White dwarfs have good

Forums General Discussion Inner core temperatures of white dwarfs White dwarfs have good

Dominic Ford

White dwarfs have good thermal conductivity, so the core won’t be much hotter than the surface.

Young white dwarfs start life at ~10 million K. But that phase doesn’t last long. Heat dissipation scales as T^4 (Stefan’s Law), so the initial cooling is very rapid.

A rough calculation suggests that if a white dwarf takes 10 billion years to cool to 10,000 K, the same white dwarf would take only about a decade to cool from 10^7 to 10^6 K, and a few hours to cool from 10^8 to 10^7 K.