The mass of a white dwarf is
M=ρ⋅V=ρ⋅34πR3=106⋅4.2⋅1027=4.2⋅1033g=4.2⋅1030kg
The Schwarzschild radius is
rg=c22GM=9⋅10162⋅6.67⋅10−11⋅4.2⋅1030=6.23⋅103m=6.23⋅105cm≈106cm
Rrg≈109106=10−3=0.1% , therefore the effects of general relativity play a negligible role.
If the star shrinks to R′=106cm then
R′rg≈1066.23⋅105=0.623. In this case the general theory of relativity is needed to study the dynamics of this star.
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