Journal article · Preprint article
Planck Intermediate Results. IX. Detection of the Galactic haze with Planck : IX. Detection of the Galactic haze with Planck
Using precise full-sky observations from Planck, and applying several methods of component separation, we identify and characterize the emission from the Galactic "haze" at microwave wavelengths. The haze is a distinct component of diffuse Galactic emission, roughly centered on the Galactic centre, and extends to |b| ~35 deg in Galactic latitude and |l| ~15 deg in longitude.
By combining the Planck data with observations from the WMAP we are able to determine the spectrum of this emission to high accuracy, unhindered by the large systematic biases present in previous analyses. The derived spectrum is consistent with power-law emission with a spectral index of -2.55 +/- 0.05, thus excluding free-free emission as the source and instead favouring hard-spectrum synchrotron radiation from an electron population with a spectrum (number density per energy) dN/dE ~ E^-2.1.
At Galactic latitudes |b|
Language: | English |
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Publisher: | EDP Sciences |
Year: | 2013 |
Pages: | A139 |
ISBN: | 0367152290 , 1138222984 , 1315406284 , 1315406292 , 1315406306 , 9780367152291 , 9781138222984 , 9781315406282 , 9781315406299 and 9781315406305 |
ISSN: | 14320746 and 00046361 |
Types: | Journal article and Preprint article |
DOI: | 10.1051/0004-6361/201220271 |
ORCIDs: | 0000-0003-4213-1300 , 0000-0002-8891-0273 , Hornstrup, Allan , Linden-Vørnle, Michael and Nørgaard-Nielsen, Hans Ulrik |