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.
Planck revealed bulk motion of Centaurus A lobes / De Paolis, F.; Gurzadyan, V. G.; Nucita, A. A.; Ingrosso, G.; Kashin, A. L.; Khachatryan, H. G.; Mirzoyan, S.; Yegorian, G.; Jetzer, P.; Qadir, A.; Vetrugno, D.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 580:(2015), p. L8. [10.1051/0004-6361/201526797]
Planck revealed bulk motion of Centaurus A lobes
Vetrugno D.
2015-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
