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ia_z_powerlap module
Name: ia_z_powerlap
File: cosmosis-standard-library/intrinsic_alignments/z_powerlaw/ia_z_powerlaw.py
Version: 2.0
Author(s):
- CosmoSIS team
- Niall Maccrann
URL:
Cite:
Rules:
Assumptions:
- Modify the intrinsic alignment power spectra to have a power-law dependence in (1+z)
Explanation
Basic models of intrinsic alignments assume a specific simple evolution with redshift.
This module takes an existing model of the IA power spectra and modifies them by giving
them additional evolution in z.
Specifically, it takes P_II and P_GI (e.g. as calculated by the la_model module)
and modifies them to:
P_II(k,z) -> (1+z)^alpha P_II(k,z)
P_GI(k,z) -> (1+z)^alpha P_GI(k,z)
##Parameters
These parameters can be set in the module's section in the ini parameter file.
If no default is specified then the parameter is required.
Parameter | Description |
---|---|
name | String; a suffix to use for the input/output sections |
##Inputs
These parameters and data are inputs to the module, either supplied as parameters by the sampler or computed by some previous module. They are loaded from the data block.
Section | Parameter | Description |
---|---|---|
intrinsic_alignment_parameters | alpha | Real; power law index to apply. |
intrinsic_power | k_h | real vector; k values of P(k,z) samples in units of Mpc/h |
z | real vectorarray; redshift values of P(k,z) samples | |
P_K | real 2d array; spectrum of intrinsic-intrinsic power at samples in (Mpc/h)^{-3} | |
matter_intrinsic_power | k_h | real vector; k values of P(k,z) samples in units of Mpc/h |
z | real vectorarray; redshift values of P(k,z) samples | |
P_K | real 2d array; spectrum of matter-intrinsic cross-power at samples in (Mpc/h)^{-3} |
##Outputs
These parameters and data are computed as outputs from the module
Section | Parameter | Description |
---|---|---|
intrinsic_power | k_h | real vector; k values of P(k,z) samples in units of Mpc/h (unchanged from input) |
z | real vectorarray; redshift values of P(k,z) samples (unchanged from input) | |
P_K | real 2d array; updated spectrum of intrinsic-intrinsic power at samples in (Mpc/h)^{-3} | |
matter_intrinsic_power | k_h | real vector; k values of P(k,z) samples in units of Mpc/h (unchanged from input) |
z | real vectorarray; redshift values of P(k,z) samples (unchanged from input) | |
P_K | real 2d array; updated spectrum of matter-intrinsic cross-power at samples in (Mpc/h)^{-3} |
Updated