Source code for lenstronomy.LightModel.Profiles.hernquist

import lenstronomy.Util.param_util as param_util

__all__ = ['Hernquist', 'HernquistEllipse']


[docs]class Hernquist(object): """ class for pseudo Jaffe lens light (2d projected light/mass distribution """ def __init__(self): from lenstronomy.LensModel.Profiles.hernquist import Hernquist as Hernquist_lens self.lens = Hernquist_lens() self.param_names = ['amp', 'Rs', 'center_x', 'center_y'] self.lower_limit_default = {'amp': 0, 'Rs': 0, 'center_x': -100, 'center_y': -100} self.upper_limit_default = {'amp': 100, 'Rs': 100, 'center_x': 100, 'center_y': 100}
[docs] def function(self, x, y, amp, Rs, center_x=0, center_y=0): """ :param x: :param y: :param amp: :param Rs: scale radius: half-light radius = Rs / 0.551 :param center_x: :param center_y: :return: """ rho0 = self.lens.sigma2rho(amp, Rs) return self.lens.density_2d(x, y, rho0, Rs, center_x, center_y)
[docs] def light_3d(self, r, amp, Rs): """ :param y: :param amp: :param Rs: :param center_x: :param center_y: :return: """ rho0 = self.lens.sigma2rho(amp, Rs) return self.lens.density(r, rho0, Rs)
[docs]class HernquistEllipse(object): """ class for elliptical pseudo Jaffe lens light (2d projected light/mass distribution """ param_names = ['amp', 'Rs', 'e1', 'e2', 'center_x', 'center_y'] lower_limit_default = {'amp': 0, 'Rs': 0, 'e1': -0.5, 'e2': -0.5, 'center_x': -100, 'center_y': -100} upper_limit_default = {'amp': 100, 'Rs': 100, 'e1': 0.5, 'e2': 0.5, 'center_x': 100, 'center_y': 100} def __init__(self): from lenstronomy.LensModel.Profiles.hernquist import Hernquist as Hernquist_lens self.lens = Hernquist_lens() self.spherical = Hernquist()
[docs] def function(self, x, y, amp, Rs, e1, e2, center_x=0, center_y=0): """ :param x: :param y: :param amp: :param a: :param s: :param center_x: :param center_y: :return: """ x_, y_ = param_util.transform_e1e2_square_average(x, y, e1, e2, center_x, center_y) return self.spherical.function(x_, y_, amp, Rs)
[docs] def light_3d(self, r, amp, Rs, e1=0, e2=0): """ :param y: :param amp: :param Rs: :param center_x: :param center_y: :return: """ rho0 = self.lens.sigma2rho(amp, Rs) return self.lens.density(r, rho0, Rs)