Relativistic burning on neutron stars
Britgrav 16
Alice Harpole
Supervisors: Ian Hawke & Nils Andersson
GR Low Mach number equations
Continuity
∂
t
D
+
∂
i
(
D
U
i
)
=
-
D
Γ
μ
ν
μ
U
ν
Energy
∂
t
(
D
h
)
+
∂
i
(
U
i
D
h
)
=
u
0
D
p
0
D
t
-
D
h
Γ
μ
ν
μ
U
ν
Momentum
∂
t
U
j
+
U
i
∂
i
U
j
=
-
U
j
D
ln
u
0
D
t
+
Γ
ρ
ν
j
U
ν
U
ρ
-
1
D
h
u
0
∂
j
p
0
+
ξ
∂
j
π
ξ
Velocity constraint
∂
i
ζ
U
i
=
ζ
S
-
1
Γ
1
p
0
∂
p
0
∂
t
Integrating factor
ζ
(
r
,
t
)
=
ζ
(
0
,
t
)
exp
∫
0
r
d
r
'
1
Γ
1
p
0
∂
p
0
∂
r
'