def test__summarize_in_units(self):
sersic = al.light_profiles.SphericalSersic(intensity=3.0,
effective_radius=2.0,
sersic_index=2.0)
summary_text = sersic.summarize_in_units(
radii=[al.Length(10.0), al.Length(500.0)],
prefix="sersic_",
unit_length="arcsec",
unit_luminosity="eps",
whitespace=50,
)
i = 0
assert summary_text[i] == "Light Profile = SphericalSersic\n"
i += 1
assert (
summary_text[i] ==
"sersic_luminosity_within_10.00_arcsec 1.8854e+02 eps")
i += 1
assert (
summary_text[i] ==
"sersic_luminosity_within_500.00_arcsec 1.9573e+02 eps")
i += 1
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_arcsec_to_kpc_and_back__errors_raised_if_no_kpc_per_arcsec(
self
):
unit_arcsec = al.Length(value=2.0)
assert unit_arcsec == 2.0
assert unit_arcsec.unit_length == "arcsec"
unit_arcsec = unit_arcsec.convert(unit_length="arcsec")
assert unit_arcsec == 2.0
assert unit_arcsec.unit == "arcsec"
unit_kpc = unit_arcsec.convert(unit_length="kpc", kpc_per_arcsec=2.0)
assert unit_kpc == 4.0
assert unit_kpc.unit == "kpc"
unit_kpc = unit_kpc.convert(unit_length="kpc")
assert unit_kpc == 4.0
assert unit_kpc.unit == "kpc"
unit_arcsec = unit_kpc.convert(unit_length="arcsec", kpc_per_arcsec=2.0)
assert unit_arcsec == 2.0
assert unit_arcsec.unit == "arcsec"
with pytest.raises(exc.UnitsException):
unit_arcsec.convert(unit_length="kpc")
unit_kpc.convert(unit_length="arcsec")
unit_arcsec.convert(unit_length="lol")
def test__within_ellipse_in_counts__check_multiplies_by_exposure_time(
self):
sersic = al.light_profiles.EllipticalSersic(
axis_ratio=0.5,
phi=90.0,
intensity=3.0,
effective_radius=2.0,
sersic_index=2.0,
)
radius = al.Length(0.5, "arcsec")
luminosity_grid = 0.0
xs = np.linspace(-1.8, 1.8, 80)
ys = np.linspace(-1.8, 1.8, 80)
edge = xs[1] - xs[0]
area = edge**2
for x in xs:
for y in ys:
eta = sersic.grid_to_elliptical_radii(np.array([[x, y]]))
if eta < radius:
luminosity_grid += sersic.profile_image_from_grid_radii(
eta) * area
luminosity_integral = sersic.luminosity_within_ellipse_in_units(
major_axis=radius, unit_luminosity="counts", exposure_time=3.0)
assert 3.0 * luminosity_grid[0] == pytest.approx(
luminosity_integral, 0.02)
def test__conversion_requires_kpc_per_arcsec_but_does_not_supply_it_raises_error(
self
):
profile_arcsec = MockDimensionsProfile(
position=(al.Length(1.0, "arcsec"), al.Length(2.0, "arcsec"))
)
with pytest.raises(exc.UnitsException):
profile_arcsec.new_profile_with_units_converted(unit_length="kpc")
profile_kpc = profile_arcsec.new_profile_with_units_converted(
unit_length="kpc", kpc_per_arcsec=2.0
)
with pytest.raises(exc.UnitsException):
profile_kpc.new_profile_with_units_converted(unit_length="arcsec")
def test__unit_length__extracted_from_profile(self):
profile = MockDimensionsProfile(
length=al.Length(value=3.0, unit_length="arcsec")
)
assert profile.unit_length == "arcsec"
profile = MockDimensionsProfile(
length=al.Length(value=3.0, unit_length="kpc")
)
assert profile.unit_length == "kpc"
profile = MockDimensionsProfile(length=1.0)
assert profile.unit_length == None
def unit_length_calc(
self,
length_input: al.Length,
redshift_profile=None,
cosmology=MockCosmology(),
unit_length="arcsec",
**kwargs
):
return al.Length(self.length + length_input, self.unit_length)
def test__luminosity_in_eps__spherical_sersic_2__compare_to_grid(self):
sersic = al.light_profiles.SphericalSersic(intensity=3.0,
effective_radius=2.0,
sersic_index=2.0)
radius = al.Length(1.0, "arcsec")
luminosity_grid = luminosity_from_radius_and_profile(radius=radius,
profile=sersic)
luminosity_integral = sersic.luminosity_within_circle_in_units(
radius=radius, unit_luminosity="eps")
assert luminosity_grid == pytest.approx(luminosity_integral, 0.02)
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_length_units_calculations__profile_is_converted_for_calculation_if_different_to_input_units(
self
):
profile = MockDimensionsProfile(length=al.Length(3.0, "arcsec"))
cosmo = MockCosmology(kpc_per_arcsec=2.0)
# length: arcsec -> arcsec, stays 3.0, length_input: arcsec -> arcsec, stays 1.0
length_input = al.Length(1.0, "arcsec")
length = profile.unit_length_calc(
length_input=length_input, unit_length="arcsec"
)
assert length.unit_length == "arcsec"
assert length == 4.0
# length: arcsec -> arcsec, stays 3.0, length_input kpc -> arcsec, converts to 1.0 / 2.0 = 0.5
length_input = al.Length(1.0, "kpc")
length = profile.unit_length_calc(
length_input=length_input,
unit_length="arcsec",
redshift_profile=0.5,
cosmology=cosmo,
)
assert length.unit_length == "arcsec"
assert length == 3.5
# length: arcsec -> kpc, converts to 3.0 * 2.0 = 6.0, length_input kpc -> kpc, stays 1.0
length_input = al.Length(1.0, "kpc")
length = profile.unit_length_calc(
length_input=length_input,
unit_length="kpc",
redshift_profile=0.5,
cosmology=cosmo,
)
assert length.unit_length == "kpc"
assert length == 7.0
profile = MockDimensionsProfile(length=al.Length(3.0, "kpc"))
# length: kpc -> kpc, stays 3.0, length_input: kpc -> kpc, stays 1.0
length_input = al.Length(1.0, "kpc")
length = profile.unit_length_calc(
length_input=length_input,
unit_length="kpc",
redshift_profile=0.5,
cosmology=cosmo,
)
assert length.unit_length == "kpc"
assert length == 4.0
# length: kpc -> kpc, stays 3.0, length_input: arcsec -> kpc, convert to 1.0 * 2.0 = 2.0
length_input = al.Length(1.0, "arcsec")
length = profile.unit_length_calc(
length_input=length_input,
unit_length="kpc",
redshift_profile=0.5,
cosmology=cosmo,
)
assert length.unit_length == "kpc"
assert length == 5.0
# length: kpc -> arcsec, converts to 3.0 / 2.0 = 1.5, length_input: kpc -> kpc, stays 1.0
length_input = al.Length(1.0, "arcsec")
length = profile.unit_length_calc(
length_input=length_input,
unit_length="arcsec",
redshift_profile=0.5,
cosmology=cosmo,
)
assert length.unit_length == "arcsec"
assert length == 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__profile_mass_units_calculations__profile_is_converted_for_calculation_if_different_to_input_units(
self
):
profile = MockDimensionsProfile(
length=al.Length(1.0, "arcsec"), mass=al.Mass(3.0, "angular")
)
cosmo = MockCosmology(critical_surface_density=2.0)
# mass: angular -> angular, stays 3.0, mass_input: angular -> angular, stays 1.0
mass_input = al.Mass(1.0, "angular")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="angular",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "angular"
assert mass == 4.0
# mass: angular -> angular, stays 3.0, mass_input solMass -> angular, stays as 1.0
mass_input = al.Mass(1.0, "solMass")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="angular",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "angular"
assert mass == 4.0
# mass: angular -> solMass, converts to 3.0 * 2.0 = 6.0, mass_input solMass -> solMass, stays 1.0
mass_input = al.Mass(1.0, "solMass")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="solMass",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "solMass"
assert mass == 7.0
profile = MockDimensionsProfile(
length=al.Length(1.0, "arcsec"), mass=al.Mass(3.0, "solMass")
)
# mass: solMass -> solMass, stays 3.0, mass_input: solMass -> solMass, stays 1.0
mass_input = al.Mass(1.0, "solMass")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="solMass",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "solMass"
assert mass == 4.0
# mass: solMass -> solMass, stays 3.0, mass_input: angular -> solMass, convert to 1.0 * 2.0 = 2.0
mass_input = al.Mass(1.0, "angular")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="solMass",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "solMass"
assert mass == 5.0
# mass: solMass -> angular, stays 3.0, mass_input: solMass -> solMass, stays 1.0
mass_input = al.Mass(1.0, "angular")
mass = profile.unit_mass_calc(
mass_input=mass_input,
unit_mass="angular",
redshift_profile=0.5,
redshift_source=1.0,
cosmology=cosmo,
)
assert mass.unit_mass == "angular"
assert mass == 4.0
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
