Open AccessSpectral index determination between 408 MHz and 5 GHz in the northern sky
Author(s) -
Jones A.W.,
Davis R.J.,
Wilkinson A.,
Giardino G.,
Melhuish S.J.,
Asareh H.,
Davies R.D.,
Lasenby A.N.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04771.x
Subject(s) - physics , sky , spectral index , interferometry , astrophysics , astronomy , latitude , index (typography) , remote sensing , spectral line , geography , world wide web , computer science
We present the joint analysis of two 5‐GHz interferometric surveys of the northern sky, taken with different baselines. The two surveys were carried out on the Jodrell Bank 5‐GHz interferometer based at Manchester. The Maximum Entropy Method is used to check the consistency of the two surveys and the final two‐dimensional maps are used, together with low‐frequency full sky surveys, to put constraints on the Galactic spectral index. It is found that synchrotron emission is the dominant process at high Galactic latitudes below 5 GHz.