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 r:
:param amp:
:param Rs:
: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 Rs:
:param e1:
:param e2:
: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 r:
:param amp:
:param Rs:
:param e1:
:param e2:
:return:
"""
rho0 = self.lens.sigma2rho(amp, Rs)
return self.lens.density(r, rho0, Rs)