The visual surface brightness of K/M giants and dwarfs with near-solar metallicity differ slightly in agreement with the gravity effects predicted by recent theoretical models. We show that M-dwarfs display also a metallicity dependence of the surface brightness in the infrared K-band in agreement with theory. Based on these results, we present improved Barnes-Evans type relations and estimate the radii of 60 single or presumed M and K-dwarfs
Cite
@article{arxiv.astro-ph/9906350,
title = {Barnes--Evans relations for late--type giants and dwarfs},
author = {K. Beuermann and I. Baraffe and P. Hauschildt},
journal= {arXiv preprint arXiv:astro-ph/9906350},
year = {2011}
}
Comments
10 pages, Latex file, uses aa.cls, accepted for publication in A&A