SIMBAD references

2002A&A...393L..77R - Astronomy and Astrophysics, volume 393, L77-80 (2002/10-3)

Evidence for strong differential rotation in Li-depleted fast rotating F-stars.


Abstract (from CDS):

We report the detection of strong differential rotation on ten fast rotating (vsini>10km/s) stars of spectral types F0-G0 using the Fourier Transform Method, in three cases we find α> 20%. Among the six differential rotators with vsini>15km/s, five have Li abundances of logε(Li)<1.5, 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 logε(Li)>2.0. 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.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: evolution - stars: rotation

Simbad objects: 12

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