The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets

Pierre F. L. Maxted; Amaury H. M. J. Triaud; David V. Martin

doi:10.3390/universe9120498

The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets

Pierre F. L. Maxted^*, Amaury H. M. J. Triaud, David V. Martin

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Review article › peer-review

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Abstract

The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective temperature estimates for very-low-mass M dwarfs, and review the results of the EBLM study and those from related projects. We show that radius inflation in fully convective stars is a more subtle effect than what was previously thought based on less precise measurements, i.e., the mass–radius–effective temperature relations we observe for fully convective stars in single-line eclipsing binaries show reasonable agreement with the theoretical models, particularly if we account for the M-dwarf metallicity, as inferred from the analysis of the primary star spectrum.

Original language	English
Article number	498
Number of pages	28
Journal	Universe
Volume	9
Issue number	12
DOIs	https://doi.org/10.3390/universe9120498
Publication status	Published - 29 Nov 2023

Bibliographical note

Funding:
P.F.L.M. was funded by the Science and Technology Facilities Council (STFC), grant numbers ST/S001301/1 and ST/R000638/1. AHMJT is supported from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement n° 803193/BEBOP). The EBLM project has received generous funding and observing time allocations from NASA through TESS Guest Investigator Programs G05024, G04157, and G022253 (PI Martin).

Keywords

eclipsing binary stars
exoplanets
fundamental properties of stars
very-low-mass stars

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MaxtedP2023EBLMFinal published version, 0.98 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets",

abstract = "The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective temperature estimates for very-low-mass M dwarfs, and review the results of the EBLM study and those from related projects. We show that radius inflation in fully convective stars is a more subtle effect than what was previously thought based on less precise measurements, i.e., the mass–radius–effective temperature relations we observe for fully convective stars in single-line eclipsing binaries show reasonable agreement with the theoretical models, particularly if we account for the M-dwarf metallicity, as inferred from the analysis of the primary star spectrum.",

keywords = "eclipsing binary stars, exoplanets, fundamental properties of stars, very-low-mass stars",

author = "Maxted, {Pierre F. L.} and Triaud, {Amaury H. M. J.} and Martin, {David V.}",

note = "Funding: P.F.L.M. was funded by the Science and Technology Facilities Council (STFC), grant numbers ST/S001301/1 and ST/R000638/1. AHMJT is supported from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement n° 803193/BEBOP). The EBLM project has received generous funding and observing time allocations from NASA through TESS Guest Investigator Programs G05024, G04157, and G022253 (PI Martin). ",

year = "2023",

month = nov,

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doi = "10.3390/universe9120498",

language = "English",

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journal = "Universe",

issn = "2218-1997",

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AU - Maxted, Pierre F. L.

AU - Triaud, Amaury H. M. J.

AU - Martin, David V.

N1 - Funding: P.F.L.M. was funded by the Science and Technology Facilities Council (STFC), grant numbers ST/S001301/1 and ST/R000638/1. AHMJT is supported from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement n° 803193/BEBOP). The EBLM project has received generous funding and observing time allocations from NASA through TESS Guest Investigator Programs G05024, G04157, and G022253 (PI Martin).

PY - 2023/11/29

Y1 - 2023/11/29

N2 - The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective temperature estimates for very-low-mass M dwarfs, and review the results of the EBLM study and those from related projects. We show that radius inflation in fully convective stars is a more subtle effect than what was previously thought based on less precise measurements, i.e., the mass–radius–effective temperature relations we observe for fully convective stars in single-line eclipsing binaries show reasonable agreement with the theoretical models, particularly if we account for the M-dwarf metallicity, as inferred from the analysis of the primary star spectrum.

AB - The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective temperature estimates for very-low-mass M dwarfs, and review the results of the EBLM study and those from related projects. We show that radius inflation in fully convective stars is a more subtle effect than what was previously thought based on less precise measurements, i.e., the mass–radius–effective temperature relations we observe for fully convective stars in single-line eclipsing binaries show reasonable agreement with the theoretical models, particularly if we account for the M-dwarf metallicity, as inferred from the analysis of the primary star spectrum.

KW - eclipsing binary stars

KW - exoplanets

KW - fundamental properties of stars

KW - very-low-mass stars

UR - https://arxiv.org/abs/2311.16677

U2 - 10.3390/universe9120498

DO - 10.3390/universe9120498

M3 - Review article

SN - 2218-1997

VL - 9

JO - Universe

JF - Universe

IS - 12

M1 - 498

ER -

The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets

Abstract

Bibliographical note

Keywords

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Cite this