1 files changed, 50 insertions, 0 deletions
diff --git a/vmodels/nfw.hpp b/vmodels/nfw.hpp
new file mode 100644
index 0000000..3e4264f
--- /dev/null
+++ b/vmodels/nfw.hpp
@@ -0,0 +1,50 @@
+#ifndef NFW_MODEL_H_
+#define NFW_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <cmath>
+#include <misc/optvec.hpp>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class nfw
+    :public model<optvec<T>,optvec<T>,optvec<T>,std::string>
+  {
+  private:
+    nfw* do_clone()const
+    {
+      return new nfw<T>(*this);
+    }
+
+    const char* do_get_type_name()const
+    {
+      return "nfw mass profile";
+    }
+  public:
+    nfw()
+    {
+      this->push_param_info(param_info<optvec<T> >("rho0",1));
+      this->push_param_info(param_info<optvec<T> >("rs",1));
+    }
+
+    optvec<T> do_eval(const optvec<T>& x,const optvec<T>& param)
+    {
+      T rho0=get_element(param,0);
+      T rs=get_element(param,1);
+      return rho0/(x/rs*(x/rs+T(1))*(x/rs+T(1)));
+    }
+
+  private:
+    std::string do_get_information()const
+    {
+      return "NFW mass profile\n"
+	"y=rho0/(x/rs*(1+x/rs)^2)\n";
+    }
+  };
+}
+
+
+
+#endif
+//EOF