A physically-motivated photometric calibration of M dwarf metallicity
A physically-motivated photometric calibration of M dwarf metallicity
The location of M dwarfs in the (<i>V<i/>–<i>K<i/><sub>s<sub/>)–<i>M<i/><sub><i>K<i/>s<sub/> color-magnitude diagram (CMD) has been shown to correlate with metallicity. We demonstrate that previous empirical photometric calibrations of M dwarf metallicity exploiting this correlation systematically underestimate or overestimate metallicity at the extremes of their range. We improve upon previous calibrations in three …