Line-Blanketing in Theoretical Model Atmospheres for f, g, and K-Type Stars
Abstract
The authors have computed improved flux distributions from Gustafsson et al.'s (1979) extensive grids of theoretical model atmospheres for late-type (F-K) giant and dwarf stars. The massive list of atomic opacity sources used for the hotter Kurucz models was also employed in calculating the cooler spectra. For both the giant and the dwarf models, the resulting synthetic UBVRI photometry provides excellent matches to the spectroscopic calibrations of the observed metallicity and temperature scales based on the ultraviolet excesses, δ(U-B), and the BVRI colors, respectively. The authors conclude that the atomic line-blanketing accounts for the largest fraction of the systematic UV discrepancy existing between observations and earlier model calculations.
- Publication:
-
The Impact of Very High S/N Spectroscopy on Stellar Physics
- Pub Date:
- 1988
- Bibcode:
- 1988IAUS..132..531B