THE RELATIONSHIP BETWEEN STELLAR VISUAL SURFACE BRIGHTNESS AND COLOR

被引:15
作者
BELL, RA [1 ]
GUSTAFSSON, B [1 ]
机构
[1] UPPSALA UNIV,ASTRON OBSERV,S-75120 UPPSALA 1,SWEDEN
基金
美国国家科学基金会;
关键词
Combined effect - Gravity effects - Metal abundances - Stellar atmospheres - Stellar spectra - Stellars - Surface brightness - Surface colors - Thermal;
D O I
10.1093/mnras/191.3.435
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Synthetic stellar spectra, computed for model stellar atmospheres for giant stars 6000 K ≥ Teff ≥ 4000 K and for a Vega model, are used to study the dependence of stellar visual surface brightness (Fv) on colour. The agreement with observational correlations for Population I stars appears to be quite satisfactory. The models show that whilst the basic relationship is a thermal one, metal abundance effects do occur in the Fv-(B-V), Fv-(V-R) and Fv-(R-I) diagrams and gravity effects occur in the Fy-(B- V) diagram. The combined effects of metal abundance and gravity are smallest in the Fv-(V-R) diagram and the relationship between Fy and (V-R) agrees very well with that found observationally by Barnes & Evans. © Royal Astronomical Society • Provided by the NASA Astrophysics Data System.
引用
收藏
页码:435 / 444
页数:10
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