ia_z_powerlap¶
File |
intrinsic_alignments/z_powerlaw/ia_z_powerlaw.py |
Attribution |
CosmoSIS team |
Niall Maccrann |
|
URL |
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)
Assumptions¶
Modify the intrinsic alignment power spectra to have a power-law dependence in (1+z)
Setup Parameters¶
Name |
Type |
Default |
Description |
|---|---|---|---|
name |
str |
A suffix to use for the input/output sections |
Input values¶
Section |
Name |
Type |
Default |
Description |
|---|---|---|---|---|
intrinsic_alignment_parameters |
alpha |
real |
Power law index to apply. |
|
intrinsic_power |
k_h |
real 1d |
Wavenumber k values of P(k,z) samples in units of Mpc/h |
|
z |
real 1d |
Redshift values of P(k,z) samples |
||
P_K |
real 2d |
Spectrum of intrinsic-intrinsic power at samples in (Mpc/h)^{-3} |
||
matter_intrinsic_power |
k_h |
real 1d |
Wavenumber k values of P(k,z) samples in units of Mpc/h |
|
z |
real 1d |
Array; redshift values of P(k,z) samples |
||
P_K |
real 2d |
Spectrum of matter-intrinsic cross-power at samples in (Mpc/h)^{-3} |
Output values¶
Section |
Name |
Type |
Description |
|---|---|---|---|
intrinsic_power |
k_h |
real 1d |
Wavenumber k values of P(k,z) samples in units of Mpc/h (unchanged from input) |
z |
real 1d |
Redshift values of P(k,z) samples (unchanged from input) |
|
P_K |
real 2d |
; updated spectrum of intrinsic-intrinsic power at samples in (Mpc/h)^{-3} |
|
matter_intrinsic_power |
k_h |
real 1d |
Wavenumber k values of P(k,z) samples in units of Mpc/h (unchanged from input) |
z |
real 1d |
Redshift values of P(k,z) samples (unchanged from input) |
|
P_K |
real 2d |
Updated spectrum of matter-intrinsic cross-power at samples in (Mpc/h)^{-3} |