1994/06/21 by V. Castellani, Castellani, V., S. Degl'Innocenti +1
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9406058
postscript file of 10 pages plus 2 tables 3 figures will be added later as postscript file The latex file and the other two not postscript figures are available upon request at [email protected]
arxiv created 1994/06/22 · arxiv updated 2009/12/01
Previous evolutionary computations concerning stars with masses in the range of the ``Red Giants Transition Phase'' are extended to lower metallicities. Clusters isochrones for two values of the metallicity Z (Z=10E-4, 4E-4) and for ages down to 1 billion years are presented, discussing selected evolutionary features characterizing the structure of the stars during both H or He burning phases. One finds that clusters with Z about equal to 1E-4 an age around 1-2 billion years could be characterized by the occurrence of anomalous He burning variables at a luminosity of the order of LogL= 2.0-2.2 (in solar units).