Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-14
Astronomy and Astrophysics
Astrophysics
4 pages, 6 figures, Contribution to the Proceedings of "X-ray and Radio Connections", Santa Fe (NM) 3-6 February, 2004, eds. S
Scientific paper
We present VLA data at 330 MHz and 1.5 GHz of the radio emission observed in the cooling flow cluster A2626. By producing images at different resolutions we found that the radio source consists of different components: an unresolved core plus a jet-like feature, two elongated parallel features, and an extended diffuse emission (radio mini-halo). Low resolution images allow us to derive morphological and spectral information of the diffuse emission: the radio mini-halo is extended on a scale comparable to that of the cooling flow region and is characterized by amorphous morphology, lack of polarized flux and very steep spectrum which steepens with distance from the center. We then applied to this new mini-halo source a model for particle re-acceleration in cooling flows (Gitti, Brunetti & Setti 2002). In particular, we found that its main radio properties (brightness profile, integrated radio spectrum and radial spectral steepening) can be accounted for by the synchrotron radiation from relic relativistic electrons in the cluster, which are efficiently re-accelerated by MHD turbulence amplified by the compression of the cluster magnetic field in the cooling flow region.
No associations
LandOfFree
The cooling flow cluster Abell 2626 and the associated radio emission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The cooling flow cluster Abell 2626 and the associated radio emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The cooling flow cluster Abell 2626 and the associated radio emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-671170