CASCADES sample. Gray dots show all the stars of the HIPPARCOS sample with a precision on the parallax better than 14%. The green circles show the 641 targets of the CASCADES survey. The blue and red vertical lines represent the two B-V cutoffs that were introduced to select the targets, and the horizontal gray line shows the absolute magnitude threshold that was used. The four targets that are discussed in this work are represented by the four red stars.