The temperature scale of solar-type stars.
Abstract
Effective temperatures for the atmospheres of solar-type stars have been determined by comparison of observed hydrogen lines with profiles computed from scaled solar model atmospheres. The analysis is based on more than one hundred high-dispersion spectra of 20 main sequence stars with spectral types F6 V to G5 V and calibrated directly with spectra of the sun, moon, and daylight sky. For early G-type stars the resulting spectroscopic temperature scale deviates considerably from color-temperature relations derived from synthesis of theoretical color indices using model atmospheres with statistical line distribution functions. The spectroscopic calibration yields effective temperatures for G-type stars that are about 200-300 K higher than those predicted from comparison of observed and synthesized color indices.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1981
- Bibcode:
- 1981A&A...100...97G
- Keywords:
-
- Atmospheric Models;
- G Stars;
- Main Sequence Stars;
- Spectrum Analysis;
- Stellar Atmospheres;
- Stellar Temperature;
- Abundance;
- Balmer Series;
- Calibrating;
- Sun;
- Astrophysics