Evolution and colors of helium-core white dwarf stars with high-metallicity progenitors L. G. Althaus, J. A. Panei, A. D. Romero, R. D. Rohrmann, A. H. Córsico, E. García-Berro and M. M. Miller Bertolami A&A, 502 1 (2009) 207-216 Published online: 04 June 2009 DOI: 10.1051/0004-6361/200911640