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mgs_bao module
Compute the likelihood against SDSS MGS data
Name: mgs_bao
File: cosmosis-standard-library/likelihood/mgs_bao/mgs_bao.py
Version: 1409.3242
Author(s):
- MGS team
URL:
Cite:
- A. Ross et al, MNRAS 449 (2015)
Rules:
Assumptions:
- MGS chi2
- FLRW metric and standard BAO size
Explanation
This module gives a likelihood of the redshift-distance and redshift-Hubble
relations in combined form D_v = (da2 * (1+z)2 * dr)**(1./3.)
where dr = z / H. It uses the sound horizon at last-scatter rs_zdrag and
the predicted expansion since last scattering to predict the BAO size
at the redshifts at which SDSS MGS measured them.
##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 |
|---|---|
| verbose | Bool, Print extra output (default = False) |
##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 |
|---|---|---|
| distances | z | 1D real array, redshifts of samples |
| d_m | 1D real array, physical angular diameter distance in Mpc | |
| h | 1D real array, hubble parameter with in units of Mpc | |
| rz_zdrag | real, sound horizon at last scattering in Mpc |
##Outputs
These parameters and data are computed as outputs from the module
| Section | Parameter | Description |
|---|---|---|
| likelihoods | MGS_BAO_LIKE | real, likelihood of supplied expansion history |
Updated