Properties of the analyzed sample from the ALHAMBRA catalog. a) Best photometric redshift distribution, b) stellar mass distribution, c) mass versus isophotal area relation, and d) color (m_F365W−m_F582W) versus stellar mass diagram. Gray symbols correspond to the total ALHAMBRA sample. Dashed histograms and open circles correspond to our initial sample, and blue histograms and symbols correspond to our final sample of 29 early-type galaxies after quality control cuts. The dashed black line represents the arbitrary red sequence-blue cloud division at m_F365W−m_F582W < 1.7.