Revised temperatures for two benchmark M-dwarfs – outliers no more

ABSTRACT Well-characterized 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 $\approx 1000$ K in comparison with both models and the majority of other M-dwarfs in the literature. By modelling the secondary eclipses with both the original data and new data from TESS, we derive significantly different temperatures: $2865\pm 27$ for KIC 1571511B and $3081\pm 32$ for HD 24465B from the Transiting Exoplanet Survey Satellite (TESS) and $3114\pm 32$ K for HD 24465B from K2. These new temperatures 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.

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Publication Details

Journal
Monthly Notices of the Royal Astronomical Society
Published
2024-10-21
DOI
https://doi.org/10.1093/mnras/stae2266
Citations
2
Primary Topic
Advanced Statistical Methods and Models
Type
article
Field-Weighted Citation Impact
1.42

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article

Revised temperatures for two benchmark M-dwarfs – outliers no more

Romy Rodríguez Martínez, P. F. L. Maxted, Daniel Sebastian, David V. Martin et al.
2 citations
Monthly Notices of the Royal Astronomical Society
Advanced Statistical Methods and Models
1.42
article

Revised temperatures for two benchmark M-dwarfs – outliers no more

Romy Rodríguez Martínez, P. F. L. Maxted, Daniel Sebastian, David V. Martin, Samuel Gill, Tayt Armitage, Alison Duck, Keivan G. Stassun, B. Scott Gaudi, M I Swayne, Ritika Sethi
article en
2 citations

Abstract

ABSTRACT Well-characterized 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 $\approx 1000$ K in comparison with both models and the majority of other M-dwarfs in the literature. By modelling the secondary eclipses with both the original data and new data from TESS, we derive significantly different temperatures: $2865\pm 27$ for KIC 1571511B and $3081\pm 32$ for HD 24465B from the Transiting Exoplanet Survey Satellite (TESS) and $3114\pm 32$ K for HD 24465B from K2. These new temperatures 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.

Monthly Notices of the Royal Astronomical SocietyVol. 535(4)
Tufts University (US), University of Wisconsin–Madison (US), Vanderbilt University (US), University of Warwick (GB), Indian Institute of Science Education and Research Berhampur (IN), Center for Astrophysics Harvard & Smithsonian (US), The Ohio State University (US), Keele University (GB), Massachusetts Institute of Technology (US), University of Glasgow (GB), University of Birmingham (GB)
National Aeronautics and Space Administration, Space Telescope Science Institute
Openalex Percentile: Top 17%
Advanced Statistical Methods and Models
1.42
DOIOpen Access PDFOpenAlex
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