AGB final thermal pulse (AFTP)
tape-ye garmâyi-ye pâyâni-ye AGB
Fr.: flash de l'hélium final de l'AGB
born-again AGB star
setâre-ye AGB-ye bâzzâdé
Fr.: étoile AGB recyclée
A → post-AGB star that undergoes a last → thermal pulse when it is already on the → white dwarf → cooling track. The thermal pulse will expand the hot central star, whereby hydrogen will be ingested into the → helium burning shell. This will temporarily return the star to the → AGB phase it has previously left.
early AGB phase
fâz-e AGB-ye âqâzin
Fr.: phase initiale de l'AGB
A fairly long-lived step in the evolution of → low-mass and → intermediate-mass stars when helium burning shifts from the center to a shell around the core. At this phase the stellar luminosity is provided almost entirely by → helium shell burning. The He-shell burning generally adds mass to the growing carbon/oxygen core, resulting in → degenerate matter due to its increasing density.