An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars

Details An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215..305a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 2, May 1989, p. 305-315.

Astronomy and Astrophysics

Astrophysics

42

Dwarf Stars, G Stars, K Stars, Stellar Color, Stellar Temperature, Subdwarf Stars, Main Sequence Stars, Metallicity, Stellar Atmospheres, Stellar Models

Scientific paper

Infrared observations are used to obtain effective temperatures with a 3-percent error for a sample of low main-sequence stars. The empirical calibration of Arribas and Martinez Roger (1988) is found to be valid except for the lowest metallicities and for effective temperatures of lower than 5000 K, and to predict exceedingly blue colors for solar abundances. Better agreement with the observed behavior is found with the Buser and Kurucz (1988) model. The results support the claim of Magain (1987) that UV opacity is larger than that predicted using current atmospheric models for late-type stars.

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