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High Frequency Observations of a Large Faraday Rotation Galaxy in a Cluster

Published online by Cambridge University Press:  19 July 2016

M. Inoue ,
H. Tabara ,
T. Kato  and
K. Aizu
M. Inoue
Affiliation:
Nobeyama Radio Observatory, Nobeyama, Minamisaku, Nagano 384-13, Japan
H. Tabara
Affiliation:
∗Utsunomiya University, Utsunomiya, Tochigi 321, Japan
T. Kato
Affiliation:
∗Utsunomiya University, Utsunomiya, Tochigi 321, Japan
K. Aizu
Affiliation:
†Katahira 3-24-3, Asao-ku, Kawasaki 215, Japan

Extract

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We present 22 and 49 GHz interferometric observations of Hyd A (3C218). The source was found to have a very large Faraday rotation measure (RM) (Kato et al. 1987), and to be a dominant member of a luminous X-ray cluster with a large cooling flow (David et al. 1988). These characteristics are very similar to those of Cyg A which is suggested to produce a large RM within a dense sheath around the radio lobes as a result of somehow an interaction between dense intracluster medium (ICM) and radio jets and/or lobes (Dreher et al. 1987). Hyd A is the second example of Cyg A type source. In case of Cyg A, hot spots are the place where the interaction between jets and ICM occurs (Carilli et al. 1988). We then expect in Hyd A that similar interaction also occurs to form hot spots, and consequently that high frequency observations reveal structures of the interaction.

Type
9. Magnetic Fields in the Galactic Environment, Galaxy Clusters and Intergalactic Medium
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 486
Copyright
Copyright © Kluwer 1990 

References

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Dreher, J.W., Carilli, C.L. and Perley, R.A. 1987, Ap. J. , 316, 611.CrossRefGoogle Scholar
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