糖心TV

Astronomy Seminar:

Puji Irawati (Institut Teknologi Bandung, Indonesia)

Title: Population Synthesis of CVs at Post-CE stage

Abstract: Standard scenario of cataclysmic variable (CV) evolution is studied by following detailed evolution using Eggleton's STAR code. The input parameters of the population synthesis is chosen using Monte Carlo method  for primary mass, orbital period and mass ratio. The envelope ejection is calculated with alpha-CE prescription, assuming an effective ejection where alpha-CE = 1. Early result gives double peak white dwarf mass distribution of post-common-envelope binary systems. Metallicity is adopted as a fixed parameter in the synthesis, but changing the value will slightly shifted the white dwarf mass distribution towards higher core mass. An approximate post-Helium flash evolution for low mass primary star is also necessary in the synthesis to get a more complete outcome. Another preliminary result shows a non-standard scenario of CVs, obtained by following the evolution of selected samples which have massive secondary star.