Abstract
HD 10009 is a spectroscopic and speckle interferometric binary with almost identical solar-type components. It was studied via speckle interferometry using the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and had its spectrophotometry performed in the 3500–9600 Å wavelength interval with the 2-m telescope of the Terskol Branch of the Institute of Astronomy of the Russian Academy of Sciences. A detailed analysis of the atmosphere of the primary component (component 1) of the binary yielded the abundances of some of the elements. The luminosities and temperatures of the components are found to be L 1= 2.9 L ⊙, L 2= 1.0 L ⊙ and T eff1=6017 K, T eff2=5930 K, respectively. The iron abundance is [Fe]=−0.27±0.05. Our results make it possible to assess the evolutionary status of the system. The binary is 7.9 Gyr old and the primary component is close to become a red giant, whereas the secondary component is still in the hydrogen-burning stage near the main sequence.
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Original Russian Text © Yu.Yu. Balega, V.V. Leushin, M.K. Kuznetsov, 2009, published in Astrofizicheskij Byulleten, 2009, Vol. 64, No. 3, pp. 236–246.
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Balega, Y.Y., Leushin, V.V. & Kuznetsov, M.K. Evolutionary status and chemical composition of the atmosphere of the spectroscopic and speckle interferometric binary HD 10009. Astrophys. Bull. 64, 229–238 (2009). https://doi.org/10.1134/S1990341309030031
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DOI: https://doi.org/10.1134/S1990341309030031