Planck revealed bulk motion of Centaurus A lobes
Nucita, A. A.; De Paolis, F.; Ingrosso, G.; Vetrugno, D.; Gurzadyan, V. G.; Qadir, A.; Kashin, A. L.; Khachatryan, H. G.; Yegorian, G.; Jetzer, Ph.; Mirzoyan, S.
Italy, Armenia, Switzerland, Pakistan
Abstract
Planck data towards the active galaxy Centaurus A are analyzed in the 70, 100 and 143 GHz bands. We find a temperature asymmetry of the northern radio lobe with respect to the southern one that clearly extends at least up to 5° from the Cen A center and diminishes towards the outer regions of the lobes. That transparent parameter - the temperature asymmetry - thus has to carry a principal information, i.e. indication on the line-of-sight bulk motion of the lobes, while the increase of that asymmetry at smaller radii reveals the differential dynamics of the lobes as expected at ejections from the center.