Tayf türü A- erken F aralığında olan anakol yıldızların element bolluk hesaplamaları
Özet
In this master thesis study Kurucz (1993b)'s local thermodynamic equilibrium ATLAS9 model atmospheres for 11 normal and metallic lined stars were produced. The element abundances with WIDTH9 (Kurucz 1993a) were computed. The spectral distributions investigated in this study were those of Main Sequence A - early F spectral type stars. The atmospheric chemical elemental abundance analyses of the stars were performed with spectral data (equivalent widths and broadening parameters) from the spectral series of Adelman and his collaborators (Elemental Abundance Analyses with DAO Spectrograms) (e.g., Adelman 1988, Adelman vd. 1997) by using the best available atomic data (e.g., oscillator strengths). A comparison was carried out for each star including the light elements (Mg, Si, S, Ca), iron group elements (Sc, Ti, V, Cr, Mn, Fe, Co, Ni), and rare earth group elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Er, Hf, Er, Dy) with those of literature. The elemental abundance peculiarities observed in some of them depend on the peculiar star. The abundance analyses using modified log gf values from about total 278 atomic line cards of 11 stars selected from works in 1988-1999 were performed. Statistic analyses (t_test) show that abundances obtained from the different atomic types (e.g. Si, V, Fe) agree with those of literature within p 0.05.