def test__unit_luminosity__extracted_from_profile(self):
profile = MockDimensionsProfile(
luminosity=al.Luminosity(value=3.0, unit_luminosity="eps"),
mass_over_luminosity=al.MassOverLuminosity(
value=3.0, unit_luminosity="eps"
),
)
assert profile.unit_luminosity == "eps"
profile = MockDimensionsProfile(
luminosity=1.0,
mass_over_luminosity=al.MassOverLuminosity(
value=3.0, unit_luminosity="eps"
),
)
assert profile.unit_luminosity == "eps"
profile = MockDimensionsProfile(
luminosity=al.Luminosity(value=3.0, unit_luminosity="eps"),
mass_over_luminosity=1.0,
)
assert profile.unit_luminosity == "eps"
profile = MockDimensionsProfile(
luminosity=al.Luminosity(value=3.0, unit_luminosity="counts"),
mass_over_luminosity=al.MassOverLuminosity(
value=3.0, unit_luminosity="counts"
),
)
assert profile.unit_luminosity == "counts"
profile = MockDimensionsProfile(
luminosity=1.0,
mass_over_luminosity=al.MassOverLuminosity(
value=3.0, unit_luminosity="counts"
),
)
assert profile.unit_luminosity == "counts"
profile = MockDimensionsProfile(
luminosity=al.Luminosity(value=3.0, unit_luminosity="counts"),
mass_over_luminosity=1.0,
)
assert profile.unit_luminosity == "counts"
profile = MockDimensionsProfile(luminosity=1.0, mass_over_luminosity=1.0)
assert profile.unit_luminosity == None
def test__luminosity_units_conversions__uses_exposure_time(self):
sersic_eps = al.light_profiles.SphericalSersic(intensity=al.Luminosity(
3.0, "eps"),
effective_radius=2.0,
sersic_index=1.0)
radius = al.Length(0.5, "arcsec")
luminosity_analytic = luminosity_from_radius_and_profile(
radius=radius, profile=sersic_eps)
luminosity_integral = sersic_eps.luminosity_within_circle_in_units(
radius=radius, unit_luminosity="eps", exposure_time=3.0)
# eps -> eps
assert luminosity_analytic == pytest.approx(luminosity_integral, 1e-3)
# eps -> counts
luminosity_integral = sersic_eps.luminosity_within_circle_in_units(
radius=radius, unit_luminosity="counts", exposure_time=3.0)
assert 3.0 * luminosity_analytic == pytest.approx(
luminosity_integral, 1e-3)
sersic_counts = al.light_profiles.SphericalSersic(
intensity=al.Luminosity(3.0, "counts"),
effective_radius=2.0,
sersic_index=1.0,
)
radius = al.Length(0.5, "arcsec")
luminosity_analytic = luminosity_from_radius_and_profile(
radius=radius, profile=sersic_counts)
luminosity_integral = sersic_counts.luminosity_within_circle_in_units(
radius=radius, unit_luminosity="eps", exposure_time=3.0)
# counts -> eps
assert luminosity_analytic / 3.0 == pytest.approx(
luminosity_integral, 1e-3)
luminosity_integral = sersic_counts.luminosity_within_circle_in_units(
radius=radius, unit_luminosity="counts", exposure_time=3.0)
# counts -> counts
assert luminosity_analytic == pytest.approx(luminosity_integral, 1e-3)
def test__conversions_from_eps_and_counts_and_back__errors_raised_if_no_exposure_time(
self
):
unit_eps = al.Luminosity(value=2.0)
assert unit_eps == 2.0
assert unit_eps.unit_luminosity == "eps"
unit_eps = unit_eps.convert(unit_luminosity="eps")
assert unit_eps == 2.0
assert unit_eps.unit == "eps"
unit_counts = unit_eps.convert(unit_luminosity="counts", exposure_time=2.0)
assert unit_counts == 4.0
assert unit_counts.unit == "counts"
unit_counts = unit_counts.convert(unit_luminosity="counts")
assert unit_counts == 4.0
assert unit_counts.unit == "counts"
unit_eps = unit_counts.convert(unit_luminosity="eps", exposure_time=2.0)
assert unit_eps == 2.0
assert unit_eps.unit == "eps"
with pytest.raises(exc.UnitsException):
unit_eps.convert(unit_luminosity="counts")
unit_counts.convert(unit_luminosity="eps")
unit_eps.convert(unit_luminosity="lol")
def unit_luminosity_calc(
self,
luminosity_input: al.Luminosity = None,
redshift_profile=None,
cosmology=MockCosmology(),
unit_luminosity="eps",
exposure_time: float = None,
**kwargs
):
return al.Luminosity(self.luminosity + luminosity_input, self.unit_luminosity)
def test__mass_conversion_requires_critical_surface_density_but_does_not_supply_it_raises_error(
self
):
profile_angular = MockDimensionsProfile(
position=(al.Length(1.0, "arcsec"), al.Length(2.0, "arcsec")),
param_float=2.0,
length=al.Length(value=3.0, unit_length="arcsec"),
luminosity=al.Luminosity(value=4.0, unit_luminosity="eps"),
mass=al.Mass(value=5.0, unit_mass="angular"),
mass_over_luminosity=al.MassOverLuminosity(
value=6.0, unit_luminosity="eps", unit_mass="angular"
),
)
with pytest.raises(exc.UnitsException):
profile_angular.new_profile_with_units_converted(unit_mass="solMass")
profile_solMass = profile_angular.new_profile_with_units_converted(
unit_mass="solMass", critical_surface_density=10.0
)
with pytest.raises(exc.UnitsException):
profile_solMass.new_profile_with_units_converted(unit_mass="angular")
def test__profile_luminosity_units_calculations__profile_is_converted_for_calculation_if_different_to_input_units(
self
):
profile = MockDimensionsProfile(luminosity=al.Luminosity(3.0, "eps"))
cosmo = MockCosmology()
# luminosity: eps -> eps, stays 3.0, luminosity_input: eps -> eps, stays 1.0
luminosity_input = al.Luminosity(1.0, "eps")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input, unit_luminosity="eps"
)
assert luminosity.unit_luminosity == "eps"
assert luminosity == 4.0
# luminosity: eps -> eps, stays 3.0, luminosity_input counts -> eps, converts to 1.0 / 2.0 = 0.5
luminosity_input = al.Luminosity(1.0, "counts")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input,
unit_luminosity="eps",
redshift_profile=0.5,
cosmology=cosmo,
exposure_time=2.0,
)
assert luminosity.unit_luminosity == "eps"
assert luminosity == 3.5
# luminosity: eps -> counts, converts to 3.0 * 2.0 = 6.0, luminosity_input counts -> counts, stays 1.0
luminosity_input = al.Luminosity(1.0, "counts")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input,
unit_luminosity="counts",
redshift_profile=0.5,
cosmology=cosmo,
exposure_time=2.0,
)
assert luminosity.unit_luminosity == "counts"
assert luminosity == 7.0
profile = MockDimensionsProfile(luminosity=al.Luminosity(3.0, "counts"))
# luminosity: counts -> counts, stays 3.0, luminosity_input: counts -> counts, stays 1.0
luminosity_input = al.Luminosity(1.0, "counts")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input,
unit_luminosity="counts",
redshift_profile=0.5,
cosmology=cosmo,
exposure_time=2.0,
)
assert luminosity.unit_luminosity == "counts"
assert luminosity == 4.0
# luminosity: counts -> counts, stays 3.0, luminosity_input: eps -> counts, convert to 1.0 * 2.0 = 2.0
luminosity_input = al.Luminosity(1.0, "eps")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input,
unit_luminosity="counts",
redshift_profile=0.5,
cosmology=cosmo,
exposure_time=2.0,
)
assert luminosity.unit_luminosity == "counts"
assert luminosity == 5.0
# luminosity: counts -> eps, converts to 3.0 / 2.0 = 1.5, luminosity_input: counts -> counts, stays 1.0
luminosity_input = al.Luminosity(1.0, "eps")
luminosity = profile.unit_luminosity_calc(
luminosity_input=luminosity_input,
unit_luminosity="eps",
redshift_profile=0.5,
cosmology=cosmo,
exposure_time=2.0,
)
assert luminosity.unit_luminosity == "eps"
assert luminosity == 2.5
def test__angular_to_solMass_conversions_of_mass__conversions_convert_values(
self
):
profile_angular = MockDimensionsProfile(
position=(al.Length(1.0, "arcsec"), al.Length(2.0, "arcsec")),
param_float=2.0,
length=al.Length(value=3.0, unit_length="arcsec"),
luminosity=al.Luminosity(value=4.0, unit_luminosity="eps"),
mass=al.Mass(value=5.0, unit_mass="angular"),
mass_over_luminosity=al.MassOverLuminosity(
value=6.0, unit_luminosity="eps", unit_mass="angular"
),
)
assert profile_angular.position == (1.0, 2.0)
assert profile_angular.position[0].unit_length == "arcsec"
assert profile_angular.position[1].unit_length == "arcsec"
assert profile_angular.param_float == 2.0
assert profile_angular.length == 3.0
assert profile_angular.length.unit_length == "arcsec"
assert profile_angular.luminosity == 4.0
assert profile_angular.luminosity.unit_luminosity == "eps"
assert profile_angular.mass == 5.0
assert profile_angular.mass.unit_mass == "angular"
assert profile_angular.mass_over_luminosity == 6.0
assert profile_angular.mass_over_luminosity.unit == "angular / eps"
profile_angular = profile_angular.new_profile_with_units_converted(
unit_mass="angular"
)
assert profile_angular.position == (1.0, 2.0)
assert profile_angular.position[0].unit_length == "arcsec"
assert profile_angular.position[1].unit_length == "arcsec"
assert profile_angular.param_float == 2.0
assert profile_angular.length == 3.0
assert profile_angular.length.unit_length == "arcsec"
assert profile_angular.luminosity == 4.0
assert profile_angular.luminosity.unit_luminosity == "eps"
assert profile_angular.mass == 5.0
assert profile_angular.mass.unit_mass == "angular"
assert profile_angular.mass_over_luminosity == 6.0
assert profile_angular.mass_over_luminosity.unit == "angular / eps"
profile_solMass = profile_angular.new_profile_with_units_converted(
unit_mass="solMass", critical_surface_density=10.0
)
assert profile_solMass.position == (1.0, 2.0)
assert profile_solMass.position[0].unit_length == "arcsec"
assert profile_solMass.position[1].unit_length == "arcsec"
assert profile_solMass.param_float == 2.0
assert profile_solMass.length == 3.0
assert profile_solMass.length.unit_length == "arcsec"
assert profile_solMass.luminosity == 4.0
assert profile_solMass.luminosity.unit_luminosity == "eps"
assert profile_solMass.mass == 50.0
assert profile_solMass.mass.unit_mass == "solMass"
assert profile_solMass.mass_over_luminosity == pytest.approx(60.0, 1.0e-4)
assert profile_solMass.mass_over_luminosity.unit == "solMass / eps"
profile_solMass = profile_solMass.new_profile_with_units_converted(
unit_mass="solMass"
)
assert profile_solMass.position == (1.0, 2.0)
assert profile_solMass.position[0].unit_length == "arcsec"
assert profile_solMass.position[1].unit_length == "arcsec"
assert profile_solMass.param_float == 2.0
assert profile_solMass.length == 3.0
assert profile_solMass.length.unit_length == "arcsec"
assert profile_solMass.luminosity == 4.0
assert profile_solMass.luminosity.unit_luminosity == "eps"
assert profile_solMass.mass == 50.0
assert profile_solMass.mass.unit_mass == "solMass"
assert profile_solMass.mass_over_luminosity == pytest.approx(60.0, 1.0e-4)
assert profile_solMass.mass_over_luminosity.unit == "solMass / eps"
profile_angular = profile_solMass.new_profile_with_units_converted(
unit_mass="angular", critical_surface_density=10.0
)
assert profile_angular.position == (1.0, 2.0)
assert profile_angular.position[0].unit_length == "arcsec"
assert profile_angular.position[1].unit_length == "arcsec"
assert profile_angular.param_float == 2.0
assert profile_angular.length == 3.0
assert profile_angular.length.unit_length == "arcsec"
assert profile_angular.luminosity == 4.0
assert profile_angular.luminosity.unit_luminosity == "eps"
assert profile_angular.mass == 5.0
assert profile_angular.mass.unit_mass == "angular"
assert profile_angular.mass_over_luminosity == pytest.approx(6.0, 1.0e-4)
assert profile_angular.mass_over_luminosity.unit == "angular / eps"
def test__eps_to_counts_conversions_of_luminosity__conversions_convert_values(
self
):
profile_eps = MockDimensionsProfile(
position=(al.Length(1.0, "arcsec"), al.Length(2.0, "arcsec")),
param_float=2.0,
length=al.Length(value=3.0, unit_length="arcsec"),
luminosity=al.Luminosity(value=4.0, unit_luminosity="eps"),
mass=al.Mass(value=5.0, unit_mass="angular"),
mass_over_luminosity=al.MassOverLuminosity(
value=6.0, unit_luminosity="eps", unit_mass="angular"
),
)
assert profile_eps.position == (1.0, 2.0)
assert profile_eps.position[0].unit_length == "arcsec"
assert profile_eps.position[1].unit_length == "arcsec"
assert profile_eps.param_float == 2.0
assert profile_eps.length == 3.0
assert profile_eps.length.unit_length == "arcsec"
assert profile_eps.luminosity == 4.0
assert profile_eps.luminosity.unit_luminosity == "eps"
assert profile_eps.mass == 5.0
assert profile_eps.mass.unit_mass == "angular"
assert profile_eps.mass_over_luminosity == 6.0
assert profile_eps.mass_over_luminosity.unit == "angular / eps"
profile_eps = profile_eps.new_profile_with_units_converted(
unit_luminosity="eps"
)
assert profile_eps.position == (1.0, 2.0)
assert profile_eps.position[0].unit_length == "arcsec"
assert profile_eps.position[1].unit_length == "arcsec"
assert profile_eps.param_float == 2.0
assert profile_eps.length == 3.0
assert profile_eps.length.unit_length == "arcsec"
assert profile_eps.luminosity == 4.0
assert profile_eps.luminosity.unit_luminosity == "eps"
assert profile_eps.mass == 5.0
assert profile_eps.mass.unit_mass == "angular"
assert profile_eps.mass_over_luminosity == 6.0
assert profile_eps.mass_over_luminosity.unit == "angular / eps"
profile_counts = profile_eps.new_profile_with_units_converted(
unit_luminosity="counts", exposure_time=10.0
)
assert profile_counts.position == (1.0, 2.0)
assert profile_counts.position[0].unit_length == "arcsec"
assert profile_counts.position[1].unit_length == "arcsec"
assert profile_counts.param_float == 2.0
assert profile_counts.length == 3.0
assert profile_counts.length.unit_length == "arcsec"
assert profile_counts.luminosity == 40.0
assert profile_counts.luminosity.unit_luminosity == "counts"
assert profile_counts.mass == 5.0
assert profile_counts.mass.unit_mass == "angular"
assert profile_counts.mass_over_luminosity == pytest.approx(0.6, 1.0e-4)
assert profile_counts.mass_over_luminosity.unit == "angular / counts"
profile_counts = profile_counts.new_profile_with_units_converted(
unit_luminosity="counts"
)
assert profile_counts.position == (1.0, 2.0)
assert profile_counts.position[0].unit_length == "arcsec"
assert profile_counts.position[1].unit_length == "arcsec"
assert profile_counts.param_float == 2.0
assert profile_counts.length == 3.0
assert profile_counts.length.unit_length == "arcsec"
assert profile_counts.luminosity == 40.0
assert profile_counts.luminosity.unit_luminosity == "counts"
assert profile_counts.mass == 5.0
assert profile_counts.mass.unit_mass == "angular"
assert profile_counts.mass_over_luminosity == pytest.approx(0.6, 1.0e-4)
assert profile_counts.mass_over_luminosity.unit == "angular / counts"
profile_eps = profile_counts.new_profile_with_units_converted(
unit_luminosity="eps", exposure_time=10.0
)
assert profile_eps.position == (1.0, 2.0)
assert profile_eps.position[0].unit_length == "arcsec"
assert profile_eps.position[1].unit_length == "arcsec"
assert profile_eps.param_float == 2.0
assert profile_eps.length == 3.0
assert profile_eps.length.unit_length == "arcsec"
assert profile_eps.luminosity == 4.0
assert profile_eps.luminosity.unit_luminosity == "eps"
assert profile_eps.mass == 5.0
assert profile_eps.mass.unit_mass == "angular"
assert profile_eps.mass_over_luminosity == pytest.approx(6.0, 1.0e-4)
assert profile_eps.mass_over_luminosity.unit == "angular / eps"
def test__arcsec_to_kpc_conversions_of_length__float_and_tuple_length__conversion_converts_values(
self
):
profile_arcsec = MockDimensionsProfile(
position=(al.Length(1.0, "arcsec"), al.Length(2.0, "arcsec")),
param_float=2.0,
length=al.Length(value=3.0, unit_length="arcsec"),
luminosity=al.Luminosity(value=4.0, unit_luminosity="eps"),
mass=al.Mass(value=5.0, unit_mass="angular"),
mass_over_luminosity=al.MassOverLuminosity(
value=6.0, unit_luminosity="eps", unit_mass="angular"
),
)
assert profile_arcsec.position == (1.0, 2.0)
assert profile_arcsec.position[0].unit_length == "arcsec"
assert profile_arcsec.position[1].unit_length == "arcsec"
assert profile_arcsec.param_float == 2.0
assert profile_arcsec.length == 3.0
assert profile_arcsec.length.unit_length == "arcsec"
assert profile_arcsec.luminosity == 4.0
assert profile_arcsec.luminosity.unit_luminosity == "eps"
assert profile_arcsec.mass == 5.0
assert profile_arcsec.mass.unit_mass == "angular"
assert profile_arcsec.mass_over_luminosity == 6.0
assert profile_arcsec.mass_over_luminosity.unit == "angular / eps"
profile_arcsec = profile_arcsec.new_profile_with_units_converted(
unit_length="arcsec"
)
assert profile_arcsec.position == (1.0, 2.0)
assert profile_arcsec.position[0].unit == "arcsec"
assert profile_arcsec.position[1].unit == "arcsec"
assert profile_arcsec.param_float == 2.0
assert profile_arcsec.length == 3.0
assert profile_arcsec.length.unit == "arcsec"
assert profile_arcsec.luminosity == 4.0
assert profile_arcsec.luminosity.unit == "eps"
assert profile_arcsec.mass == 5.0
assert profile_arcsec.mass.unit_mass == "angular"
assert profile_arcsec.mass_over_luminosity == 6.0
assert profile_arcsec.mass_over_luminosity.unit == "angular / eps"
profile_kpc = profile_arcsec.new_profile_with_units_converted(
unit_length="kpc", kpc_per_arcsec=2.0
)
assert profile_kpc.position == (2.0, 4.0)
assert profile_kpc.position[0].unit == "kpc"
assert profile_kpc.position[1].unit == "kpc"
assert profile_kpc.param_float == 2.0
assert profile_kpc.length == 6.0
assert profile_kpc.length.unit == "kpc"
assert profile_kpc.luminosity == 4.0
assert profile_kpc.luminosity.unit == "eps"
assert profile_arcsec.mass == 5.0
assert profile_arcsec.mass.unit_mass == "angular"
assert profile_kpc.mass_over_luminosity == 6.0
assert profile_kpc.mass_over_luminosity.unit == "angular / eps"
profile_kpc = profile_kpc.new_profile_with_units_converted(
unit_length="kpc"
)
assert profile_kpc.position == (2.0, 4.0)
assert profile_kpc.position[0].unit == "kpc"
assert profile_kpc.position[1].unit == "kpc"
assert profile_kpc.param_float == 2.0
assert profile_kpc.length == 6.0
assert profile_kpc.length.unit == "kpc"
assert profile_kpc.luminosity == 4.0
assert profile_kpc.luminosity.unit == "eps"
assert profile_arcsec.mass == 5.0
assert profile_arcsec.mass.unit_mass == "angular"
assert profile_kpc.mass_over_luminosity == 6.0
assert profile_kpc.mass_over_luminosity.unit == "angular / eps"
profile_arcsec = profile_kpc.new_profile_with_units_converted(
unit_length="arcsec", kpc_per_arcsec=2.0
)
assert profile_arcsec.position == (1.0, 2.0)
assert profile_arcsec.position[0].unit == "arcsec"
assert profile_arcsec.position[1].unit == "arcsec"
assert profile_arcsec.param_float == 2.0
assert profile_arcsec.length == 3.0
assert profile_arcsec.length.unit == "arcsec"
assert profile_arcsec.luminosity == 4.0
assert profile_arcsec.luminosity.unit == "eps"
assert profile_arcsec.mass == 5.0
assert profile_arcsec.mass.unit_mass == "angular"
assert profile_arcsec.mass_over_luminosity == 6.0
assert profile_arcsec.mass_over_luminosity.unit == "angular / eps"
def test__radius_units_conversions__light_profile_updates_units_and_computes_correct_luminosity(
self):
cosmology = mock_cosmology.MockCosmology(arcsec_per_kpc=0.5,
kpc_per_arcsec=2.0)
sersic_arcsec = al.light_profiles.SphericalSersic(
centre=(al.Length(0.0, "arcsec"), al.Length(0.0, "arcsec")),
intensity=al.Luminosity(3.0, "eps"),
effective_radius=al.Length(2.0, "arcsec"),
sersic_index=1.0,
)
sersic_kpc = al.light_profiles.SphericalSersic(
centre=(al.Length(0.0, "kpc"), al.Length(0.0, "kpc")),
intensity=al.Luminosity(3.0, "eps"),
effective_radius=al.Length(4.0, "kpc"),
sersic_index=1.0,
)
radius = al.Length(0.5, "arcsec")
luminosity_analytic = luminosity_from_radius_and_profile(
radius=radius, profile=sersic_arcsec)
# arcsec -> arcsec
luminosity = sersic_arcsec.luminosity_within_circle_in_units(
radius=radius)
assert luminosity_analytic == pytest.approx(luminosity, 1e-3)
# kpc -> arcsec
luminosity_analytic = luminosity_from_radius_and_profile(
radius=1.0, profile=sersic_kpc)
luminosity = sersic_kpc.luminosity_within_circle_in_units(
radius=radius, redshift_profile=0.5, cosmology=cosmology)
assert luminosity_analytic == pytest.approx(luminosity, 1e-3)
radius = al.Length(0.5, "kpc")
luminosity_analytic = luminosity_from_radius_and_profile(
radius=radius, profile=sersic_kpc)
# kpc -> kpc
luminosity = sersic_kpc.luminosity_within_circle_in_units(
radius=radius)
assert luminosity_analytic == pytest.approx(luminosity, 1e-3)
# kpc -> arcsec
luminosity_analytic = luminosity_from_radius_and_profile(
radius=0.25, profile=sersic_arcsec)
luminosity = sersic_arcsec.luminosity_within_circle_in_units(
radius=radius, redshift_profile=0.5, cosmology=cosmology)
assert luminosity_analytic == pytest.approx(luminosity, 1e-3)
radius = al.Length(2.0, "arcsec")
luminosity_arcsec = sersic_arcsec.luminosity_within_circle_in_units(
radius=radius,
redshift_profile=0.5,
unit_mass="angular",
cosmology=cosmology,
)
radius = al.Length(4.0, "kpc")
luminosity_kpc = sersic_arcsec.luminosity_within_circle_in_units(
radius=radius,
redshift_profile=0.5,
unit_mass="angular",
cosmology=cosmology,
)
assert luminosity_arcsec == luminosity_kpc