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Clone wikicosmosis / default_modules / BOSS_1303.4486
BOSS module
Compute the likelihood of supplied fsigma8(z=0.57), H(z=0.57), D_a(z=0.57), omegamh2, bsigma8(z=0.57)
Name: BOSS
File: cosmosis-standard-library/likelihood/boss/boss_rsd.py
Version: 1303.4486
Author(s):
- SDSS-III BOSS Team
URL: http://www.sdss3.org
Cite:
Rules:
Assumptions:
- SDSS-III CMASS DR9 dataset
- When using mode = 1 CAMB must be run to output distance parameters and sigma8
- The transfer function must be scale-independent to use this simple formulation: no MG, massive nu, for example.
Explanation
This module calculates the likelihood using the CMASS only results from
Chuang et al. 2013 for fsigma8(z=0.57), H(z=0.57), D_a(z=0.57), omegamh2, bsigma8(z=0.57).
There are two modes: mode=0 give the fsigma8(z=0.57) likelihood only; mode=1 give the more general BOSS likelihood.
##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 |
---|---|
mode | Integer, mode=0 for a fsigma8 likelihood only. mode=1 uses the full results(default = 0) |
feedback | Integer,amount of output to print. 0 for no feedback. 1 for basic (default = 0) |
mean | Real, fsigma8 (default = 0.428) |
sigma | Real, sigma (default = 0.066) |
redshift | Real, redshift (default = 0.57) |
##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 |
---|---|---|
growth_parameters | d_z | 1D real array, linear growth factor D |
f_z | 1D real array, linear growth rate f | |
z | 1D real array, redshift of samples | |
cosmological_parameters | omega_m | real, baryon + cdm density fraction today |
sigma_8 | real, amplitude of linear matter power at 8/h Mpc at z=0 | |
bias | real, galaxy bias | |
h0 | real, hubble parameter H0/(100 km/s/Mpc) | |
distances | z | 1D real array, redshifts of samples |
d_a | 1D real array, angular diameter distance in Mpc | |
h | 1D real array, hubble parameter with in units of Mpc |
##Outputs
These parameters and data are computed as outputs from the module
Section | Parameter | Description |
---|---|---|
likelihoods | BOSS_LIKE | real, likelihood of supplied fsigma8(z=0.57), H(z=0.57), D_a(z=0.57), omegamh2, bsigma8(z=0.57) |
Updated