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apply_astrophysical_biases module
Apply various astrophysical biases to the matter power spectrum P(k,z)
Name: apply_astrophysical_biases
File: cosmosis-standard-library/shear/apply_astrophysical_biases/interface.so
Version: 1.0
Author(s):
- CosmoSIS team
- Simon Samuroff
URL:
Cite:
Rules:
Assumptions:
Explanation
Measurement of the matter power spectrum from real data relies on the visible positions and shapes of galaxies.
Real galaxies offer a window onto the underlying mass distribution but an imperfect one. Due to a variety of
astrophysical processes in their formation and interaction history, the visible mass of galaxies is offset from
the dark matter. Additionally, the precise relationship between their shapes and the total mass is dependent on
the details of how galaxies obtain intrinsic ellipticities. One can parameterise ignorance of these processes
using a series of scale and time dependent biases, which map the matter power spectrum onto the observable
fields.
##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 |
|---|---|
| intrinsic_alignments | Bool; calculate intrisic alignment spectra? (Default: True) |
| galaxy_bias | Bool; calculate galaxy position spectra? (Default: True) |
| verbosity | Integer; parameter setting the level of terminal output (Default: 1) |
##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 |
|---|---|---|
| matter_power_nl | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_k | real 2d array; non-linear matter power spectrum at samples in (Mpc/h)^{-3} | |
| intrinsic_alignment_parameters | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| b_I | real 2d array; intrinsic alignment bias | |
| r_I | real 2d array; stochastic intrinsic alignment bias | |
| bias_field | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| b_g | real 2d array; galaxy bias | |
| r_g | real 2d array; stochastic galaxy bias |
##Outputs
These parameters and data are computed as outputs from the module
| Section | Parameter | Description |
|---|---|---|
| ia_spectrum_ii | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_II | real 2d array; intrinsic-intrinsic shape spectrum at samples in (Mpc/h)^{-3} | |
| ia_spectrum_gi | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_GI | real 2d array; mass-intrinsic shape spectrum at samples in (Mpc/h)^{-3} | |
| matter_power_gal_mass | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_k | real 2d array; galaxy position-mass spectrum at samples in (Mpc/h)^{-3} | |
| matter_power_gal | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_k | real 2d array; galaxy position-position spectrum at samples in (Mpc/h)^{-3} | |
| matter_power_gal_intrinsic | z | real vector; redshift values of P(k,z) samples |
| k_h | real vector; k values of P(k,z) samples in Mpc/h | |
| P_k | real 2d array; Fourier space correlation between galaxy position and intrinsic shape in (Mpc/h)^{-3} |
Updated