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A& A Supplement series, Vol. 121, January 1997, 11 - 14

Received June 8, 1995; accepted April 13, 1996

The large-scale radio spectral index distribution of Centaurus A

J.A. Combigif - G.E. Romerotex2html_wrap_inline765

Send offprint request: J.A. Combi
Instituto Argentino de Radioastronomía, C.C. 5, (1894) Villa Elisa, Prov. de Bs. As., Argentina


A spectral index map of Centaurus A (Cen A) has been computed using 408 MHz observations from the whole-sky survey by Haslam et al. (1981) and new 1435 MHz observations. The large-scale structure of the radio source is discussed in the light of these new data and a previous polarization survey. The observational evidence seems to support the expanding jet model for this source.

keywords: galaxies: individual: NGC 5128=Cen A -- galaxies: active -- radio continuum: galaxies

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