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Evidence of gas heating by the central AGN in MKW 3s
Author(s) -
Giacintucci S.,
Mazzotta P.,
Brunetti G.,
Venturi T.,
Bardelli S.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610594
Subject(s) - giant metrewave radio telescope , physics , astrophysics , radius , cluster (spacecraft) , galaxy cluster , magnetic field , radiative transfer , astronomy , radio telescope , galaxy , radio galaxy , optics , computer security , quantum mechanics , computer science , programming language
We present the results of radio observations of the galaxy cluster MKW 3s carried out at 1.28 GHz and 610 MHz with the Giant Metrewave Radio Telescope (GMRT). The Chandra observations of MKW 3s revealed that this cluster is characterized by a complex X‐ray structure hosting both a X‐ray .lament and a X‐ray cavity. The temperature structure of the cluster core is even more complex, with the presence of extended regions of gas heated above the radially averaged gas temperature at any radius. The magnetic field derived from the radio observations is ∼ 2 μG and provides radiative ages of the order of ∼ 2 × 10 8 yrs. Thanks to this estimate of the magnetic field strength and the comparison between the radio structure and the Chandra data, we found clear evidence for a close connection between the radio activity of the central AGN and the heated gas regions in this cluster. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)