Letter to the Editor
Evidence for strong differential rotation in Li-depleted fast rotating F-stars*
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
Corresponding author: A. Reiners, email@example.com
Accepted: 23 August 2002
We report the detection of strong differential rotation on ten fast rotating ( km s-1) stars of spectral types F0–G0 using the Fourier Transform Method, in three cases we find %. Among the six differential rotators with km s-1, five have Li abundances of log , for one object no Li abundance is available to our knowledge. No differentially rotating star with high Li abundance was found, although the average Li abundance of fast rotators in the literature is log . Our results suggest that Li-depleted fast rotators tend to show differential rotation. Interpreting high rotational velocity as indicator of youth, this finding supports the idea of the connection between mixing processes and differential rotation during magnetic breaking in F-stars.
Key words: stars: abundances / stars: evolution / stars: rotation
© ESO, 2002