Wilkinson Microwave Anisotropy Probe DR5MCMC Foreground MapsCoordinate System:
Galactic
Projection Type:
HEALPix, nested, res 6 (Nside=64)
Resolution:
1^{°}
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These maps were generated from the MCMC fit described in Gold, et.al.. The inputs are the one degree smoothed maps per frequency band, binned to Nside=64. There is an MCMC chain for each pixel which is used to estimate the likelihood for all the parameters. The maps provided for each parameter are:
Four sets of maps are provided: MCMC Models c, e, f and g as described in Bennett et. al (2013). Each model has a slightly different set of parameters that are allowed to vary. Model c ('base') assumes a powerlaw dependence for synchrotron, freefree, and dust, where the synchrotron and dust spectral indices are free parameters. Model e ('sd070') includes synchrotron, freefree, thermal dust emission, and a spinning dust component. The synchrotron spectral index is fixed to 3. The spinning dust spectrum is fixed to the Cold Neutral Medium spectral form from Silsbee, etal, 2011 with a peak frequency shift parameter of 0.7. Model f ('bsfree sd084') is similar to Model e, but allows the synchrotron spectral index to vary per pixel (a pure power law is assumed). The spinning dust spectrum uses a fixed shift parameter of 0.84. Model g ('bsfree Strong sd084') is similar to Model f, but constrains the synchrotron spectral index behavior with frequency to follow that specified in Strong, etal, 2011 instead of a pure power law. The following parameters are reported:
Temperatures in mK are in antenna units except for the CMB maps, which are provided in thermodymanic units. The reduced χ^{2} are the bestfit χ^{2} divided by the number of degrees of freedom determined from the chain using the "effective complexity". Additional Information
