Fig. 4

Optical-NIR, color−color diagram, B − I vs. I − KS of the integrated colors of the PRGs and their neighbor galaxies shown with labeled red squares. Different gray dashed-lines show the age-labeled isochrones with increasing age from bottom to top for all metallicities in the Bruzual & Charlot SSP models as indicated in the figure legend. The typical photometric uncertainty of the galaxies’ colors, given by SDSS and 2MASS, is about 0.2 mag, and is shown in the bottom right.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.