Class: BinaryModelAngular

Bases: Base

Represent a binary companion using angular separation and position angle.

Parameters:

Name	Type	Description	Default
sep	float or array - like	On-sky separation in milliarcseconds.	required
pa	float or array - like	Position angle in degrees, measured East of North.	required
contrast	float or array - like	Brightness contrast ratio star/companion.	required

Notes

This parameterization is often convenient for reporting astrophysical constraints directly in polar-like coordinates. The model evaluates complex visibilities on the provided interferometric baseline geometry.

__init__(sep, pa, contrast)

Initialize a binary model in angular coordinates.

Parameters:

Name	Type	Description	Default
sep	float or array - like	Separation in milliarcseconds.	required
pa	float or array - like	Position angle in degrees.	required
contrast	float or array - like	Contrast ratio between primary and companion (star/companion).	required

__repr__()

Return a readable representation of binary angular parameters.

unpack_all()

Return all model parameters in angular form.

Returns:

Type	Description
tuple[array - like, array - like, array - like]	Tuple (sep, pa, contrast).

model(u, v, wavel)

Evaluate complex visibilities for this angular binary model.

Parameters:

Name	Type	Description	Default
u	array - like	Baseline u coordinates in meters.	required
v	array - like	Baseline v coordinates in meters.	required
wavel	array - like	Effective wavelength(s) in meters.	required

Returns:

Type	Description
array - like	Complex visibility samples on the provided baselines.