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Carbon and oxygen abundances in dwarf stars of the Solar neighbourhood

Published online by Cambridge University Press:  13 January 2020

G. Tautvaišienė ,
R. Minkevičiūtė ,
E. Stonkutė ,
A. Drazdauskas  and
Š. Mikolaitis
G. Tautvaišienė
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Sauletekio av. 3, 10257, Vilnius, Lithuania email: [email protected]
R. Minkevičiūtė
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Sauletekio av. 3, 10257, Vilnius, Lithuania email: [email protected]
E. Stonkutė
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Sauletekio av. 3, 10257, Vilnius, Lithuania email: [email protected]
A. Drazdauskas
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Sauletekio av. 3, 10257, Vilnius, Lithuania email: [email protected]
Š. Mikolaitis
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Sauletekio av. 3, 10257, Vilnius, Lithuania email: [email protected]
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Abstract

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Stars and planets form from the same material, thus some of their properties are expected to be inter-connected. In order to characterise exoplanets, we need to investigate the planet-hosting stars. Carbon and oxygen are quite abundant and play an important role in stellar interiors by generating energy in thermonuclear reactions. Abundances of C and O may influence water availability on exoplanets. The C/O ratio also controls an amount of carbides and silicates that can be formed. Thus, we are performing a uniform study of C/O ratios in bright stars ( V < mag) located towards the northern ecliptic pole which will be targeted by the TESS and JWST space missions. The first results for a sample of 140 stars analysed are presented.

Keywords

stars: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 265 - 266
Copyright
© International Astronomical Union 2020 

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