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Clone wikicosmosis / default_modules / planck_1.0
planck module
Likelihood function of CMB from Planck
Name: planck
File: cosmosis-standard-library/likelihood/planck/planck_interface.so
Version: 1.0
Author(s):
- The Planck Collaboration
URL:
Cite:
- Planck collaboration, arXiv:1303.5075
- Hinshaw et al, ApJS, 208, 2, 19, 25 (If low-ell polarization from WMAP used)
- Dunkley et al, JCAP, 07, 025 (If ACT data used)
- Hou et al, 2014 ApJ, 782, 74 (If SPT data used)
Rules:
- "Likelihood released by Planck Collaboration and packaged by cosmosis team. Contact the latter with problems in the first instance. Different papers should be cited depending which data sets are used with this module. "
Assumptions:
- Highly accurate CMB calculations are required
- In the high-ell regime models for the foregrounds and secondary anisotropies are assumed
Explanation
The Planck space telescope has provided the most powerful current
CMB data from quadrupole to sub-degree scales.
The Planck Collaboration released a likelihood code (the PLC) to which one passes
both a file containing the data to be used, the theory spectra to compare to that
data, and a set of nuisance parameters that the code uses (somewhat opaquely) to
model the effects of foreground components, secondary anisotropies, and Planck beams and
gains. For more details see the papers by the Planck collaboration and web documentation.
The low-ell polarization data currently use WMAP data rather than Planck (as of v1.0).
We do not describe the nuisance parameters in detail here; reasonable ranges and values
for them are given in the Planck papers; they should be marginalized over in full
analysis. Different parameters are used for different data sets.
The cosmosis team wrote the wrapper which connects the PLC into
cosmosis.
##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 |
|---|---|
| t_low_file | File path to low-ell temperature likelihood file released by Planck Collaboration. |
| p_low_file | File path to low-ell polarization likelihood file released by Planck Collaboration. |
| t_high_file | File path to high-ell temperature data likelihood file released by Planck Collaboration. |
| lensing_file | File path to lensing likelihood file released by Planck Collaboration. |
##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 |
|---|---|---|
| cmb_cl | ell | Integer vector of angular frequencies for CMB spectra |
| tt | Double vector of temperature spectra in l*(l+1) C_ell / uK^2 (if using TT data) | |
| ee | Double vector of E-mode polarization spectra in l*(l+1) C_ell / uK^2 (if using pol data) | |
| bb | Double vector of B-mode polarization spectra in l*(l+1) C_ell / uK^2 (if using pol data) | |
| te | Double vector of cross spectra in l*(l+1) C_ell / uK^2 (if using pol data) | |
| pp | Double vector of phi-phi spectra in l*(l+1) C_ell (if using lensing) | |
| planck | A_ps_100 | Planck point source amplitude parameter at 100 GHz |
| A_ps_143 | Planck point source amplitude parameter at 143 GHz | |
| A_ps_217 | Planck point source amplitude parameter at 217 GHz | |
| A_cib_143 | Planck Cosmic Infrared Background amplitude parameter at 143 GHz | |
| A_cib_217 | Planck Cosmic Infrared Background amplitude parameter at 217 GHz | |
| A_sz | Planck Sunyaev-Zeldovich effect parameter | |
| r_ps | Planck point source ratio parameter | |
| r_cib | Planck Cosmic Infrared Background ratio parameter | |
| n_Dl_cib | Planck Cosmic Infrared Background parameter | |
| cal_100 | Planck calibration parameter at 100GHz | |
| cal_143 | Planck calibration parameter at 143GHz | |
| cal_217 | Planck calibration parameter at 217GHz | |
| xi_sz_cib | Planck Cosmic Infrared Background parameter | |
| A_ksz | Planck kinetic Sunyaev-Zeldovich parameter | |
| Bm_1_1 | Planck beam parameter |
##Outputs
These parameters and data are computed as outputs from the module
| Section | Parameter | Description |
|---|---|---|
| likelihoods | planck_tt_high_like | Log-likelihood from Planck TT high-ell data |
| planck_tt_lopw_like | Log-likelihood from Planck TT low-ell data | |
| planck_p_low_like | Log-likelihood from Planck TT high-ell data | |
| planck_lensing_like | Log-likelihood from Planck lensing data | |
| planck_like | The total Planck log-likelihood; sum of the other values. |
Updated