The evolution of white dwarfs resulting from helium-enhanced, low-metallicity progenitor stars

Understand

Some globular clusters host multiple stellar populations with different chemical abundance patterns.

• This is particularly true for $\omega$ Centauri, which shows clear evidence of a helium- enriched sub-population characterized by a helium abundance as high as $Y= 0.4$.
• We present a whole and consistent set of evolutionary tracks from the ZAMS to the white dwarf stage appropriate for the study of the formation and evolution of white dwarfs resulting from the evolution of helium-rich progenitors.
• Different issues of the white dwarf evolution and their helium-rich progenitors have been explored.