Exemple #1
0
double xe_PostSahaH(double nH, double H, double T, HRATEEFF *rate_table, TWO_PHOTON_PARAMS *twog,
                           double zstart, double dlna, double **logfminus_hist, double *logfminus_Ly_hist[],
		    unsigned iz, double z, double *Dxe, int model, double energy_rate){

    double s, xeSaha, dxeSaha_dlna, Ddxedlna_Dxe;
	
    s = 3.016103031869581e21 *T*sqrt(T) *exp(-EI/T)/nH;                     /* xe^2/(1-xe) in Saha eq.*/
    xeSaha = 2./(1.+sqrt(1.+4./s));                                         /* Saha equilibrium */
    dxeSaha_dlna = -(EI/T - 1.5)/(2.*xeSaha + s)*xeSaha*xeSaha;             /* Analytic derivative of above expression */  

    if (model == 0) {         /* Peebles model */
      Ddxedlna_Dxe = (rec_HPeebles_dxedlna(xeSaha+0.01*(1.-xeSaha), nH, H, T, T, energy_rate)
		      - rec_HPeebles_dxedlna(xeSaha-0.01*(1.-xeSaha), nH, H, T, T, energy_rate))/0.02/(1.-xeSaha); 
    } 
    else if (model == 1)  {   /* "Recfast" model */
        Ddxedlna_Dxe = (rec_HRecFast_dxedlna(xeSaha+0.01*(1.-xeSaha), nH, H, T, T, energy_rate)
		      - rec_HRecFast_dxedlna(xeSaha-0.01*(1.-xeSaha), nH, H, T, T, energy_rate))/0.02/(1.-xeSaha); 
    }
    else if (model == 2) { /* EMLA model with 2s and 2p decays only, no radiative transfer */
        Ddxedlna_Dxe = (rec_HMLA_dxedlna(xeSaha+0.01*(1.-xeSaha), nH, H, T, T, energy_rate, rate_table)
		      - rec_HMLA_dxedlna(xeSaha-0.01*(1.-xeSaha), nH, H, T, T, energy_rate, rate_table))/0.02/(1.-xeSaha); 
    }
    else {    /* Default mode, with radiative transfer */
        Ddxedlna_Dxe = (rec_HMLA_2photon_dxedlna(xeSaha+0.01*(1.-xeSaha),nH, H, T, T,
                         rate_table, twog, zstart, dlna, logfminus_hist, logfminus_Ly_hist, iz, z, energy_rate)
                      - rec_HMLA_2photon_dxedlna(xeSaha-0.01*(1.-xeSaha), nH, H, T, T,
	                 rate_table, twog, zstart, dlna, logfminus_hist, logfminus_Ly_hist, iz, z, energy_rate))/0.02/(1.-xeSaha);
    }

    *Dxe = dxeSaha_dlna/Ddxedlna_Dxe;

     /* Compute derivative again just so the fminuses are properly updated */
    //dxedlna = rec_HMLA_2photon_dxedlna(xeSaha + *Dxe, nH, H, T, T,rate_table, twog, zstart, dlna, logfminus_hist, logfminus_Ly_hist, iz, z, energy_rate);  

    return xeSaha + *Dxe;

}
Exemple #2
0
void rec_get_xe_next2(REC_COSMOPARAMS *param, double z1, double xe_in, double Tm_in, double *xe_out, double *Tm_out,
                      HRATEEFF *rate_table, int func_select, unsigned iz, TWO_PHOTON_PARAMS *twog_params,
		      double **logfminus_hist, double *logfminus_Ly_hist[], 
                      double *z_prev, double *dxedlna_prev, double *dTmdlna_prev, 
                      double *z_prev2, double *dxedlna_prev2, double *dTmdlna_prev2) {

    double dxedlna, dTmdlna, Tr, nH, ainv, H;  

    Tr = param->T0 * (ainv=1.+z1);
    nH = param->nH0 * ainv*ainv*ainv;
    H = rec_HubbleConstant(param, z1); 
  
    #if (MODEL == PEEBLES)
         dxedlna = func_select==FUNC_HEI  ? rec_helium_dxedt(xe_in, param->nH0, param->T0, param->fHe, H, z1)/H:
                                            rec_HPeebles_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, energy_injection_rate(param,z1));
    #elif (MODEL == RECFAST)
         dxedlna = func_select==FUNC_HEI  ? rec_helium_dxedt(xe_in, param->nH0, param->T0, param->fHe, H, z1)/H:
                                            rec_HRecFast_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, energy_injection_rate(param,z1));
    #elif (MODEL == EMLA2s2p)
         dxedlna = func_select==FUNC_HEI  ? rec_helium_dxedt(xe_in, param->nH0, param->T0, param->fHe, H, z1)/H:
                                            rec_HMLA_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, energy_injection_rate(param,z1), rate_table);
    #else
         dxedlna = func_select==FUNC_HEI  ? rec_helium_dxedt(xe_in, param->nH0, param->T0, param->fHe, H, z1)/H:
                   func_select==FUNC_H2G  ? rec_HMLA_2photon_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, rate_table, twog_params, 
                                                                     param->zstart, param->dlna, logfminus_hist, logfminus_Ly_hist, iz, z1,
																	 energy_injection_rate(param,z1)):        
	           func_select==FUNC_HMLA ? rec_HMLA_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, energy_injection_rate(param,z1), rate_table)
                                           :rec_HPeebles_dxedlna(xe_in, nH*1e-6, H, Tm_in*kBoltz, Tr*kBoltz, energy_injection_rate(param,z1)); /* used for z < 20 only */
    #endif    

	 dTmdlna = rec_dTmdlna(xe_in, Tm_in, Tr, H, param->fHe, nH*1e-6, energy_injection_rate(param,z1));
                                          
    *xe_out = xe_in + param->dlna * (1.25 * dxedlna - 0.25 * (*dxedlna_prev2)); 
    *Tm_out = Tm_in + param->dlna * (1.25 * dTmdlna - 0.25 * (*dTmdlna_prev2));

    *z_prev2       = *z_prev;
    *dxedlna_prev2 = *dxedlna_prev;
    *dTmdlna_prev2 = *dTmdlna_prev;
    *z_prev        = z1;
    *dxedlna_prev  = dxedlna;
    *dTmdlna_prev  = dTmdlna;
	
	
}