WMAP Galactic haze from Finkbeiner 2004

The haze map is orthogonal (by construction) to the other foreground templates (Haslam soft synchrotron, H-alpha for free-free, FIR dust emission) and therefore contains negative and positive regions. If the haze is indeed free-free, then the total free-free emission is the H-alpha based map plus the haze. Four maps are available:

A gzipped tar file is also available.

Copies of the haze maps exist in two formats:

table -- binary FITS tables in the WMAP format

simple -- simple FITS files

In all cases, files are HEALPix projections (Nside=512, ring order).

Read more about the haze:
"Microwave ISM Emission Observed by WMAP," D. P. Finkbeiner Oct 2004, ApJ, 614, 186 and astro-ph/0311547

Speculation that the haze is synchrotron emission from cosmic-ray particles produced by dark matter annihilation:
"WMAP Microwave Emission Interpreted as Dark Matter Annihilation in the Inner Galaxy" D. P. Finkbeiner 2005, astro-ph/0409027

Find out more about: WMAP

Douglas Finkbeiner, dfink@astro.princeton.edu