Illustrations

In figure , we give an illustration of some synthetic c-m diagrams obtained from the present database. The figure shows in various planes the Gyr isochrones at the different metallicities available ( 0.0004, 0.001, 0.004, 0.008, 0.02, 0.04, and 0.1). The peculiar behaviour of the isochrone is due to the overluminosity and the hotter temperature of these very metal-rich stars discussed in detail in Mowlavi et al. (1998ab).