wale.VarianceCalculator module

class wale.VarianceCalculator.Variance(cosmo, filter_type, pk)[source]

Bases: object

A class to compute linear and nonlinear variance using power spectrum interpolators and a specific cosmological model.

cosmo

An instance of a cosmology class providing necessary cosmological functions and parameters.

Type:

Cosmology

PK_interpolator_linear

An interpolator instance for linear power spectrum calculations.

Type:

Interpolator

PK_interpolator_nonlinear

An interpolator instance for nonlinear power spectrum calculations.

Type:

Interpolator

model

The name of the cosmological model to be used for variance calculations.

Type:

str

Methods

get_sig_slice(z, R1, R2)

Calculates the slice variance σ² for the given scales and redshift in the nonlinear regime.

linear_sigma2(redshift, R1[, R2])

Calculates the linear variance σ² for given scales and redshift, considering the specified model adjustments.

nonlinear_sigma2(redshift, R1[, R2])

Calculates the nonlinear variance σ² for given scales and redshift, considering the specified model adjustments.
get_sig_slice(z, R1, R2)[source]

Calculates the slice variance σ² for the given scales and redshift in the nonlinear regime.

Parameters:

  • z (float) – The redshift at which to evaluate the slice variance.

  • R1 (float) – The first scale radius.

  • R2 (float) – The second scale radius.

Returns:

The slice variance σ² at the given scales and redshift.

Return type:

float

linear_sigma2(redshift, R1, R2=None, **kwargs)[source]

Calculates the linear variance σ² for given scales and redshift, considering the specified model adjustments.

Parameters:

  • redshift (float) – The redshift at which to evaluate the variance.

  • R1 (float) – The first scale radius.

  • R2 (float, optional) – The second scale radius. Defaults to R1 if not specified.

Returns:

The linear variance σ² at the given scales and redshift.

Return type:

float

nonlinear_sigma2(redshift, R1, R2=None, **kwargs)[source]

Calculates the nonlinear variance σ² for given scales and redshift, considering the specified model adjustments.

Parameters:

  • redshift (float) – The redshift at which to evaluate the variance.

  • R1 (float) – The first scale radius.

  • R2 (float, optional) – The second scale radius. Defaults to R1 if not specified.

Returns:

The nonlinear variance σ² at the given scales and redshift.

Return type:

float