Why is luminosity of a star with degenerate core and He or H shell burning (RG, AGB or between Post-AGB and PN phase) given solely by the core mass? I understand that the relation is a stable result of modeling but what is the physical explanation?
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$\begingroup$ amount of energy produced is proportional to the core luminosity $\endgroup$– HARSHIT GOELCommented Sep 29 at 15:57
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