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Commit 1b26b3e7 authored by Médéric Boquien's avatar Médéric Boquien
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Implement the computation of dust masses for the DL2007 and DL2014 models.

parent 6a6536f7
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database_builder/__init__.py
View file @ 1b26b3e7
......@@ -406,6 +406,10 @@ def build_dl2007(base):
"4.00", "5.00", "7.00", "8.00", "10.0", "12.0", "15.0",
"20.0", "25.0"]
# Mdust/MH used to retrieve the dust mass as models as given per atom of H
MdMH = {"00":0.0100, "10":0.0100, "20":0.0101, "30":0.0102, "40":0.0102,
"50":0.0103, "60":0.0104}
# Here we obtain the wavelength beforehand to avoid reading it each time.
datafile = open(dl2007_dir + "U{}/U{}_{}_MW3.1_{}.txt".format(umaximum[0],
umaximum[0],
......@@ -420,8 +424,8 @@ def build_dl2007(base):
# We convert wavelengths from μm to nm
wave *= 1000.
# The models are in Jy cm² sr¯¹ H¯¹. We convert this to W/nm.
conv = 4. * np.pi * 1e-30 / cst.m_p * cst.c / (wave * wave) * 1e9
# Conversion factor from Jy cm² sr¯¹ H¯¹ to W nm¯¹ (kg of H)¯¹
conv = 4. * np.pi * 1e-30 / (cst.m_p+cst.m_e) * cst.c / (wave*wave) * 1e9
for model in sorted(qpah.keys()):
for umin in uminimum:
......@@ -436,8 +440,8 @@ def build_dl2007(base):
lumin = np.genfromtxt(io.BytesIO(data.encode()), usecols=(2))
# For some reason fluxes are decreasing in the model files
lumin = lumin[::-1]
# Conversion from Jy cm² sr¯¹ H¯¹ to W/nm
lumin *= conv
# Conversion from Jy cm² sr¯¹ H¯¹to W nm¯¹ (kg of dust)¯¹
lumin *= conv/MdMH[model]
base.add_dl2007(DL2007(qpah[model], umin, umin, wave, lumin))
for umax in umaximum:
......@@ -453,8 +457,8 @@ def build_dl2007(base):
# For some reason fluxes are decreasing in the model files
lumin = lumin[::-1]
# Conversion from Jy cm² sr¯¹ H¯¹ to W/nm
lumin *= conv
# Conversion from Jy cm² sr¯¹ H¯¹to W nm¯¹ (kg of dust)¯¹
lumin *= conv/MdMH[model]
base.add_dl2007(DL2007(qpah[model], umin, umax, wave, lumin))
......@@ -477,6 +481,11 @@ def build_dl2014(base):
"1.9", "2.0", "2.1", "2.2", "2.3", "2.4", "2.5", "2.6", "2.7",
"2.8", "2.9", "3.0"]
# Mdust/MH used to retrieve the dust mass as models as given per atom of H
MdMH = {"000":0.0100, "010":0.0100, "020":0.0101, "030":0.0102,
"040":0.0102, "050":0.0103, "060":0.0104, "070":0.0105,
"080":0.0106, "090":0.0107, "100":0.0108}
# Here we obtain the wavelength beforehand to avoid reading it each time.
datafile = open(dl2014_dir + "U{}_{}_MW3.1_{}/spec_1.0.dat"
.format(uminimum[0], uminimum[0], "000"))
......@@ -490,8 +499,8 @@ def build_dl2014(base):
# We convert wavelengths from μm to nm
wave *= 1000.
# The models are in Jy cm² sr¯¹ H¯¹. We convert this to W/nm.
conv = 4. * np.pi * 1e-30 / cst.m_p * cst.c / (wave * wave) * 1e9
# Conversion factor from Jy cm² sr¯¹ H¯¹ to W nm¯¹ (kg of H)¯¹
conv = 4. * np.pi * 1e-30 / (cst.m_p+cst.m_e) * cst.c / (wave*wave) * 1e9
for model in sorted(qpah.keys()):
for umin in uminimum:
......@@ -504,8 +513,8 @@ def build_dl2014(base):
# For some reason fluxes are decreasing in the model files
lumin = lumin[::-1]
# Conversion from Jy cm² sr¯¹ H¯¹ to W/nm
lumin *= conv
# Conversion from Jy cm² sr¯¹ H¯¹to W nm¯¹ (kg of dust)¯¹
lumin *= conv/MdMH[model]
base.add_dl2014(DL2014(qpah[model], umin, umin, 1.0, wave, lumin))
for al in alpha:
......@@ -518,8 +527,8 @@ def build_dl2014(base):
# For some reason fluxes are decreasing in the model files
lumin = lumin[::-1]
# Conversion from Jy cm² sr¯¹ H¯¹ to W/nm
lumin *= conv
# Conversion from Jy cm² sr¯¹ H¯¹to W nm¯¹ (kg of dust)¯¹
lumin *= conv/MdMH[model]
base.add_dl2014(DL2014(qpah[model], umin, 1e7, al, wave,
lumin))
......
pcigale/creation_modules/dl2007.py
View file @ 1b26b3e7
......@@ -81,8 +81,9 @@ class DL2007(CreationModule):
# we need to normalize them to 1 W here to easily scale them from the
# power absorbed in the UV-optical. If we want to retrieve the dust
# mass at a later point, we have to save their "emissivity" per unit
# mass in W kg¯¹, The gamma parameter does not affect the fact that it
# is for 1 kg because it represents a mass fraction of each component.
# mass in W (kg of dust)¯¹, The gamma parameter does not affect the
# fact that it is for 1 kg because it represents a mass fraction of
# each component.
self.emissivity = np.trapz((1. - gamma) * self.model_minmin.lumin +
gamma * self.model_minmax.lumin,
x=self.model_minmin.wave)
......@@ -110,6 +111,9 @@ class DL2007(CreationModule):
sed.add_info('dust.umin', self.parameters["umin"])
sed.add_info('dust.umax', self.parameters["umax"])
sed.add_info('dust.gamma', self.parameters["gamma"])
# To compute the dust mass we simply divide the luminosity in W by the
# emissivity in W/kg of dust.
sed.add_info('dust.mass', luminosity / self.emissivity, True)
sed.add_contribution('dust.Umin_Umin', self.model_minmin.wave,
luminosity * self.model_minmin.lumin)
......
pcigale/creation_modules/dl2014.py
View file @ 1b26b3e7
......@@ -85,8 +85,9 @@ class DL2014(CreationModule):
# we need to normalize them to 1 W here to easily scale them from the
# power absorbed in the UV-optical. If we want to retrieve the dust
# mass at a later point, we have to save their "emissivity" per unit
# mass in W kg¯¹, The gamma parameter does not affect the fact that it
# is for 1 kg because it represents a mass fraction of each component.
# mass in W (kg of dust)¯¹, The gamma parameter does not affect the
# fact that it is for 1 kg because it represents a mass fraction of
# each component.
self.emissivity = np.trapz((1. - gamma) * self.model_minmin.lumin +
gamma * self.model_minmax.lumin,
x=self.model_minmin.wave)
......@@ -114,6 +115,9 @@ class DL2014(CreationModule):
sed.add_info('dust.umin', self.parameters["umin"])
sed.add_info('dust.alpha', self.parameters["alpha"])
sed.add_info('dust.gamma', self.parameters["gamma"])
# To compute the dust mass we simply divide the luminosity in W by the
# emissivity in W/kg of dust.
sed.add_info('dust.mass', luminosity / self.emissivity, True)
sed.add_contribution('dust.Umin_Umin', self.model_minmin.wave,
luminosity * self.model_minmin.lumin)
......
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