Physical Parameters and Chemical Composition of a Group of Mild Barium Stars

Spectroscopic studies of five peculiar stars (CD-65°2893, HD 22229, HD 66812, HD 56523 and HD 31341) with presumed elevated abundances of s-process elements are reported. High spectral resolution observations of these stars made in 2008 at the 2.2-m telescope of the European Southern Observatory (ES...

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Published inAstrophysics Vol. 56; no. 1; pp. 57 - 67
Main Authors Rojas, M., Drake, N. A., Pereira, C. B., Kholtygin, A. F.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.03.2013
Springer
Springer Nature B.V
Subjects
Astronomy
Astrophysics
Astrophysics and Astroparticles
Astrophysics and Cosmology
Barium
Chemistry
Composition
Discovery and exploration
Observations
Observations and Techniques
Physics
Physics and Astronomy
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Star formation
Stars
Stars & galaxies
Peculiar stars
barium stars
chemical composition
evolutionary status
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Summary:Spectroscopic studies of five peculiar stars (CD-65°2893, HD 22229, HD 66812, HD 56523 and HD 31341) with presumed elevated abundances of s-process elements are reported. High spectral resolution observations of these stars made in 2008 at the 2.2-m telescope of the European Southern Observatory (ESO) in Chile with the FEROS spectrograph are analyzed. The evolutionary status of the stars is determined, along with some of their fundamental parameters, such as: effective temperature, acceleration of gravity at their surfaces, microturbulence velocity, metallicity, and the abundance of chemical elements, including s-process elements, in their atmospheres.
ISSN:0571-7256
1573-8191
DOI:10.1007/s10511-013-9267-8