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.
Cite
@article{arxiv.2208.10510,
title = {Revised Temperatures For Two Benchmark M-dwarfs -- Outliers No More},
author = {David V. Martin and Tayt Armitage and Alison Duck and Matthew I. Swayne and Romy Rodríguez Martínez and Ritika Sethi and B. Scott Gaudi and Sam Gill and Daniel Sebastian and Pierre F. L. Maxted},
journal= {arXiv preprint arXiv:2208.10510},
year = {2022}
}