White dwarfs are dense, hot, inert cores of low-mass stars made primarily of the element carbon, which requires a temperature of _____ to begin fusion. low-mass stars like the sun do not have enough mass to reach such a high temperature.
It needs a temperature of a 600 Million K to start a fusion.
First generation stars were very massive (>30 M) because they were born in
warmish clouds (100k) that required higher density for gravity to overcome
thermal pressure. If the white dwarf the radius gets smaller.
