BOSS¶
Compute the likelihood of supplied fsigma8(z=0.57), H(z=0.57), D_a(z=0.57), omegamh2, bsigma8(z=0.57)
File |
likelihood/boss/boss_rsd.py |
Attribution |
SDSS-III BOSS Team |
URL |
|
Citations |
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.
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.
Setup Parameters¶
Name |
Type |
Default |
Description |
---|---|---|---|
mode |
int |
0 |
Mode=0 for a f*sigma8 likelihood only. mode=1 uses the full results, a likelihood of H(z), D_A(z), ommh2, b * sigma_8, f * sigma_8] |
feedback |
int |
Amount of output to print. 0 for no feedback. 1 for basic (default = 0) |
|
mean |
real |
0.428 |
Mean of f * sigma8 |
sigma |
real |
0.066 |
Error bar on f * sigma8 |
redshift |
real |
0.57 |
Redshift if measurement |
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 |
||
bias |
real |
Galaxy bias |
||
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_LIKE |
real |
Likelihood of supplied fsigma8(z=0.57), H(z=0.57), D_a(z=0.57), omegamh2, bsigma8(z=0.57) |