On the formation of hydrogen-deficient post-AGB stars

  title={On the formation of hydrogen-deficient post-AGB stars},
  author={Falk Herwig and Thordis Bl{\"o}cker and Norbert Langer and Thomas Driebe},
We present an evolutionary sequence of a low mass star from the Asymptotic Giant Branch (AGB) through its post AGB stage, during which its surface chemical composition changes from hydrogen-rich to strongly hydrogen-deficient as consequence of a very late thermal pulse, following the socalled born-again scenario. The internal structure and abundance changes during this pulse are computed with a numerical method which allows the physically consistent calculat ion of stellar layers where… CONTINUE READING