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Paper: The Radius-Luminosity Relation from Near-Infrared Interferometry: New M Dwarf Sizes from the CHARA Array
Volume: 384, 14th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
Page: 226
Authors: Berger, D.H.; ten Brummelaar, T.A.; Gies, D.R.; Henry, T.J.; McAlister, H.A.; Merand, A.; Sturmann, J.; Sturmann, L.; Turner, N.H.; Aufdenberg, J.P.; Ridgway, S.T.
Abstract: We present interferometric size measurements of M dwarfs obtained with the Center for High Angular Resolution Astronomy (CHARA) Array on Mount Wilson. Observations were made in the near infrared K′-band, which yielded angular diameters less than one milliarcsecond and linear radii ranging from R/R=0.25 to 0.7. By combining our data with near-infrared photometry and parallaxes, we have produced an observer’s radius-luminosity relationship for “single” (not in eclipsing binary systems) main sequence stars smaller than our Sun. As with low-mass stars in eclipsing binary systems, we also find that many stars are 10-15% larger than predicted. We find that a dependency on metallicity may play a larger role than previously thought such that stars become significantly larger with increasing metallicity.
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