFC [ST/S505444/1, ST/T506175/1]
- Centre National d' Etudes Spatiales (CNES) [837319]
- Fundacao para a Ciencia ea Tecnologia (FCT) [CEECIND/00826/2018]
- STFC consolidated grant [ST/R000824/1, ST/V000861/1]
- UKSA [ST/R003203/1]
- Swiss National Fund [200020 172746]
- Spanish Ministry of Science and Innovation
- European Regional Development Fund [ESP2016-80435-C2-1-R, ESP2016-80435-C22-R, PG2018-098153-B-C33, PGC2018-098153-B-C31, ESP201787676-C5-1-R, MDM-2017-0737, PGC2018-098153-B-C33]
- Unidad de Excelencia Maria de Maeztu-Centro de Astrobiologia (INTA-CSIC)
- Generalitat de Catalunya/CERCA programme
- ESA [4000124370]
- FCT [IF/01312/2014/CP1215/CT0004, DL 57/2016/CP1364/CT0004]
- Swedish National Space Agency (SNSA)
- CNES
- Belgian Federal Science Policy Office (BELSPO)
- University of Liege through an ARC grant for Concerted Research Actions - Wallonia-Brussels Federation
- FCT -Fundacao para a Ciencia e a Tecnologia
- FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao [UID/FIS/04434/2019, UIDB/04434/2020, UIDP/04434/2020, PTDC/FIS-AST/32113/2017, POCI-01-0145-FEDER-032113, PTDC/FIS-AST/28953/2017, POCI-01-0145-FEDER-028953, PTDC/FIS-AST/28987/2017, POCI-01-0145-FEDER028987]
- Swiss National Science Foundation [PP00P2-190080, PCEFP2 194576]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (project FOUR ACES) [724427]
- Swiss National Science Foundation (SNSF)
- Swedish National Space Agency [DNR 65/19, 174/18]
- CRT Foundation [2018.2323]
- Region Ile de France
- project Equip@Meso of the programme Investissements d'Avenir [ANR-10-EQPX-29-01]
- Space Agency (ASI) [2013-016-R.0]
- Simons Foundation [327127]
- Hungarian National Research, Development and Innovation Office (NKFIH) [K125015]
- ELTE Eotvos Lorand University [ESA-D/SCILE-2021-0025]
- European Space Agency [ESA-D/SCILE-2021-0025]
- Hungarian Academy of Science [LP2018-7/2021]
- city of Szombathely
- STFC [ST/V000861/1] Funding Source: UKRI
Ask authors/readers for more resources
By analyzing the spectroscopic and photometric data of the binary system EBLM J0113+31, the parameters such as mass, radius, angular diameter, and effective temperature are obtained. It is found that this system can serve as an ideal benchmark star for measuring other binary systems.
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,T-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.
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