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http://hdl.handle.net/2248/7320
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DC Field | Value | Language |
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dc.contributor.author | Raghubar Singh | - |
dc.contributor.author | Reddy, B. E | - |
dc.contributor.author | Bharat Kumar, Y | - |
dc.contributor.author | Antia, H. M | - |
dc.date.accessioned | 2020-11-20T13:17:22Z | - |
dc.date.available | 2020-11-20T13:17:22Z | - |
dc.date.issued | 2019-06-10 | - |
dc.identifier.citation | The Astrophysical Journal Letters, Vol. 878, No. 1, L 21 | en_US |
dc.identifier.issn | 2041-8205 | - |
dc.identifier.uri | http://prints.iiap.res.in/handle/2248/7320 | - |
dc.description | Restricted Access © The American Astronomical Society https://doi.org/10.3847/2041-8213/ab2599 | en_US |
dc.description.abstract | In this Letter, we report the discovery of 24 new super Li-rich (A(Li) ≥ 3.2) giants of He-core burning phase at the red clump region. Results are based on a systematic search of a large sample of about 12,500 giants common to the LAMOST spectroscopic and Kepler time-resolved photometric surveys. The two key parameters derived from Kepler data are an average period spacing (Δp) between l = 1 mixed gravity-dominated g-modes and average large frequency-separation (Δν) l = 0 acoustic p-modes, which suggest all the Li-rich giants are in the He-core burning phase. This is the first unbiased survey subjected to a robust technique of asteroseismic analysis to unambiguously determine the evolutionary phase of Li-rich giants. The results provide strong evidence that the Li enhancement phenomenon is associated with giants in the He-core burning phase post He-flash, rather than any other phase on the red giant branch with an inert He-core surrounded by a H-burning shell. | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.subject | Asteroseismology | en_US |
dc.subject | Stars: abundances | en_US |
dc.subject | Stars: evolution | en_US |
dc.subject | Stars: late-type | en_US |
dc.subject | Stars: low-mass | en_US |
dc.title | Survey of Li-rich giants among Kepler and LAMOST fields: determination of Li-rich giants' evolutionary phase | en_US |
dc.type | Article | en_US |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Survey of Li-rich Giants among Kepler and LAMOST Fields Determination of Li-rich Giants' Evolutionary Phase.pdf Restricted Access | 1.12 MB | Adobe PDF | View/Open Request a copy |
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