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∂ µ <br />
∂t<br />
<br />
<br />
<br />
r = M + √ M 2 − a 2 2 θ. <br />
r = r+ <br />
<br />
<br />
∂ µ <br />
∂t<br />
r < M + √ M 2 − a 2 2 θ<br />
<br />
<br />
<br />
<br />
<br />
<br />
u µ ∇ µ t <br />
<br />
<br />
<br />
Ω = dϕ<br />
dt<br />
= − gθϕ<br />
gϕϕ<br />
=<br />
a(r2 + a2 − ∆)<br />
(r2 + a2 ) 2 − ∆a22 . <br />
θ<br />
<br />
r → r+ <br />
ΩH =<br />
a<br />
r2 , <br />
+ + a2 <br />
ΩH a M <br />
ΩH <br />
<br />
r = r+ <br />
<br />
χ µ =<br />
∂<br />
∂t<br />
µ<br />
+ ΩH<br />
∂<br />
∂ϕ<br />
µ<br />
<br />
χ µ <br />
<br />
<br />
χ µ <br />
r = r+ <br />
<br />
r = 2M <br />
∂<br />
∂t<br />
µ