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Episodic lithium production by extra-mixing in red giants | | P.A. Denissenkov
; A. Weiss
; | | Date: |
17 May 2000 | | Subject: | astro-ph | | Affiliation: | St. Petersburg and MPA) and A. Weiss (MPA | | Abstract: | The recent discovery of low-mass red giants with enhanced atmospherical Li abundance in galactic low-metallicity stellar clusters adds to the mysterious phenomenon of the Li-rich giants. We propose a combined scenario for the Li-enrichment: engulfing a giant planet (or brown dwarf) by a red giant (external source) activates inside the giant the "7Be-mechanism" producing Li internally. This episodical Li-production can happen at any time on the red giant branch and is naturally followed by Li-depletion as is observed. Limitations of our scenario are discussed as well. | | Source: | arXiv, astro-ph/0005356 | | Services: | Forum | Review | PDF | Favorites | |
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