Volume 580, August 2015
|Number of page(s)||4|
|Published online||11 August 2015|
Planck revealed bulk motion of Centaurus A lobes
Dipartimento di Matematica e Fisica “E. De Giorgi”Università del
via per Arnesano,
2 INFN, Sez. di Lecce, via per Arnesano, 73100 Lecce, Italy
3 Center for Cosmology and Astrophysics, Alikhanian National Laboratory and and Yerevan State University, Yerevan, Armenia
4 Physik-Institut, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
5 School of Natural Sciences, National University of Sciences and Technology, Islamabad, Pakistan
6 Department of Physics, University of Trento and TIFPA/INFN 38123 Povo, Trento, Italy, 38123 Povo, Italy
Received: 20 June 2015
Accepted: 20 July 2015
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.
Key words: galaxies: general / galaxies: individual: Centaurus A / galaxies: halos
© ESO, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.