Study of the variability of the nucleus of Centaurus A.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Variability: Radio Galaxies, Variability: Active Galactic Nuclei

Scientific paper

This work consists in the study of the variability of the nucleus of the peculiar galaxy NGC 5128 (Centaurus A) at the radio continuum frequency of 43 GHz. The data were obtained with the 13.7 m Itapetinga Radiotelescope. The radio source presents a pair of inner radio lobes and a compact variable nucleus. The observational technique used was scans through the inner radio lobes and the nucleus. The quasi-simultaneous measurements of the flux density of each source allowed the authors to derive accurately the relative flux between them, and to obtain the real variability of the nucleus.

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