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Chemical analysis of three barium stars: HD 51959, HD 88035, HD 121447

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dc.contributor.author Drisya, K
dc.contributor.author Goswami, A
dc.contributor.author Sridhar, N
dc.contributor.author Masseron, T
dc.contributor.author Meenakshi, P
dc.date.accessioned 2020-11-17T02:31:56Z
dc.date.available 2020-11-17T02:31:56Z
dc.date.issued 2018-05
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 476, No. 3, pp. 3086-3096 en_US
dc.identifier.issn 1365-2966
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7030
dc.description Restricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/sty320 en_US
dc.description.abstract We present elemental abundance results from high-resolution spectral analysis of three nitrogen-enhanced barium stars. The analysis is based on spectra obtained with the fibre- fed extended range optical spectrograph attached to 1.52 m telescope at European Southern Observatory, Chile. The spectral resolution is R ∼ 48,000 and the spectral coverage spans from 3500 to 9000Å . For the objects HD 51959 and HD 88035, we present the first-time abundance analyses results. Although a few studies are available in literature on the object HD 121447, the results are significantly different from each other. We have therefore carried out a detailed chemical composition study for this object based on a high-resolution spectrum with high S/N ratio, for a better understanding of the origin of the abundance patterns observed in this star. Stellar atmospheric parameters, the effective temperature, surface gravity, microturbulence, and metallicity of the stars are determined from the local thermodynamic equilibrium analysis using model atmospheres. The metallicities of HD 51959 and HD 88035 are found to be near- solar; they exhibit enhanced abundances of neutron-capture elements. HD 121447 is found to be moderately metal-poor with [Fe/H] =− 0.65. While carbon is near-solar in the other two objects, HD 121447 shows carbon enhancement at a level, [C/Fe] = 0.82. Neutron-capture elements are highly enhanced with [X/Fe] > 2 (X: Ba, La, Pr, Nd, Sm) in this object. The α - and iron-peak elements show abundances very similar to field giants with the same metal- licity. From kinematic analysis all the three objects are found to be members of thin disc population with a high probability of 0.99, 0.99, and 0.92 for HD 51959, HD 88035, and HD 121447, respectively. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of the Royal Astronomical Society en_US
dc.subject Stars: Abundances en_US
dc.subject Stars: Carbon en_US
dc.subject Stars: Late-type en_US
dc.subject Stars: Population II en_US
dc.title Chemical analysis of three barium stars: HD 51959, HD 88035, HD 121447 en_US
dc.type Article en_US


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