Investigation of ρ Cas (HR 9045, HD 224014) stellar atmosphere
The atmosphere of hypergiant ρ Cas is investigated by the method of atmospheric model. Effective temperature and the surface of gravity are determined by comparing the observed and theoretical values of photometrical indices [c1];Q, and equivalent widths of Balmer lines: Teff = 5450±200K, l...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Astronomical Observatory, Department of Astronomy, Belgrade
2024-01-01
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| Series: | Serbian Astronomical Journal |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/1450-698X/2024/1450-698X2409033S.pdf |
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| Summary: | The atmosphere of hypergiant ρ Cas is investigated by the method of
atmospheric model. Effective temperature and the surface of gravity are
determined by comparing the observed and theoretical values of photometrical
indices [c1];Q, and equivalent widths of Balmer lines: Teff = 5450±200K, log
g=0:1±0:2. The microturbulence parameter is evaluated as ξt = 10±1 km/s,
based on studies of FeII lines. The chemical composition of the star is
determined. In the atmosphere of ρ Cas the C turned out to be a deficit, N,
and Na in excess, other investigated elements practically display solar
abundance. |
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| ISSN: | 1450-698X 1820-9289 |