The effective temperatures, diameters and luminosities of 22 bright stars by application of the infrared flux method.
Abstract
The infrared flux method is used to determine the effective temperatures and angular diameters of 22 bright stars of various spectral types. Their parallaxes are combined with the angular diameters to give linear radii, and with the observed integrated fluxes to give luminosities. The ratios of stellar integrated flux to infrared monochromatic flux required by the method were computed using published Kurucz (1979) model atmospheres and STARLINK generated MARCS models. These are compared to the observed values of the ratios, derived using ultraviolet and infrared data taken from the literature, and visible data obtained by the authors in Tenerife in 1982. A new absolute infrared calibration of Vega is used. With the present infrared data, the accuracy of the derived stellar effective temperatures is about 2.5 percent and of the angular diameters 6 percent, for spectral types later than A5. The accuracy rapidly becomes worse for earlier types because of the uncertainty in the ultraviolet component of the integrated fluxes. Good agreement is found with other determinations of effective temperatures and angular diameters, including those using the intensity interferometer.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1986
- Bibcode:
- 1986A&A...159..217L
- Keywords:
-
- Diameters;
- Infrared Photometry;
- Stellar Luminosity;
- Stellar Temperature;
- Accuracy;
- Atmospheric Models;
- Astrophysics