Which stellar object can momentarily achieve surface temperatures exceeding 100,000 Kelvin shortly after formation?

Answer

Young White Dwarf

A newly formed white dwarf can retain a surface temperature exceeding 100,000 Kelvin immediately after formation, which can rival or surpass many active stars.

Which stellar object can momentarily achieve surface temperatures exceeding 100,000 Kelvin shortly after formation?
astronomytemperaturestarsstellar evolutionwhite dwarfblue giantstar temperature