Fig. 12.

Differential rotation $\mathit{\Delta }\mathit{\Omega }$ in Kepler’s field stars. We note the systematic increase of angular velocity contrast with the effective temperature. Grey dot used Kepler’s light curves whereas blue diamonds used the fft technique of Reiners 2002. Some theoretical trends are superimposed (as in Küker et al. 2011) and show a positive slope with possibly a stronger dependency beyond 6000 K as in global stellar convection simulations. Image reproduced by permission from Reinhold and Gizon (2015), copyright by ESO