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Energy Distribution, Photometry and Physical Characteristics of the Sun and Solar Analogs

Published online by Cambridge University Press:  30 March 2016

I. N. Glushneva ,
E. A. Markova  and
A. V. Kharitonov
I. N. Glushneva
Affiliation:
Sternberg Astronomical Institute
E. A. Markova
Affiliation:
Sternberg Astronomical Institute
A. V. Kharitonov
Affiliation:
Astrophysical Inst., Alma Ata

Abstract

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Color indices of solar analogs in the Vilnius seven-color photometric system are discussed. The physical parameters (effective temperatures, radii and luminosities) for solar analogs with reliable spectrophotometric and photometric data were obtained by means of infrared fluxes. The effective temperatures of 16 Cyg A and B, which are considered to be the closest solar analogs are 5854 and 5664 K, respectively. The radii of both stars are in the range of 1 Ro < R < 1.4 Ro and luminosities 1.2Lo < L < 2.1 Lo for 16 Cyg A and Lo < L < 1.7 Lo for 16 Cyg B depending on different evaluations of the distances. We find that the relative solar energy distribution in the 0.33 – 1.25 μm range determined by Neckel and Labs (1984) is reliable enough, however the absolute fluxes are slightly too low at the maximum of energy distribution.

Type
Joint Commission Meetings
Information
Highlights of Astronomy , Volume 7: Highlights of Astronomy. As presented at the XIXth General Assembly of the IAU, 1985 , 1986 , pp. 853 - 861
Copyright
Copyright © Reidel 1986

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