tatt
Compute intrinsic alignment power spectra using Tidal Alignment + Tidal Torquing model
File |
intrinsic_alignments/tatt/tatt_interface.py |
Attribution |
Jonathan Blazek |
URL |
|
Citations |
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.103506 |
This module implements the Tidal Alignment + Tidal Torquing (TATT) model for intrinsic alignments of galaxies. It computes intrinsic alignment power spectra using perturbation theory terms calculated by FastPT.
The model includes: - Linear/Non-linear alignment (NLA) terms - Tidal alignment (TA) contributions - Tidal torquing (TT) contributions - Mixed TA-TT cross terms
The module supports several sub-models: ‘lin’, ‘nla’, ‘ta’, ‘tt’, ‘tatt’, and ‘mixed_only’.
Assumptions
TATT model for intrinsic alignments
Setup Parameters
Name |
Type |
Default |
Description |
|---|---|---|---|
sub_lowk |
bool |
False |
Whether to subtract the lowest k value of the spectrum from the rest |
ia_model |
str |
nla |
IA model to use (‘lin’, ‘nla’, ‘ta’, ‘tt’, ‘tatt’, ‘mixed_only’) |
name |
str |
Suffix to add to output section names |
|
param_name |
str |
Suffix to use when searching for ia parameters |
|
do_galaxy_intrinsic |
bool |
False |
Whether to compute galaxy-intrinsic cross power |
no_IA_E |
bool |
False |
Whether to turn off E-mode intrinsic alignments |
no_IA_B |
bool |
False |
Whether to turn off B-mode intrinsic alignments |
Input values
Section |
Name |
Type |
Default |
Description |
|---|---|---|---|---|
intrinsic_alignment_parameters |
A1 |
real |
1.0 |
Linear alignment amplitude (NLA) |
A2 |
real |
1.0 |
Tidal torquing amplitude |
|
Adel |
real |
Tidal alignment amplitude (alternative to bias_ta*A1) |
||
bias_ta |
real |
1.0 |
Tidal alignment bias parameter |
|
bias_tt |
real |
1.0 |
Tidal torquing bias parameter |
|
alpha1 |
real |
0.0 |
Redshift evolution of A1 |
|
alpha2 |
real |
0.0 |
Redshift evolution of A2 |
|
alphadel |
real |
alpha1 |
Redshift evolution of Adel |
|
z_piv |
real |
0.0 |
Pivot redshift for evolution |
|
cosmological_parameters |
omega_m |
real |
Matter density parameter |
|
matter_power_lin |
z |
real 1d |
Redshift values for linear power |
|
k_h |
real 1d |
Wavenumber values in h/Mpc |
||
p_k |
real 2d |
Linear matter power spectrum |
||
matter_power_nl |
z |
real 1d |
Redshift values for nonlinear power |
|
k_h |
real 1d |
Wavenumber values in h/Mpc |
||
p_k |
real 2d |
Nonlinear matter power spectrum |
||
fastpt |
z |
real 1d |
Redshift grid for FastPT calculations |
|
k_h |
real 1d |
Wavenumber grid for FastPT calculations |
||
P_tt_EE |
real 2d |
Tidal torquing E-mode power spectrum from FastPT |
||
P_tt_BB |
real 2d |
Tidal torquing B-mode power spectrum from FastPT |
||
P_ta_dE1 |
real 2d |
Tidal alignment delta-E1 term from FastPT |
||
P_ta_dE2 |
real 2d |
Tidal alignment delta-E2 term from FastPT |
||
P_ta_EE |
real 2d |
Tidal alignment E-mode power spectrum from FastPT |
||
P_ta_BB |
real 2d |
Tidal alignment B-mode power spectrum from FastPT |
||
P_mix_A |
real 2d |
Mixed TA-TT term A from FastPT |
||
P_mix_B |
real 2d |
Mixed TA-TT term B from FastPT |
||
P_mix_D_EE |
real 2d |
Mixed TA-TT E-mode term D from FastPT |
||
P_mix_D_BB |
real 2d |
Mixed TA-TT B-mode term D from FastPT |
||
Plin |
real 2d |
Linear power spectrum from FastPT |
||
matter_galaxy_power |
z |
real 1d |
Redshift values for matter-galaxy power (if do_galaxy_intrinsic=true) |
|
k_h |
real 1d |
Wavenumber values (if do_galaxy_intrinsic=true) |
||
p_k |
real 2d |
Matter-galaxy cross power (if do_galaxy_intrinsic=true) |
Output values
Section |
Name |
Type |
Description |
|---|---|---|---|
intrinsic_power_ee |
z |
real 1d |
Redshift values for intrinsic E-mode power |
k_h |
real 1d |
Wavenumber values in h/Mpc |
|
p_k |
real 2d |
Intrinsic E-mode power spectrum |
|
intrinsic_power_bb |
z |
real 1d |
Redshift values for intrinsic B-mode power |
k_h |
real 1d |
Wavenumber values in h/Mpc |
|
p_k |
real 2d |
Intrinsic B-mode power spectrum |
|
intrinsic_power |
z |
real 1d |
Redshift values for intrinsic power (copy of EE) |
k_h |
real 1d |
Wavenumber values in h/Mpc |
|
p_k |
real 2d |
Intrinsic power spectrum (copy of EE for consistency) |
|
matter_intrinsic_power |
z |
real 1d |
Redshift values for matter-intrinsic cross power |
k_h |
real 1d |
Wavenumber values in h/Mpc |
|
p_k |
real 2d |
Matter-intrinsic cross power spectrum |
|
galaxy_intrinsic_power |
z |
real 1d |
Redshift values for galaxy-intrinsic power (if do_galaxy_intrinsic=true) |
k_h |
real 1d |
Wavenumber values in h/Mpc |
|
p_k |
real 2d |
Galaxy-intrinsic cross power spectrum (if do_galaxy_intrinsic=true) |