Chemical Composition of the RS CVN-Type Star 29 Draconis

Barisevičius G.; Tautvaišienė G.; Berdyugina S.; Chorniy Y.; Ilyin I.

doi:10.1515/astro-2017-0419

Open Astronomy (Dec 2010)

Chemical Composition of the RS CVN-Type Star 29 Draconis

Barisevičius G.,
Tautvaišienė G.,
Berdyugina S.,
Chorniy Y.,
Ilyin I.

Affiliations

Barisevičius G.: Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, LT-01108, Lithuania
Tautvaišienė G.: Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, LT-01108, Lithuania
Berdyugina S.: Kiepenheuer Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg, Germany
Chorniy Y.: Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, LT-01108, Lithuania
Ilyin I.: Astrophysical Institute Potsdam, An der Sternwarte 16, Potsdam D-14482, Germany

DOI: https://doi.org/10.1515/astro-2017-0419
Journal volume & issue: Vol. 19, no. 3-4
pp. 157 – 167

Abstract

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Photospheric parameters and chemical composition are determined for the single-lined chromospherically active RS CVn-type star 29 Draconis (HD 160538). From the high resolution spectra obtained on the Nordic Optical Telescope, abundances of 22 chemical elements, including the key elements such as 12C, 13C, N and O, were investigated. The differential line analysis with the MARCS model atmospheres gives Teff = 4720 K, log g = 2:5, [Fe/H] = -0:20, [C/Fe] = -0:14, [N/Fe] = 0:08, [O/Fe] = -0:04, C/N = 2:40, 12C/13C = 16. The low value of the 12C/13C ratio gives a hint that extra mixing processes in low-mass chromospherically active stars may start earlier than the theory of stellar evolution predicts.

Published in Open Astronomy

ISSN: 2543-6376 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Science: Astronomy
Website: https://www.degruyter.com/view/j/astro

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