| Abstract : | High lithium abundance among low mass giants has been a puzzle for a long time as stellar models predict only Li depletion from the initial value. Thanks to large spectroscopic surveys and time-resolved photometry for asteroseismic analysis, we now know that Li is only destroyed while giants ascend the red giant branch, but the enhancement is ubiquitous among red clump giants post-He-flash. Identification of Li production site is the significant progress in understanding Li abundance evolution in low mass giants since discovering very high Li in giants four decades ago. I will discuss in this talk the problem of high Li in giants, the recent progress, and its implications for stellar theory. Lithium in Red giants: Implications to Stellar Evolutionary Models. |
