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Identifying Li-rich giants from low-resolution spectroscopic survey

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dc.contributor.author Bharat Kumar, Y
dc.contributor.author Reddy, B. E
dc.contributor.author Zhao, G
dc.date.accessioned 2020-11-11T01:38:37Z
dc.date.available 2020-11-11T01:38:37Z
dc.date.issued 2018-04
dc.identifier.citation Journal of Astrophysics and Astronomy, Vol. 39, No. 2, 25 en_US
dc.identifier.issn 0250-6335
dc.identifier.uri http://prints.iiap.res.in/handle/2248/6881
dc.description Open Access © Indian Academy of Sciences; https://doi.org/10.1007/s12036-017-9501-6 en_US
dc.description.abstract In this paper we discuss our choice of a large unbiased sample used for the survey of red giant branch stars for finding Li-rich K giants, and the method used for identifying Li-rich candidates using low-resolution spectra. The sample has 2000 giants within a mass range of 0.8 to 3.0M⊙. Sample stars were selected from the Hipparcos catalogue with colour (B–V) and luminosity (L/L⊙) in such way that the sample covers RGB evolution from its base towards RGB tip passing through first dredge-up and luminosity bump. Low-resolution (R ≈ 2000, 3500, 5000) spectra were obtained for all sample stars. Using core strength ratios of lines at Li I 6707 Å and its adjacent line Ca I 6717 Å we successfully identified 15 K giants with A(Li) > 1.5 dex, which are defined as Li-rich K giants. The results demonstrate the usefulness of low-resolution spectra to measure Li abundance and identify Li-rich giants from a large sample of stars in relatively shorter time periods. en_US
dc.language.iso en en_US
dc.publisher Indian Academy of Sciences en_US
dc.subject Stars en_US
dc.subject Spectroscopy en_US
dc.subject Stellar atmospheres en_US
dc.subject RGB en_US
dc.subject Abundances en_US
dc.subject Lithium rich en_US
dc.title Identifying Li-rich giants from low-resolution spectroscopic survey en_US
dc.type Article en_US

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