Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research
Can Li-rich K giants eject shells? Assembling the lithium puzzle in K giants. / de la Reza, R.; Drake, N.A.
“Circumstellar Dynamics at High Resolution”, ASP Conference Series. Astronomical Society of the Pacific, 2012. p. 441 стр., 51-57.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research
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TY - GEN
T1 - Can Li-rich K giants eject shells? Assembling the lithium puzzle in K giants
AU - de la Reza, R.
AU - Drake, N.A.
PY - 2012
Y1 - 2012
N2 - The existence of K giant stars with high Li abundance continues to challenge the standard theory of stellar evolution. All recent extensive surveys in the Galaxy show the same result: about 1% of the mainly normal slow rotating K giants are Li rich. We explore here a model with two scenarios based on the important relation of Li-rich and Li-poor K giants with IR excesses. In this model, all K giant stars suffer a rapid enrichment and depletion of Li inducing the formation and ejection of circumstellar shells. The observational detection of these shells will not only validate this model, but also will give important hints on the mechanism of Li enrichment of these stars.
AB - The existence of K giant stars with high Li abundance continues to challenge the standard theory of stellar evolution. All recent extensive surveys in the Galaxy show the same result: about 1% of the mainly normal slow rotating K giants are Li rich. We explore here a model with two scenarios based on the important relation of Li-rich and Li-poor K giants with IR excesses. In this model, all K giant stars suffer a rapid enrichment and depletion of Li inducing the formation and ejection of circumstellar shells. The observational detection of these shells will not only validate this model, but also will give important hints on the mechanism of Li enrichment of these stars.
KW - late-type stars
KW - chemically peculiar stars
KW - circumstellar shells
KW - stellar winds
M3 - Conference contribution
SN - 978-1-58381-810-7
SP - 441 стр., 51-57
BT - “Circumstellar Dynamics at High Resolution”, ASP Conference Series
PB - Astronomical Society of the Pacific
ER -
ID: 4603565