physical NFW

autogalaxy/config/priors/mass/dark/nfw_physical.yaml

@@ -0,0 +1,33 @@
+NFWPhysical:
+  centre_0:
+    type: Gaussian
+    mean: 0.0
+    sigma: 0.1
+    lower_limit: -inf
+    upper_limit: inf
+  centre_1:
+    type: Gaussian
+    mean: 0.0
+    sigma: 0.1
+    lower_limit: -inf
+    upper_limit: inf
+  ell_comps_0:
+    type: Gaussian
+    mean: 0.0
+    sigma: 0.3
+    lower_limit: -1.0
+    upper_limit: 1.0
+  ell_comps_1:
+    type: Gaussian
+    mean: 0.0
+    sigma: 0.3
+    lower_limit: -1.0
+    upper_limit: 1.0
+  log10M:
+    type: Uniform
+    lower_limit: 6
+    upper_limit: 16
+  concentration:
+    type: Uniform
+    lower_limit: 1
+    upper_limit: 30

autogalaxy/profiles/mass/dark/__init__.py

@@ -7,3 +7,4 @@
 from .nfw_truncated_mcr import NFWTruncatedMCRLudlowSph, NFWTruncatedMCRDuffySph
 from .nfw_truncated_mcr_scatter import NFWTruncatedMCRScatterLudlowSph
 from .nfw_virial_mass_conc import NFWVirialMassConcSph
+from .nfw_physical import NFWPhysical

autogalaxy/profiles/mass/dark/mcr_util.py

@@ -66,7 +66,7 @@ def physical_nfw_to_autogalaxy(
     col_cosmo_obj = set_colossus_cosmo(cosmology, sigma8, ns)
 
     halo = profile_nfw.NFWProfile(
-        M=mass*col_cosmo_obj.h(), c=concentration, z=redshift_object, mdef=mdef
+        M=mass*col_cosmo_obj.h, c=concentration, z=redshift_object, mdef=mdef
     )
 
     critical_surface_density = (
@@ -77,8 +77,8 @@ def physical_nfw_to_autogalaxy(
     kpc_per_arcsec = cosmology.kpc_per_arcsec_from(redshift=redshift_object)
 
     # rho_s in Msun kpc-3, and rs in kpc
-    rho_s = halo.par['rhos']*col_cosmo_obj.h()**2
-    rs = halo.par['rs']/col_cosmo_obj.h()
+    rho_s = halo.par['rhos']*col_cosmo_obj.h**2
+    rs = halo.par['rs']/col_cosmo_obj.h
     r200 = rs * concentration
 
     kappa_s = rho_s * rs / critical_surface_density

autogalaxy/profiles/mass/dark/nfw_physical.py

@@ -0,0 +1,45 @@
+from .nfw import NFW
+from .mcr_util import physical_nfw_to_autogalaxy
+from autogalaxy.cosmology.lensing import LensingCosmology
+from autogalaxy.cosmology.wrap import Planck15
+from typing import Tuple
+
+
+class NFWPhysical(NFW):
+    '''
+    An NFW halo, sampled by it's physical parameters (mass, concentration).
+
+    This class can interpret any mass definition known by `colossus`, specifed by the
+    `mdef` argument. By default, this is `200c`, but one could use `200m`, `500c`, `vir`,
+    etc.
+
+    The `centre` and `ell_comps` are interpreted exactly the same as in the `NFW` halo defined
+    in lensing units. i.e., `centre` is in arcsec.
+    '''
+    def __init__(
+            self,
+            centre: Tuple[float, float] = (0.0, 0.0),
+            ell_comps: Tuple[float, float] = (0.0, 0.0),
+            log10M: float = 12,
+            concentration: float = 10,
+            mdef: str = '200c',
+            redshift_object: float = 0.5,
+            redshift_source: float = 1.0,
+            cosmo: LensingCosmology = Planck15(),
+        ):
+        self.params = {
+            'log10M': log10M,
+            'concentration': concentration,
+            'mdef': mdef,
+            'redshift_object': redshift_object,
+            'redshift_source': redshift_source
+        }
+        kappa_s, scale_radius, radius_at_100 = physical_nfw_to_autogalaxy(
+            10**log10M, concentration,
+            mdef=mdef, redshift_object=redshift_object, redshift_source=redshift_source,
+            cosmology=cosmo
+        )
+        super().__init__(
+            centre, ell_comps,
+            kappa_s, scale_radius,
+        )