N'ihi na isi usoro kpakpando<unk>ndị kpakpando na-emepụta ike site na thermonuclear fusion nke hydrogen na isi, ọnụnọ na ọnọdụ nke mpaghara radiative na-adabere na kpakpando ahụ. Isi usoro kpakpando n'okpuru ihe dị ka 0.3 anyanwụ masses bụ kpamkpam convective, nke pụtara na ha enweghị mpaghara radiative. Site na 0.3 ruo 1.2 anyanwụ masses, mpaghara gburugburu kpakpando isi bụ mpaghara radiation, kewapụrụ site na mpaghara convection dị n'elu site na tachocline. Radius nke mpaghara radiative na-abawanye monotonically na mass, na kpakpando gburugburu 1.2 anyanwụ masses na-abụ ihe fọrọ nke nta ka ọ bụrụ radiative. N'elu 1.2 anyanwụ masses, mpaghara isi na-aghọ mpaghara convection na mpaghara mpaghara bụ mpaghara radiation, na ọnụ ọgụgụ nke ihe dị n'ime mpaghara convective na-abawanye na mass nke kpakpando isi. Ajụjụ: Gịnị na-ekpebi ọnọdụ na ọnọdụ nke mpaghara redioactive maka kpakpando usoro?
ịdị arọ nke kpakpando ahụ.