double M_sc(double z,
cosmo_info **cosmo,
int mode,
int component){
int i;
int n_k;
size_t n_k_dim;
double *lM_k;
double *lk_P;
double *sigma2;
interp_info *interp;
double delta_sc=1.686;
double b_z;
double r_val;
char mode_name[ADaPS_NAME_LENGTH];
char component_name[ADaPS_NAME_LENGTH];
char sigma2_name[ADaPS_NAME_LENGTH];
static double M_sc_last;
static double z_last=-42.;
if(z!=z_last){
// Set/initialize variance
pspec_names(mode,component,mode_name,component_name);
sprintf(sigma2_name,"sigma2_k_%s_%s_interp",mode_name,component_name);
if(!ADaPS_exist(*cosmo,sigma2_name))
init_power_spectrum_variance(cosmo,z,mode,component);
interp =(interp_info *)ADaPS_fetch(*cosmo,sigma2_name);
b_z =linear_growth_factor(z,*cosmo);
r_val =bisect_array(interp,delta_sc*delta_sc/(b_z*b_z),1e-4);
M_sc_last=M_of_k(take_alog10(r_val),z,*cosmo);
z_last =z;
}
return(M_sc_last);
}
void init_gbpCosmo2gbpCosmo(cosmo_info **cosmo_source,
cosmo_info **cosmo_target,
double z_min,
double M_min,
double M_max,
gbpCosmo2gbpCosmo_info *gbpCosmo2gbpCosmo){
SID_log("Initializing cosmology scaling...",SID_LOG_OPEN|SID_LOG_TIMER);
SID_set_verbosity(SID_SET_VERBOSITY_RELATIVE,-1);
// Store some infor in the gbpCosmo2gbpCosmo_info structure
gbpCosmo2gbpCosmo->M_min =M_min;
gbpCosmo2gbpCosmo->M_max =M_max;
gbpCosmo2gbpCosmo->z_min =z_min;
gbpCosmo2gbpCosmo->cosmo_source=(*cosmo_source);
gbpCosmo2gbpCosmo->cosmo_target=(*cosmo_target);
// Perform minimization
//const gsl_multimin_fminimizer_type *T=gsl_multimin_fminimizer_nmsimplex2;
const gsl_multimin_fminimizer_type *T=gsl_multimin_fminimizer_nmsimplex;
gsl_multimin_fminimizer *s = NULL;
gsl_vector *ss, *x;
gsl_multimin_function minex_func;
// Starting point
x = gsl_vector_alloc (2);
gsl_vector_set (x, 0, 1.); // inv_s
gsl_vector_set (x, 1, z_min); // z_scaled
// Set initial step sizes to 1
ss = gsl_vector_alloc (2);
gsl_vector_set_all (ss, 1.0);
// Set parameters
init_gbpCosmo2gbpCosmo_integrand_params params;
params.cosmo_source=cosmo_source;
params.cosmo_target=cosmo_target;
params.z_source =z_min;
params.R_1 =R_of_M(M_min,*cosmo_source);
params.R_2 =R_of_M(M_max,*cosmo_source);
params.inv_s =gsl_vector_get(x,0);
params.z_target =gsl_vector_get(x,1);
params.n_int =100;
params.wspace =gsl_integration_workspace_alloc(params.n_int);
// Initialize method
minex_func.n = 2;
minex_func.f = init_gbpCosmo2gbpCosmo_minimize_function;
minex_func.params = (void *)(¶ms);
s = gsl_multimin_fminimizer_alloc (T, 2);
gsl_multimin_fminimizer_set(s,&minex_func,x,ss);
// Perform minimization
double size;
int status;
size_t iter = 0;
size_t iter_max=200;
do{
iter++;
status=gsl_multimin_fminimizer_iterate(s);
if(status)
SID_trap_error("Error encountered during minimisation in init_gbpCosmo2gbpCosmo() (status=%d).",ERROR_LOGIC,status);
size = gsl_multimin_fminimizer_size(s);
status = gsl_multimin_test_size(size,1e-2);
} while(status==GSL_CONTINUE && iter<=iter_max);
if(status!=GSL_SUCCESS)
SID_trap_error("Failed to converge during minimisation in init_gbpCosmo2gbpCosmo() (status=%d,iter=%d).",ERROR_LOGIC,status,iter);
// Finalize results
double Omega_M_source = ((double *)ADaPS_fetch(*cosmo_source,"Omega_M") )[0];
double H_Hubble_source=1e2*((double *)ADaPS_fetch(*cosmo_source,"h_Hubble"))[0];
double Omega_M_target = ((double *)ADaPS_fetch(*cosmo_target,"Omega_M") )[0];
double H_Hubble_target=1e2*((double *)ADaPS_fetch(*cosmo_target,"h_Hubble"))[0];
gbpCosmo2gbpCosmo->s_L =1./gsl_vector_get(s->x,0);
gbpCosmo2gbpCosmo->s_M =(Omega_M_target*H_Hubble_target)/(Omega_M_source*H_Hubble_source)*pow((gbpCosmo2gbpCosmo->s_L),3.);
gbpCosmo2gbpCosmo->z_min_scaled=gsl_vector_get(s->x,1);;
// Calculate growth factors needed for
// determining redshift mappings
gbpCosmo2gbpCosmo->D_prime_z_min=linear_growth_factor(z_min, *cosmo_target);
gbpCosmo2gbpCosmo->D_z_scaled =linear_growth_factor(gbpCosmo2gbpCosmo->z_min_scaled,*cosmo_source);
gbpCosmo2gbpCosmo->D_ratio =gbpCosmo2gbpCosmo->D_prime_z_min/gbpCosmo2gbpCosmo->D_z_scaled;
// Clean-up
gsl_vector_free(x);
gsl_vector_free(ss);
gsl_multimin_fminimizer_free(s);
gsl_integration_workspace_free(params.wspace);
SID_set_verbosity(SID_SET_VERBOSITY_DEFAULT);
SID_log("Done.",SID_LOG_CLOSE);
}
