Source code for lenstronomy.LightModel.light_model
__author__ = 'sibirrer'
from lenstronomy.LightModel.linear_basis import LinearBasis
__all__ = ['LightModel']
[docs]class LightModel(LinearBasis):
"""
class to handle extended surface brightness profiles (for e.g. source and lens light)
all profiles come with a surface_brightness parameterization (in units per square angle and independent of
the pixel scale).
The parameter 'amp' is the linear scaling parameter of surface brightness.
Some functional forms come with a total_flux() definition that provide the integral of the surface brightness for a
given set of parameters.
The SimulationAPI module allows to use astronomical magnitudes to be used and translated into the surface brightness
conventions of this module given a magnitude zero point.
"""
def __init__(self, light_model_list, deflection_scaling_list=None, source_redshift_list=None,
smoothing=0.001, sersic_major_axis=None):
"""
:param light_model_list: list of light models
:param deflection_scaling_list: list of floats indicating a relative scaling of the deflection angle from the
reduced angles in the lens model definition (optional, only possible in single lens plane with multiple source
planes)
:param source_redshift_list: list of redshifts for the different light models
(optional and only used in multi-plane lensing in conjunction with a cosmology model)
:param smoothing: smoothing factor for certain models (deprecated)
:param sersic_major_axis: boolean or None, if True, uses the semi-major axis as the definition of the Sersic
half-light radius, if False, uses the product average of semi-major and semi-minor axis. If None, uses the
convention in the lenstronomy yaml setting (which by default is =False)
"""
super(LightModel, self).__init__(light_model_list=light_model_list, smoothing=smoothing,
sersic_major_axis=sersic_major_axis)
self.deflection_scaling_list = deflection_scaling_list
self.redshift_list = source_redshift_list