Accretion Disks
• An accretion disc is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a massive central body.
α-Disc Model
• By using the equation of hydrostatic equilibrium, combined with conservation of angular momentum and assuming that the disc is thin, the equations of disk structure may be solved in terms of the parameter.
Numerical Method
• f1(p,Fz,T)=-3*kes*p*Fz/(4*c*a*T*T*T);
• f2(p,T)=alpha*(p*kb*T/(u*mp)+1/3*a*T*T*T*T)*W*g;
• f3(p,Fz,T)= p*u*mp/(T*kb)*(kes*Fz/c-W*W*z)+3*kes*p*p*Fz/(4*c*a*T*T*T*T);
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