diff options
Diffstat (limited to 'mass_profile/fit_dbeta_sbp.cpp')
| -rw-r--r-- | mass_profile/fit_dbeta_sbp.cpp | 60 |
1 files changed, 31 insertions, 29 deletions
diff --git a/mass_profile/fit_dbeta_sbp.cpp b/mass_profile/fit_dbeta_sbp.cpp index b74dc0c..833059c 100644 --- a/mass_profile/fit_dbeta_sbp.cpp +++ b/mass_profile/fit_dbeta_sbp.cpp @@ -1,7 +1,7 @@ /* Perform a double-beta density model fitting to the surface brightness data Author: Junhua Gu - Last modified: 2011.01.01 + Last modified: 2016.06.07 This code is distributed with no warrant */ @@ -26,7 +26,7 @@ double dbeta_func(double r, double n01,double rc1,double beta1, double n02,double rc2,double beta2) { - + return abs(n01)*pow(1+r*r/rc1/rc1,-3./2.*abs(beta1))+abs(n02)*pow(1+r*r/rc2/rc2,-3./2.*abs(beta2)); } @@ -38,7 +38,7 @@ static double calc_critical_density(double z, { const double G=6.673E-8;//cm^3 g^-1 s^2 const double E=std::sqrt(Omega_m*(1+z)*(1+z)*(1+z)+1-Omega_m); - const double H=H0*E; + const double H=H0*E; return 3*H*H/8/pi/G; } @@ -57,7 +57,7 @@ public: { return spl.get_value(x); } - + //we need this function, when this object is performing a clone of itself spline_func_obj* do_clone()const { @@ -70,7 +70,7 @@ public: { spl.push_point(x,y); } - + //before getting the intepolated value, the spline should be initialzied by calling this function void gen_spline() { @@ -89,9 +89,9 @@ int main(int argc,char* argv[]) ifstream cfg_file(argv[1]); assert(cfg_file.is_open()); cfg_map cfg=parse_cfg_file(cfg_file); - + //check the existence of following parameters - + const double z=cfg.z; //initialize the radius list, sbp list and sbp error list @@ -147,7 +147,7 @@ int main(int argc,char* argv[]) { rmin=cfg.rmin_kpc*kpc/cm_per_pixel; } - + cerr<<"rmin="<<rmin<<endl; std::list<double> radii_tmp,sbps_tmp,sbpe_tmp; radii_tmp.resize(radii.size()); @@ -195,7 +195,7 @@ int main(int argc,char* argv[]) cf.add_point(x,y);//change with source } cf.gen_spline(); - + //read temperature profile data spline_func_obj Tprof; int tcnt=0; @@ -220,10 +220,10 @@ int main(int argc,char* argv[]) Tprof.gen_spline(); - + default_data_set<std::vector<double>,std::vector<double> > ds; ds.add_data(data<std::vector<double>,std::vector<double> >(radii,sbps,sbpe,sbpe,radii,radii)); - + //initial fitter fitter<vector<double>,vector<double>,vector<double>,double> f; f.load_data(ds); @@ -255,7 +255,7 @@ int main(int argc,char* argv[]) //attach the cooling function a.attach_cfunc(cf); a.set_cm_per_pixel(cm_per_pixel); - + f.set_model(a); //chi^2 statistic vchisq<double> c; @@ -311,7 +311,7 @@ int main(int argc,char* argv[]) } - + //perform the fitting, first freeze beta1, beta2, rc1, and rc2 if(tie_beta) { @@ -328,9 +328,9 @@ int main(int argc,char* argv[]) freeze_param<std::vector<double>,std::vector<double>,std::vector<double>,std::string>("rc2") ); } - + f.fit(); - + f.clear_param_modifier(); //then perform the fitting, freeze beta1 and beta2 @@ -343,7 +343,7 @@ int main(int argc,char* argv[]) f.fit(); double beta1=0; double beta2=0; - + n01=f.get_param_value("n01"); rc1=f.get_param_value("rc1"); n02=f.get_param_value("n02"); @@ -379,19 +379,19 @@ int main(int argc,char* argv[]) } cerr<<"chi square="<<f.get_statistic_value()/(radii.size()-f.get_model().get_num_free_params())<<endl; param_output<<"chi square="<<f.get_statistic_value()/(radii.size()-f.get_model().get_num_free_params())<<endl; - + //c.verbose(false); //f.set_statistic(c); //f.fit(); std::vector<double> p=f.get_all_params(); f.clear_param_modifier(); std::vector<double> mv=f.eval_model(radii,p); - - + + ofstream ofs_sbp("sbp_fit.qdp"); ofs_sbp<<"read serr 2"<<endl; ofs_sbp<<"skip single"<<endl; - + ofs_sbp<<"line on 2"<<endl; ofs_sbp<<"line on 3"<<endl; ofs_sbp<<"line on 4"<<endl; @@ -401,7 +401,7 @@ int main(int argc,char* argv[]) ofs_sbp<<"ls 2 on 3"<<endl; ofs_sbp<<"ls 2 on 4"<<endl; ofs_sbp<<"ls 2 on 5"<<endl; - + ofs_sbp<<"!LAB POS Y 4.00"<<endl; @@ -500,12 +500,14 @@ int main(int argc,char* argv[]) ofs_rho<<x*cm_per_pixel/kpc<<"\t"<<ym<<endl; } */ - + double lower,upper; double dr=1; //calculate the mass profile const double G=6.673E-8;//cm^3 g^-1 s^-2 - static const double mu=1.4074; + // Molecular weight per electron + // Reference: Ettori et al. 2013, Space Sci. Rev., 177, 119-154; Eq.(9) below + static const double mu=1.155; static const double mp=1.67262158E-24;//g static const double M_sun=1.98892E33;//g static const double k=1.38E-16; @@ -532,7 +534,7 @@ int main(int argc,char* argv[]) double dmgas=V_cm3*ne*mu*mp/M_sun; gas_mass+=dmgas; - + ofs_gas_mass<<r*cm_per_pixel/kpc<<"\t"<<gas_mass<<endl; double ne_beta1=dbeta_func(r,n01,rc1,beta1, 0,rc2,beta2); @@ -542,10 +544,10 @@ int main(int argc,char* argv[]) double ne1=dbeta_func(r1,n01,rc1,beta1, n02,rc2,beta2);//cm^3 - + double T_keV=Tprof(r); double T1_keV=Tprof(r1); - + double T_K=T_keV*11604505.9; double T1_K=T1_keV*11604505.9; @@ -560,7 +562,7 @@ int main(int argc,char* argv[]) //Walker et al. 2012 double M=-3.68E13*M_sun*T_keV*r_Mpc*(dlnT/dlnr+dlnn/dlnr); double rho=M/(4./3.*pi*r_cm*r_cm*r_cm); - + double S=T_keV/pow(ne,2./3.); //cout<<r<<"\t"<<M/M_sun<<endl; //cout<<r<<"\t"<<T_keV<<endl; @@ -577,9 +579,9 @@ int main(int argc,char* argv[]) ofs_mass<<r*cm_per_pixel/kpc<<"\t"<<M/M_sun<<endl; if(r<radii.back()) { - ofs_mass_dat<<r*cm_per_pixel/kpc<<"\t0\t"<<M/M_sun<<"\t"<<M/M_sun*.1<<endl; + ofs_mass_dat<<r*cm_per_pixel/kpc<<"\t0\t"<<M/M_sun<<"\t"<<M/M_sun*.1<<endl; } ofs_overdensity<<r*cm_per_pixel/kpc<<"\t"<<rho/calc_critical_density(z)<<endl; - + } } |