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Fig. 7

image

Energy generated by helium burning (ϵHe), carbon burning (ϵC), gravitational energy (ϵgrav), energy of the neutrinos (ϵν), and of the axions (ϵax). Thick lines represent sources of energy, and thin lines represent sinks of energy. The dotted line shows the ratio ϵax / ϵν. The vertical dashed line denotes the end of the core helium-burning phase.

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