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Title:
Magnetic fields in the centre of the Perseus cluster
Authors:
Taylor, G. B.; Gugliucci, N. E.; Fabian, A. C.; Sanders, J. S.; Gentile, G.; Allen, S. W.
Affiliation:
AA(Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA; National Radio Astronomy Observatory, Socorro, NM 87801, USA), AB(National Radio Astronomy Observatory, Socorro, NM 87801, USA; Department of Astronomy, University of Virginia, Charlottesville, VA 22903, USA), AC(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA), AD(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA), AE(Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA), AF(Kavli Institute of Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 368, Issue 4, pp. 1500-1506. (MNRAS Homepage)
Publication Date:
06/2006
Origin:
MNRAS
MNRAS Keywords:
accretion, accretion discs , galaxies: clusters: individual: Perseus , intergalactic medium , radio continuum: galaxies
DOI:
10.1111/j.1365-2966.2006.10244.x
Bibliographic Code:
2006MNRAS.368.1500T

Abstract

We present Very Long Baseline Array (VLBA) observations of the nucleus of NGC1275, the central, dominant galaxy in the Perseus cluster of galaxies. These are the first observations to resolve the linearly polarized emission from 3C84, and from them we determine a Faraday rotation measure (RM) ranging from 6500 to 7500radm-2 across the tip of the bright southern jet component. At 22GHz some polarization is also detected from the central pc of 3C84, indicating the presence of even more extreme RMs that depolarize the core at lower frequencies. The nature of the Faraday screen is most consistent with being produced by magnetic fields associated with the optical filaments of ionized gas in the Perseus cluster.

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