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Abundance of zirconium in the atmospheres of red giants in Galactic globular cluster 47 Tuc

Published online by Cambridge University Press:  11 March 2020

Edgaras Kolomiecas Open the ORCID record for Edgaras Kolomiecas [Opens in a new window] ,
Vidas Dobrovolskas  and
Arūnas Kučinskas
Edgaras Kolomiecas
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio av. 3, LT-10222, Vilnius, Lithuania emails: [email protected], [email protected], [email protected]
Vidas Dobrovolskas
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio av. 3, LT-10222, Vilnius, Lithuania emails: [email protected], [email protected], [email protected]
Arūnas Kučinskas
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio av. 3, LT-10222, Vilnius, Lithuania emails: [email protected], [email protected], [email protected]
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Abstract

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We determined zirconium abundance in the atmospheres of 327 red giant branch (RGB) stars in the globular cluster 47 Tuc. The 1D LTE abundances were obtained from the archival VLT GIRAFFE spectra, using 1D hydrostaticATLAS9 stellar model atmospheres and synthetic Zr I line profiles computed with theSYNTHE package. The average zirconium abundance determined in the sample of RGB stars, 〈[Zr/Fe]〉 = +0.38 ± 0.12, agrees well with zirconium abundances obtained at this metallicity in the Galactic field stars, as well as with those observed in other Galactic globular clusters.

Keywords

Globular clusters: individual: 47 TucStars: population IIStars: atmospheresStars: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 309 - 311
Copyright
© International Astronomical Union 2020

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