Differential Rotation in F Stars

Details Differential Rotation in F Stars Differential Rotation in F Stars

2007-10-12

arxiv.org/abs/0710.2398v1

Astronomy and Astrophysics

Astrophysics

4 pages, overview talk at the 5th Potsdam thinkshop, accepted by AN

Scientific paper

10.1002/asna.200710853

Differential rotation can be detected in single line profiles of stars rotating more rapidly than about $v \sin{i} = 10$ km s$^{-1}$ with the Fourier transform technique. This allows to search for differential rotation in large samples to look for correlations between differential rotation and other stellar parameters. I analyze the fraction of differentially rotating stars as a function of color, rotation, and activity in a large sample of F-type stars. Color and rotation exhibit a correlation with differential rotation in the sense that more stars are rotating differentially in the cooler, less rapidly rotating stars. Effects of rotation and color, however, cannot be disentangled in the underlying sample. No trend with activity is found.

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