Dependence of Microturbulence in F Stars on Spectral Type
- 4 Downloads
Microturbulence in the atmospheres of F stars is studied using model atmospheres. The microturbulence velocity is determined by comparing calculated and observed equivalent widths of Fe II lines. The line equivalent widths were measured using the DASA code developed at the Crimean Astrophysical Observatory of the Russian Academy of Sciences. An inverse dependence of the microturbulence velocity ξt on the gravity g in the stellar atmospheres is found; i.e., ξt decreases with increasing g.
Unable to display preview. Download preview PDF.
- 4.F. Castelli and R. L. Kurucz, in Modelling of Stellar Atmospheres, Ed. by N. E. Piskunov, W. W. Weiss, and D. F. Gray, Proc. IAU Symp. 210, A20 (2003).Google Scholar
- 6.R. L. Kurucz, ATLAS9 Stellar Atmosphere Programs and 2 km/s Grid, CD-ROM 13 (Smithsonian Astrophys. Obs., Cambridge, MA, 1993).Google Scholar
- 7.L. S. Lyubimkov, Chemical Composition of Stars: Method and Analysis Results (Astroprint, Odessa, 1995) [in Russian].Google Scholar