Magnetic Fields in the Hydra A Cluster

Details Magnetic Fields in the Hydra A Cluster Magnetic Fields in the Hydra A Cluster

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...416..554t&link_type=abstract

Astrophysical Journal v.416, p.554

Astronomy and Astrophysics

Astronomy

138

Galaxies: Intergalactic Medium, Galaxies: Clusters: Individual Name: Hydra A, Magnetic Fields, Polarization

Scientific paper

Sensitive, high-resolution VLA polarimetric observations are presented for the radio galaxy Hydra A, an outstanding example of a high-luminosity radio source embedded within a cooling flow cluster. We find extremely high Faraday rotation measures (RMs), throughout the central regions of this source, with a strong asymmetry between the north and south lobes. Simple models for the high RMs are discussed and compared with the observations. To explain the north-south asymmetry in RM requires a magnetic field of strength ˜6 μG organized over a scale of ˜100 kpc. On smaller scales we find a tangled magnetic field with a strength of 30 μG.

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