Composite lenses

class glow.lenses.CombinedLens(p_phys={}, p_prec={})

Bases: PsiAxisym

Create a composite lens.

Parameters:

p_physdict

Physical parameters, with keys:

• lenses (list) – List of lens objects.

Attributes:

asymp_index, asymp_amplitudefloat

If the attributes asymp_index, asymp_amplitude are defined for all the lenses, we assign to the composite lens the following values:

• asymp_index = minimum of all the indices

• asymp_amplitude = sum of all the amplitudes

Methods

check_input()	If the composite lens contains a combination of composite lenses, we flatten them to create a single composite lens.
ddpsi_ddx(x)	Second derivatives of the lensing potential for axisymmetric lenses.
ddpsi_vec(x1, x2)	Second derivatives of the lensing potential.
default_params()	Initialize the default parameters.
display_info()	Print internal information in human-readable form.
dpsi_dx(x)	First derivatives of the lensing potential for axisymmetric lenses.
dpsi_vec(x1, x2)	First derivatives of the lensing potential.
psi(x1, x2)	Lensing potential.
psi_x(x)	Lensing potential for axisymmetric lenses.

default_params()

Initialize the default parameters.

Returns:

p_physdict

Default physical parameters.

p_precdict

Default precision parameters.

check_input()

If the composite lens contains a combination of composite lenses, we flatten them to create a single composite lens.

display_info()

Print internal information in human-readable form.

psi_x(x)

Lensing potential for axisymmetric lenses.

Sum over all the lenses.

dpsi_dx(x)

First derivatives of the lensing potential for axisymmetric lenses.

Sum over all the lenses.

ddpsi_ddx(x)

Second derivatives of the lensing potential for axisymmetric lenses.

Sum over all the lenses.

psi(x1, x2)

Lensing potential.

Sum over all the lenses.

dpsi_vec(x1, x2)

First derivatives of the lensing potential.

Sum over all the lenses.

ddpsi_vec(x1, x2)

Second derivatives of the lensing potential.

Sum over all the lenses.