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Microturbulent Velocity in the Atmospheres of G Spectral Classes Star


Affiliations
1 Department of Astrophysics, Baku State University, Z Khalilov Str. 23, AZ 1148, Baku, Azerbaijan
2 Shamakhi Astrophysical Observatory of ANAS, AZ 2656, Shamakhi, Azerbaijan
 

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.

Keywords

Stars, Microturbulence, Fundamental Parameters, Chemical Composition.
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  • Boyarchuk AA, Lyubimkov LS, Sakhibullin NA. Effects of deviations from local thermodynamic equilibrium in the atmospheres of F supergiants. I. Overionization of Fe I atoms. Astrophysics. 1985;22:203-14.

  • Samedov ZA. Investigation of the atmosphere of HR382 (φCas, F0Ia) star. International Journal of Development Research. 2018;8:21398-400.

  • Samedov ZA, Khalilov AM. Atmosphere of 44Cyg (F5 Iab) star: Fundamental parameters, chemical composition, Reports of ANAS Phys-Tech Math. Phys Astr. 2018;5:23-8.

  • Kupka F, Piskunov N, Ryabchikova TA, et al. VALD2: Progress of the Vienna Atomic Line Data Base. Astron Astrophys Suppl Ser. 1999;138:119-33.

  • Kuli-Zade DM, Samedov ZA, Aliyeva ZF, et al. Determination of the element abundance of the Sun by the method of the model, News of Baku University. 2015;4:181-87.


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  • Microturbulent Velocity in the Atmospheres of G Spectral Classes Star

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Authors

ZA Samedov
Department of Astrophysics, Baku State University, Z Khalilov Str. 23, AZ 1148, Baku, Azerbaijan
MA Jafarov
Shamakhi Astrophysical Observatory of ANAS, AZ 2656, Shamakhi, Azerbaijan

Abstract


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.

Keywords


Stars, Microturbulence, Fundamental Parameters, Chemical Composition.

References