Tolman–Oppenheimer–Volkoff numerical solutions with massless quark EoS

Questions
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1

Hi everybody;

I am facing a problem in running a “Tolman–Oppenheimer–Volkoff numerical solutions with massless quark EoS”. If anyone helps me to run the problem I shall thankful for that.

Massless quark.nb (60.8 KB)

2

Hello,
I retyped equation de1 of your code (please check that I did not make any mistake) and now it runs. My guess is that there was some invisible control cmd or something like that which prevented correct execusion.

Best wishes,
Michael

Massless quark.nb (33.5 KB)

3

Hi Michael,

This is exactly what I want. It’s very helpful for me.
I am thankful to you.

4

Hi Everybody,
I am facing a problem in solving the differential Equations. Please help me to find solution for \Phi(r).

Differential Equations.nb (7.56 KB)

5

Might not have a computable analytic form. I will suggest using NDSolve instead.

6

Hi Sir,
I agree. I am seeking for exact solution (if possible).
Maybe which is beyond my knowledge.