From ffd178e0bd72562a3c2cff9747b6e656edc881dc Mon Sep 17 00:00:00 2001
From: Aaron LI <aaronly.me@gmail.com>
Date: Fri, 27 May 2016 22:47:24 +0800
Subject: Add mass_profile tools

* These tools are mainly use to calculate the total gravitational mass
  profile, as well as the intermediate products (e.g., surface
  brightness profile fitting, gas density profile, NFW fitting, etc.)
* There are additional tools for calculating the luminosity and flux.
* These tools mainly developed by Junhua GU, and contributed by
  Weitian (Aaron) LI, and Zhenghao ZHU.
---
 mass_profile/call_calc_distance.cc | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 mass_profile/call_calc_distance.cc

(limited to 'mass_profile/call_calc_distance.cc')

diff --git a/mass_profile/call_calc_distance.cc b/mass_profile/call_calc_distance.cc
new file mode 100644
index 0000000..cbdd69a
--- /dev/null
+++ b/mass_profile/call_calc_distance.cc
@@ -0,0 +1,52 @@
+#include "calc_distance.h"
+#include <cstdlib>
+#include <cmath>
+#include <iostream>
+using namespace std;
+
+static double cm=1;
+static double s=1;
+static double km=1000*100;
+static double Mpc=3.08568e+24*cm;
+static double kpc=3.08568e+21*cm;
+static double yr=365.*24.*3600.;
+static double Gyr=1e9*yr;
+static double H=71.*km/s/Mpc;
+static const double c=299792458.*100.*cm;
+//const double c=3e8*100*cm;
+static const double pi=4*atan(1);
+static const double omega_m=0.27;
+static const double omega_l=0.73;
+static const double arcsec2arc_ratio=1./60/60/180*pi;
+
+
+
+
+int main(int argc,char* argv[])
+{
+  if(argc<2)
+    {
+      cerr<<"Usage:"<<argv[0]<<" z"<<endl;
+      exit(-1);
+    }
+  if(argc==3)
+    {
+      H=atof(argv[2])*km/s/Mpc;
+    }
+  double z=atof(argv[1]);
+  double d=c/H*calc_angular_distance(z);
+  //double age=calc_age(z);
+  //cout<<d<<endl;
+  cout<<"d_a_cm= "<<d<<" #angular distance in cm"<<endl;
+  cout<<"d_a_mpc= "<<d/Mpc<<"#angular distance in Mpc"<<endl;
+  cout<<"d_l_cm= "<<(1+z)*(1+z)*d<<" #luminosity distance in cm"<<endl;
+  cout<<"d_l_mpc= "<<(1+z)*(1+z)*d/Mpc<<" #luminosity in Mpc"<<endl;
+  cout<<"kpc_per_sec= "<<d/kpc*arcsec2arc_ratio<<" #kpc per arcsec"<<endl;
+  cout<<"For Chandra:"<<endl;
+  cout<<"kpc_per_pixel= "<<d/kpc*0.492*arcsec2arc_ratio<<" #kpc per chandra pixel"<<endl;
+  cout<<"cm_per_pixel= "<<d*.492*arcsec2arc_ratio<<" #cm per chandra pixel"<<endl;
+  cout<<"norm= "<<1E-14/(4*pi*pow(d*(1+z),2))<<" #norm used to calc cooling function"<<endl;
+  //cout<<ddivid(calc_distance,d,0,1,.0001)<<endl;
+  cout<<"E(z)= "<<E(z)<<endl;
+}
+
-- 
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