PX282 - E5e - asymptotic giant branch (AGB)

after exhausting He in the core, it constitutes of degenerate C and O

there is a H burning shell around it

they alternate in thermal pulses

when He is burning, the H shell expands and cools, resulting in less H fusion

eventually, He depletes

the H shell reignites, drops more He on the shell below, reigniting it

giant convective envelope

dust forms , which is moved up by convection

super wind occurs from envelope ejection

$\dot{M}\approx {10}^{-4}{M}_{\odot }y{r}^{-1}$

for $M<\sim 8M_{\odot }$, when the envelope is lost, evolution stops

there is a degenerate C and O core