Radio galaxies in cooling clusters. The milliarcsecond properties of 3C 317

Astronomy and Astrophysics – Astronomy

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Scientific paper

3C 317 is a low luminosity radio galaxy, classified as FRI, associated with the cD galaxy UGC09799, at the centre of the cooling flow cluster of galaxies A2052. We observed this source with the VLBA simultaneously at three different frequencies: 1.6 GHz, 5 GHz and 8.4 GHz in polarimetric mode, in order to image the milliarcsecond structure of the source, and to carry out the spectral study of the various components. Our observations allow also the study of the magnetic field distribution and Rotation Measure. Here we present our preliminary results and discussion. We use H0 = 50 km s-1 Mpc-1, q0 = 0 and S ∝ ν-α throughout the paper. For 3C 317 1 mas ˜ 1 pc.

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