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 |