EFFECTIVE TEMPERATURES OF SOLAR TYPE STARS

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Abstract:

For 29 stars of G0-G5 spectral types with color indices 0.60 <$>\leq B\ndash V \le 0.68<$> and parallaxes obtained by Hipparcos satellite effective temperatures, angular diameters and radii are determined by means of the method of infrared fluxes (IRFM) on the basis of JHKLM photometry. Effective temperatures obtained by iterations in the process of combined determination of the <$>T_{\rm eff}<$> and angular diameter of star <$>(T_{1})<$> and using modification of IRFM, so-called observation R-factor, <$>(T_{2})<$> are compared. The mean differences of these two effective temperatures don't exceed 1% for all the IR bands.

For the majority of investigated stars (23 from 29) bolometric magnitudes are less than for the Sun.

The analysis of five parameters of solar-type stars investigated in this paper, such a effective temperature, bolometric magnitude, radius, metallicity and infrared color indices, shows that 18 Sco seems to be the most accetable candidate for solar "twins".

Keywords: IR photometry; Solar analogs; Stars; Stars -fundamental parameters

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790215603

Affiliations: Sternberg Astronomical Institute, Universitetskij prosp. 13, 119 899, Moscow, Russia

Publication date: January 1, 2002

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