boss_dr12¶
Compute the likelihood of the supplied expansion and growth history against BOSS DR12 data
File |
likelihood/boss_dr12/boss_dr12.py |
Attribution |
CosmoSIS Team |
URL |
|
Citations |
arxiv: 1607.03155 |
This module gives a likelihood of the comoving angular diameter distance D_m, the Hubble parameter H(z) and f*sigma_8. It uses the sound horizon at last-scatter rs_zdrag. A correlated Gaussian likelihood is then returned.
Assumptions¶
LCDM Model
Details of BOSS reconstruction
Setup Parameters¶
Name |
Type |
Default |
Description |
|---|---|---|---|
mode |
int |
0 |
0 for BAO only, 1 for BAO+FS measurements |
data_file |
str |
Included file |
Path to file with measured D_m(z1), H(z1), fsig8(z1), D_m(z2), etc values |
cov_file |
str |
Included file |
Path to covariance matrix file |
redshift_file |
str |
Included file |
Path to file with the effective redshifts of the measurements |
rs_fiducial |
real |
147.78 |
Fiducial value of sound horizon at last scattering used in making data |
feedback |
int |
0 |
Feedback level - 0 for no feedback, 1 for lots |
Input values¶
Section |
Name |
Type |
Default |
Description |
|---|---|---|---|---|
growth_parameters |
d_z |
real 1d |
Linear growth factor D(z) |
|
f_z |
real 1d |
Linear growth rate f(z) |
||
z |
real 1d |
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 |
||
h0 |
real |
Hubble parameter H0/(100 km/s/Mpc) |
||
distances |
z |
real 1d |
Redshifts of samples |
|
d_a |
real 1d |
Angular diameter distance in Mpc |
||
h |
real 1d |
Hubble parameter with in units of Mpc |
Output values¶
Section |
Name |
Type |
Description |
|---|---|---|---|
likelihoods |
boss_dr12_like |
real |
Likelihood of supplied expansion history |