Abstract
As part of our study of the components of the hierarchic quadruple system ADS 11061, we acquired spectroscopic observations of the binary 40 Dra. Echelle spectra showing the separation of the components’ lines were obtained in the spectral range 3700–9200 Å. Effective temperatures and surface gravities were derived for the components from BV photometry and the hydrogen-line profiles. The components of the 40 Dra system have parameters close to T aeff = 6420 K, log g a = 4.17, T beff = 6300 K, and log g b = 4.20. We find the microturbulence velocity in the component atmospheres to be V t = 2.6 km/s. The abundances of iron, carbon, nitrogen, and oxygen in the atmospheres of both components are estimated to be log N(Fe)a = 7.50, log N(Fe)b = 7.46, log N(C)a = 8.39, log N(C)b = 8.45, log N(N)a = 8.12, log(N)b = 8.15, log N(O)a = 8.77, log N(O)b = 8.74.
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Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 82, No. 12, 2005, pp. 1099–1108.
Original Russian Text Copyright © 2005 by Balega, Leushin, Kuznetsov.
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Balega, Y.Y., Leushin, V.V. & Kuznetsov, M.K. Atmospheric chemical abundances of the components of the quadruple system ADS 11061. 40 Draconis. Astron. Rep. 49, 984–992 (2005). https://doi.org/10.1134/1.2139814
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DOI: https://doi.org/10.1134/1.2139814