Abstrait

Microturbulent Velocity in the Atmospheres of G Spectral Classes Star

ZA Samedov and MA Jafarov

The microturbulence is investigated in the atmospheres of some G spectral classes stars by the atmosphere model. The microturbulent velocities are determined on the basis of comparison of the values measured from observation and theoretically calculated equivalent widths of lines FeII. It has been found that the microturbulent velocity (𝜉𝑡 ) depends on the surface gravity (g) in the atmospheres of the star: 𝜉𝑡 decreases with increasing g. The microturbulent velocity is less in the stars with intense atmosphere.