Abstract
We present an analysis of the spectra of the star V837 Tau, which belongs to a class of chromosphere-active RSCVn type stars. The observational material was obtained with the 1.5-m Russian-Turkish telescope RTT-150 and the 2.6-m Shajn telescope of the Crimean astrophysical observatory. To reveal signs of the photosphere spottedness of the primary and to isolate the faint secondary, we performed the deconvolution of the “averaged” spectral profile of the system. By describing the radial velocity curves, we refined the orbital elements of the binary system, and by modeling spectrawe determined the fundamental parameters of the components, as well as the chemical composition of the atmosphere of the bright component. Using the Doppler mapping method we reconstructed the distribution of spots on the surface of the bright star. We show that the spots are concentrated in a belt at medium (about 40) latitudes. The hydrogen line profiles have a variable emission feature in the bright component, and the Hα line exhibits traces of chromospheric activity in the secondary.
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Acknowledgments
The authors are grateful to TÜ BITAK, KFU, AST and Space Research Institute for partial support in using RTT-150 (the Russian-Turkish 1.5-m telescope near Antalya).
Funding
This work was supported by the Russian Foundation for Basic Research (projects 16-32-60039 and 16-02-01145). The work of Shimansky was carried out with the financial support of RFBR and the government of the Republic of Tatarstan within the framework of science project No. 18-42-160003. The work of NNS was supported by the subsidy to KFU for the state assignment in the scientific activities (3.9780.2017/8.9).
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Russian Text © The Author(s), 2019, published in Astrofizicheskii Byulleten', 2019, Vol. 74, No. 4, pp. 466–480.
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Kolbin, A.I., Shimansky, V.V., Alekseev, I.Y. et al. Analysis of the Spectroscopic Observations of RS CVn Type Star V837 Tau. Astrophys. Bull. 74, 451–463 (2019). https://doi.org/10.1134/S1990341319040114
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DOI: https://doi.org/10.1134/S1990341319040114