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cleaned up unused code in cosmology calculator

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Oliver Hahn 2015-06-14 19:36:50 +02:00
parent de7cd09b5d
commit 852f6f0a63
1 changed files with 74 additions and 116 deletions
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190
cosmology.hh
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@ -60,115 +60,106 @@ public:
real_t scale = m_Dplus/m_DplusOne;
return m_pNorm*scale*scale*TransferSq(k)*pow((double)k,(double)m_Cosmology.nspect);
}
inline static double H_of_a( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double a2 = a*a;
double Ha = sqrt(cosm->Omega_m/(a2*a) + cosm->Omega_k/a2
+ cosm->Omega_DE * pow(a,3.+3.*cosm->w_0) * exp(-3.*(a-1.0)*cosm->w_a) );
return Ha;
}
inline static double Hprime_of_a( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double a2 = a*a;
double H = H_of_a( a, Params );
double Hprime = -1.5 * cosm->Omega_m / (a2*a2*H) - cosm->Omega_k / (a2*a*H)
+ 0.5 * cosm->Omega_DE * pow( a, 3.+3.*cosm->w_0 ) * exp( -3.*(a-1.)*cosm->w_a )
* 1.5 / a * ( 1. + cosm->w_0 - a * cosm->w_a );
return Hprime;
}
//! Integrand used by function CalcGrowthFactor to determine the linear growth factor D+
inline static double GrowthIntegrand( double a, void *Params )
{
double Ha = a * H_of_a( a, Params );
return 2.5/( Ha * Ha * Ha );
}
//! Computes the linear theory growth factor D+
/*! Function integrates over member function GrowthIntegrand and computes
* /a
* D+(a) = 5/2 H(a) * | [a'^3 * H(a')^3]^(-1) da'
* /0
*/
real_t CalcGrowthFactor( real_t a )
{
real_t integral = integrate( &GrowthIntegrand, 0.0, a, (void*)&m_Cosmology );
return H_of_a( a, (void*)&m_Cosmology ) * integral;
}
//! Compute the factor relating particle displacement and velocity
/*! Function computes
*
* vfac = a * H(a) * dlogD+ / d log a = a^3 * H'(a) + 5/2 * [ a^2 * D+(a) * H(a) ]^(-1)
*
*/
real_t CalcVFact( real_t a )
{
real_t Dp = CalcGrowthFactor( a );
real_t H = H_of_a( a, (void*)&m_Cosmology );
real_t Hp = Hprime_of_a( a, (void*)&m_Cosmology );
real_t a2 = a*a;
return a2*a * Hp + 2.5 / ( a2 * Dp * H );
}
#if 0
//! integrand function for Calc_fPeebles
/*!
* @sa Calc_fPeebles
*/
inline static double fy( double a, void *Params )
//! Integrand used by function CalcGrowthFactor to determine the linear growth factor D+
inline static double GrowthIntegrand( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double y = cosm->Omega_m*(1.0/a-1.0) + cosm->Omega_L*(a*a-1.0) + 1.0;
return 1.0/pow(y,1.5);
}
//! calculates d log D+/d log a
/*! this version follows the Peebles (TBD: add citation)
* formula to compute Bertschinger's vfact
*/
inline real_t Calc_fPeebles( real_t a )
{
real_t y = m_Cosmology.Omega_m*(1.0/a-1.0) + m_Cosmology.Omega_L*(a*a-1.0) + 1.0;
real_t fact = integrate( &fy, 1e-6, a, (void*)&m_Cosmology );
return (m_Cosmology.Omega_L*a*a-0.5*m_Cosmology.Omega_m/a)/y - 1.0 + a*fy(a,(void*)&m_Cosmology)/fact;
double eta = sqrt((double)(cosm->Omega_r/a/a+cosm->Omega_m/a+cosm->Omega_DE*a*a
+1.0-cosm->Omega_m-cosm->Omega_DE));
return 2.5/(eta*eta*eta);
}
//! Computes the linear theory growth factor D+
/*! Function integrates over member function GrowthIntegrand */
inline real_t CalcGrowthFactor( real_t a )
{
real_t eta = sqrt((double)(m_Cosmology.Omega_r/a/a+m_Cosmology.Omega_m/a+m_Cosmology.Omega_L*a*a
+1.0-m_Cosmology.Omega_m-m_Cosmology.Omega_L));
real_t eta = sqrt((double)(m_Cosmology.Omega_r/a/a+m_Cosmology.Omega_m/a+m_Cosmology.Omega_DE*a*a
+1.0-m_Cosmology.Omega_m-m_Cosmology.Omega_DE));
real_t integral = integrate( &GrowthIntegrand, 0.0, a, (void*)&m_Cosmology );
return eta/a*integral;
}
inline static double InvHubble( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double eta = 1.0/(100.0*sqrt((double)(cosm->Omega_m/(a*a*a)+cosm->Omega_L
+(1.0-cosm->Omega_m-cosm->Omega_L)/(a*a))));
return eta;
}
inline real_t CalcTFac( real_t a0, real_t a1 )
{
real_t fact = integrate( &InvHubble, a0, a1, (void*)&m_Cosmology );
return 1.0/fact;
}
//! Integrand used by function CalcGrowthFactor to determine the linear growth factor D+
inline static double GrowthIntegrand( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double eta = sqrt((double)(cosm->Omega_r/a/a+cosm->Omega_m/a+cosm->Omega_L*a*a
+1.0-cosm->Omega_m-cosm->Omega_L));
return 2.5/(eta*eta*eta);
}
//! Computes the linear theory growth factor D+
/*! Function integrates over member function GrowthIntegrand */
inline real_t CalcGrowthFactor_Matter( real_t a )
{
real_t eta = sqrt((double)(m_Cosmology.Omega_m/a+m_Cosmology.Omega_L*a*a
+1.0-m_Cosmology.Omega_m-m_Cosmology.Omega_L));
real_t integral = integrate( &GrowthIntegrand_Matter, 0.0, a, (void*)&m_Cosmology );
return eta/a*integral;
}
//! Integrand used by function CalcGrowthFactor to determine the linear growth factor D+
inline static double GrowthIntegrand_Matter( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double eta = sqrt((double)(cosm->Omega_m/a+cosm->Omega_L*a*a
+1.0-cosm->Omega_m-cosm->Omega_L));
return 2.5/(eta*eta*eta);
}
real_t ComputeVFactnew( real_t a ){
return Calc_fPeebles(a)*sqrt(m_Cosmology.Omega_m/a+m_Cosmology.Omega_L*a*a+1.0-m_Cosmology.Omega_m-m_Cosmology.Omega_L)*100.0;
}
real_t ComputedDdt( real_t a )
{
return Calc_fPeebles(a);
}
//! Compute the factor relating particle displacement and velocity
real_t ComputeVFact( real_t a ){
real_t fomega, dlogadt, eta;
real_t Omega_k = 1.0 - m_Cosmology.Omega_m - m_Cosmology.Omega_L;
real_t Omega_k = 1.0 - m_Cosmology.Omega_m - m_Cosmology.Omega_DE;
real_t Dplus = CalcGrowthFactor( a );
eta = sqrt( (double)(m_Cosmology.Omega_r/a/a+m_Cosmology.Omega_m/a+ m_Cosmology.Omega_L*a*a + Omega_k ));
eta = sqrt( (double)(m_Cosmology.Omega_r/a/a+m_Cosmology.Omega_m/a+ m_Cosmology.Omega_DE*a*a + Omega_k ));
fomega = (2.5/Dplus-1.5*m_Cosmology.Omega_m/a-Omega_k)/eta/eta;
dlogadt = a*eta;
//... /100.0 since we would have to multiply by H0 to convert
//... the displacement to velocity units. But displacement is
//... in Mpc/h, and H0 in units of h is 100.
//std::cerr << "vfact1 = " << fomega * dlogadt/a *100.0 << "\n";
//std::cerr << "vfact2 = " << ComputeVFactnew(a) << "\n";
//... in Mpc/h, and H0 in units of h is 100.
return fomega * dlogadt/a *100.0;
}
#endif
//! Integrand for the sigma_8 normalization of the power spectrum
/*! Returns the value of the primordial power spectrum multiplied with
@ -243,39 +234,6 @@ public:
return m_Cosmology.sigma8*m_Cosmology.sigma8/sigma0;
}
//! integrand function for comoving line element
inline static double dline( double a, void *Params )
{
Cosmology *cosm = (Cosmology*)Params;
double y = (cosm->Omega_m + cosm->Omega_L*a*a*a)*a;
return 1./sqrt(y);
}
//! compute necessary initial velocity kick to prevent motion of zoom region
real_t ComputeVelocityCompensation( double astart, double afinal )
{
double s = integrate( &dline, astart, afinal, (void*)&m_Cosmology );
//std::cerr << "s = " << s << std::endl;
//std::cerr << "D(z_f) = " << CalcGrowthFactor(afinal) << std::endl;
//std::cerr << "D(z_i) = " << CalcGrowthFactor(astart) << std::endl;
return m_Cosmology.H0 * CalcGrowthFactor(afinal)/CalcGrowthFactor(astart)/s;
}
real_t ComputeVelocityCompensation_2LPT( double astart, double afinal )
{
double s = integrate( &dline, astart, afinal, (void*)&m_Cosmology );
//std::cerr << "s = " << s << std::endl;
//std::cerr << "D(z_f) = " << CalcGrowthFactor(afinal) << std::endl;
//std::cerr << "D(z_i) = " << CalcGrowthFactor(astart) << std::endl;
return m_Cosmology.H0 * pow(CalcGrowthFactor(afinal)/CalcGrowthFactor(astart),2.0)/s;
}
};