Absolute parameters of AE For -- a highly active detached binary of late
  K type
  We present photometric and spectroscopic analysis of AE For -- a detached
eclipsing binary composed of two late K dwarfs. The masses of the components
are found to be 0.6314 +- 0.0035 and 0.6197 +- 0.0034 Msun and the radii to be
0.67 +- 0.03 and 0.63$ +- 0.03 Rsun for primary and secondary component,
respectively. Both components are significantly oversized compared to
theoretical models, which we attribute to their high activity. They show
Halpha, Hbeta, Hgamma, Ca H and Ca K lines in emission, and are heavily
spotted, causing large variations of the light curve.
