Revised Temperatures For Two Benchmark M-dwarfs -- Outliers No More

Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing binaries from Kepler/K2: KIC 1571511AB and HD 24465AB. Both have temperatures reported to be hotter or colder by approximately 1000 K in comparis...

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Main Authors Martin, David V, Armitage, Tayt, Duck, Alison, Swayne, Matthew I, Martínez, Romy Rodríguez, Sethi, Ritika, Gaudi, B. Scott, Gill, Sam, Sebastian, Daniel, Maxted, Pierre F. L
Format Journal Article
LanguageEnglish
Published 22.08.2022
Subjects
Physics - Earth and Planetary Astrophysics
Physics - Solar and Stellar Astrophysics
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Abstract Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing binaries from Kepler/K2: KIC 1571511AB and HD 24465AB. Both have temperatures reported to be hotter or colder by approximately 1000 K in comparison with both models and the majority of the literature. By modelling the secondary eclipses with both the original data and new data from TESS we derive significantly different temperatures which are not outliers. Removing this discrepancy allows these M-dwarfs to be truly benchmarks. Our work also provides relief to stellar modellers. We encourage more measurements of M-dwarf effective temperatures with robust methods.
AbstractList Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing binaries from Kepler/K2: KIC 1571511AB and HD 24465AB. Both have temperatures reported to be hotter or colder by approximately 1000 K in comparison with both models and the majority of the literature. By modelling the secondary eclipses with both the original data and new data from TESS we derive significantly different temperatures which are not outliers. Removing this discrepancy allows these M-dwarfs to be truly benchmarks. Our work also provides relief to stellar modellers. We encourage more measurements of M-dwarf effective temperatures with robust methods.
Author Duck, Alison
Gaudi, B. Scott
Maxted, Pierre F. L
Swayne, Matthew I
Gill, Sam
Martin, David V
Armitage, Tayt
Sethi, Ritika
Sebastian, Daniel
Martínez, Romy Rodríguez
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BackLink https://doi.org/10.48550/arXiv.2208.10510$$DView paper in arXiv
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Snippet Well-characterised M-dwarfs are rare, particularly with respect to effective temperature. In this letter we re-analyse two benchmark M-dwarfs in eclipsing...
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SubjectTerms Physics - Earth and Planetary Astrophysics
Physics - Solar and Stellar Astrophysics
Title Revised Temperatures For Two Benchmark M-dwarfs -- Outliers No More
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