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Cosmic rays in magnetized intracluster plasma

Published online by Cambridge University Press:  21 October 2010

L. Feretti ,
A. Bonafede ,
G. Giovannini ,
F. Govoni  and
M. Murgia
L. Feretti
Affiliation:
Istituto di Radioastronomia INAF, Via Gobetti 101, 40129 Bologna, Italy
A. Bonafede
Affiliation:
Istituto di Radioastronomia INAF, Via Gobetti 101, 40129 Bologna, Italy
G. Giovannini
Affiliation:
Istituto di Radioastronomia INAF, Via Gobetti 101, 40129 Bologna, Italy Dipart. Astronomia, Univ. Bologna, Via Ranzani 1, 40127 Bologna, Italy
F. Govoni
Affiliation:
Oss. Astronomico Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), Italy
M. Murgia
Affiliation:
Oss. Astronomico Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), Italy
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A breakthrough in the studies of magnetic fields in clusters of galaxies has been reached in recent years from the analysis of the Rotation Measure of sources seen through the magnetized cluster medium (Govoni & Feretti 2004). The results obtained can be summarized as follows: (i) magnetic fields are present in all clusters; (ii) at the center of clusters undergoing merger activity the field strenght is around 1 μG, whereas at the center of relaxed cooling core clusters the intensity is much higher (~ 10 μG); (iii) a model involving a single magnetic field coherence scale is not suitable to describe the observational data, because of different scales of field ordering and tangling.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 459 - 460
Copyright
Copyright © International Astronomical Union 2010

References

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