wmap_shift¶
Massively simplified WMAP9 likelihood reduced to just shift parameter
File |
likelihood/wmap_shift/wmap_shift.so |
Attribution |
The WMAP Collaboration (measurement) |
CosmoSIS team (code) |
|
URL |
|
Citations |
Hinshaw et al, ApJS, 208, 2, 19, 25 |
The full WMAP likelihood is slow and requires a full Boltzmann integration (also slow) to get the CMB spectra.
This module uses a lightweight alternative - the CMB shift parameter, which can be calculated from background evolution alone.
This does not provide as much information as the full likelihood.
Assumptions¶
CMB shift parameter as in LCDM
WMAP9 measurement of parameter
Setup Parameters¶
None
Input values¶
Section |
Name |
Type |
Default |
Description |
|---|---|---|---|---|
distances |
cmbshift |
real |
CMB Shift parameter |
Output values¶
Section |
Name |
Type |
Description |
|---|---|---|---|
likelihoods |
shift_like |
real |
Combined log-likelihood from all WMAP components |