Spectral index determination between 408 MHz and 5 GHz in the northern sky |
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| Authors: | AW Jones RJ Davis A Wilkinson G Giardino SJ Melhuish H Asareh RD Davies AN Lasenby |
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| Institution: | 1Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE;2University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL |
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| Abstract: | 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. |
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| Keywords: | radiation mechanisms: general surveys cosmic microwave background cosmology: observations radio continuum: general radio continuum: ISM |
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