The Spectral Index of the Galactic Foreground Affecting CMB Measurements
Abstract
A precise knowledge of spatial distribution, level and frequency spectrum of the Galactic Diffuse Background is essential in measurements of the CMB to subtract its contribution to the sky signal collected by the antenna. Because data in literature do not have the necessary accuracy, CMB observation must include ad hoc measurements of the galactic foreground. We present new measurements of the spectral index of the galactic diffuse radiation between 0.6 and 2.5 GHz made by TRIS, a set of three radiometers we use to look for deviations from a Planck distribution in the spectrum of the CMB at frequencies close to 1 GHz.
- Publication:
-
New Cosmological Data and the Values of the Fundamental Parameters
- Pub Date:
- 2005
- Bibcode:
- 2005IAUS..201..538Z