Magnetic stars with wide depressions in the continuum. 2. The silicon star with a complex field structure HD 27404 |
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| Authors: | E A Semenko I I Romanyuk E S Semenova A V Moiseeva D O Kudryavtsev I A Yakunin |
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| Institution: | 1.Special Astrophysical Observatory,Russian Academy of Sciences,Nizhnii Arkhyz,Russia;2.Kazan (Volga region) Federal University,Kazan,Russia |
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| Abstract: | Observations of the chemically peculiar star HD 27404 with the 6-m SAO RAS telescope showed a strong magnetic field with the longitudinal field component varying in a complicated way in the range of ?2.5 to 1 kG. Fundamental parameters of the star (Teff = 11 300 K, log g = 3.9) were estimated analyzing photometric indices in the Geneva and in the Stro¨ mgren–Crawford photometric systems. We detected weak radial velocity variations which can be due to the presence of a close star companion or chemical spots in the photosphere. Rapid estimation of the key chemical element abundance allows us to refer HD 27404 to a SiCr or Si+ chemically peculiar A0–B9 star. |
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