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

Bibcode
1989A&A...215..305A
Arribas, S.; Martinez Roger, C.
Bibliographical reference

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

Advertised on:
5
1989
Number of authors
2
IAC number of authors
2
Citations
48
Refereed citations
45
Description
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.
Type
Refereed
G stars
K stars
Main sequence stars
Stellar atmospheres

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