Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..384..226b&link_type=abstract
14th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun ASP Conference Series, Vol. 384, proceedings of the conferen
Astronomy and Astrophysics
Astronomy
2
Scientific paper
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_&sun;=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.
Aufdenberg Jason Paul
Berger David Harold
Gies Douglas R.
Henry Todd J.
McAlister Harold A.
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