Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 784, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/784/1/L16
Keywords
asteroseismology; stars: abundances; stars: individual (KIC 5000307); stars: late-type; stars: oscillations
Categories
Funding
- ASTERISK project (ASTERoseismic Investigations with SONG and Kepler)
- European Research Council [267864]
- Swedish Research Council [20115042]
- NASA [NNX12AE17G]
- European Communitys Seventh Framework Program [PROSPERITY]
- ERC [338251 StellarAges]
- NASA [NNX12AE17G, 53395] Funding Source: Federal RePORTER
Ask authors/readers for more resources
About 1% of giant stars have been shown to have large surface Li abundances, which is unexpected according to standard stellar evolution models. Several scenarios for lithium production have been proposed, but it is still unclear why these Li-rich giants exist. A missing piece in this puzzle is the knowledge of the exact stage of evolution of these stars. Using low-and-high-resolution spectroscopic observations, we have undertaken a survey of lithium-rich giants in the Kepler field. In this Letter, we report the finding of the first confirmed Li-rich core-helium-burning giant, as revealed by asteroseismic analysis. The evolutionary timescales constrained by its mass suggest that Li production most likely took place through non-canonical mixing at the RGB tip, possibly during the helium flash.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available