Long-term monitoring of large-scale magnetic fields across optical and near-infrared domains with ESPaDOnS, Narval, and SPIRou - The cases of EV Lac, DS Leo, and CN Leo

Open Access

Fig. 11.

Differential rotation search for DS Leo. Top: 2020b2021a. Bottom: 2021b2022a. The plots show the $χ_{r}^{2}$ $\chi^2_r$ landscape over a grid of (P_rot, eq,dΩ) pairs, with the 1σ and 3σ contours. The best values are obtained by fitting a 2D paraboloid around the minimum, while their error bars are estimated from the projection of the 1σ contour on the respective axis (Press et al. 1992).

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