Planck revealed bulk motion of Centaurus A lobes

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 lo...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2015-08, Vol.580, p.L8
Main Authors: De Paolis, F., Gurzadyan, V. G., Nucita, A. A., Ingrosso, G., Kashin, A. L., Khachatryan, H. G., Mirzoyan, S., Yegorian, G., Jetzer, Ph, Qadir, A., Vetrugno, D.
Format: Article
Language:English
Subjects:
Active galaxies
Astronomy
Asymmetry
Bands
Dynamics
galaxies: general
galaxies: halos
galaxies: individual: Centaurus A
Indication
Line of sight
Lobes
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Summary: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.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201526797