autogalaxy.profiles.light.linear.Sersic#

Bases: Sersic, LightProfileLinear

The elliptical Sersic light profile.

Parameters:

centre (Tuple[float, float]) – The (y,x) arc-second coordinates of the profile centre.
ell_comps (Tuple[float, float]) – The first and second ellipticity components of the elliptical coordinate system.
effective_radius (float) – The circular radius containing half the light of this profile.
sersic_index (float) – Controls the concentration of the profile (lower -> less concentrated, higher -> more concentrated).

Methods

`angle`	The position angle in degrees of the major-axis of the ellipse defined by profile, defined counter clockwise from the positive x-axis (0.0 > angle > 180.0).
`angle_radians`	The position angle in radians of the major-axis of the ellipse defined by profile, defined counter clockwise from the positive x-axis (0.0 > angle > 2pi).
`angle_to_profile_grid_from`	The angle between each angle theta on the grid and the profile, in radians.
`axis_ratio`	The ratio of the minor-axis to major-axis (b/a) of the ellipse defined by profile (0.0 > q > 1.0).
`blurred_image_2d_from`	Evaluate the light object's 2D image from a input 2D grid of coordinates and convolve it with a PSF.
`eccentric_radii_grid_from`	Convert a grid of (y,x) coordinates to an eccentric radius: :math: axis_ratio^0.5 (x^2 + (y^2/q))^0.5
`elliptical_radii_grid_from`	Convert a grid of (y,x) coordinates to their elliptical radii values: :math: (x^2 + (y^2/q))^0.5
`has`	Returns True if any attribute of this profile is an instance of the input class cls, else False.
`image_2d_from`	Returns the Sersic light profile's 2D image from a 2D grid of Cartesian (y,x) coordinates.
`image_2d_via_radii_from`	Returns the 2D image of the Sersic light profile from a grid of coordinates which are the radial distances of each coordinate from the its centre.
`lp_instance_from`	Creates an instance of a linear light profile using its parent normal light profile (e.g. the non linear variant which has an intensity parameter).
`luminosity_integral`	Routine to integrate the luminosity of an elliptical light profile.
`luminosity_within_circle_from`	Integrate the light profile to compute the total luminosity within a circle of specified radius.
`padded_image_2d_from`	Evaluate the light object's 2D image from a input 2D grid of padded coordinates, where this padding is sufficient to encapsulate all surrounding pixels that will blur light into the original image given the 2D shape of the PSF's kernel.
`parameters_dict_from`	Returns a dictionary of the parameters of the linear light profile with the intensity added.
`radial_grid_from`	Convert a grid of (y, x) coordinates, to their radial distances from the profile centre (e.g. :math: r = sqrt(x2 + y2)).
`rotated_grid_from_reference_frame_from`	Rotate a grid of (y,x) coordinates which have been transformed to the elliptical reference frame of a profile back to the original unrotated coordinate grid reference frame.
`transformed_from_reference_frame_grid_from`	Transform a grid of (y,x) coordinates from the reference frame of the profile to the original observer reference frame.
`transformed_to_reference_frame_grid_from`	Transform a grid of (y,x) coordinates to the reference frame of the profile.
`unmasked_blurred_image_2d_from`	Evaluate the light object's 2D image from a input 2D grid of coordinates and convolve it with a PSF, using a grid which is not masked.
`visibilities_from`	Evaluate the light object's 2D image from a input 2D grid of coordinates and transform this to an array of visibilities using a autoarray.operators.transformer.Transformer object and therefore a Fourier Transform.

Attributes

`coefficient_tag`	A short string tag used to label the intensity coefficient when this profile is used inside a Basis object (e.g. for multi-Gaussian expansion or shapelet decomposition).
`elliptical_effective_radius`	The effective_radius of a Sersic light profile is defined as the circular effective radius, which is the radius within which a circular aperture contains half the profile's total integrated light.
`half_light_radius`	The radius that contains half of the total light of the profile (the half-light radius).
`regularization`
`sersic_constant`	A parameter derived from Sersic index which ensures that effective radius contains 50% of the profile's total integrated light.
`standard_lp_parent`	Returns the first parent class of the linear light profile which is not a linear light profile itself.