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Magnetic Fields in the Hydra A Cluster
Abstract
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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Citations
Cited by
Astrophysical magnetic fields and nonlinear dynamo theory
Brandenburg, A., & Subramanian, K. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.06.005 · Cited by 1,640
Clusters of galaxies: observational properties of the diffuse radio emission
Feretti, L., Giovannini, G., Govoni, F., & Murgia, M. (2012) · The Astronomy and Astrophysics Review · doi:10.1007/s00159-012-0054-z · Cited by 667
MAGNETIC FIELDS IN CLUSTERS OF GALAXIES
GOVONI, F., & FERETTI, L. (2004) · International Journal of Modern Physics D · doi:10.1142/s0218271804005080 · Cited by 486
Milestones in the Observations of Cosmic Magnetic Fields
Han, J.-L., & Wielebinski, R. (2002) · Chinese Journal of Astronomy and Astrophysics · doi:10.1088/1009-9271/2/4/293 · Cited by 84
“The central density-enhanced “cooling flow” regions can have magnetic fields up to ∼40µG with coherence scales up to ∼50kpc (Taylor & Perley 1993).”
Background
Metadata
- Authors
- Taylor, G. B., & Perley, R. A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1993-10
- Volume
- 416
- Pages
- 554
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2082899588
- Cited by
- 168
- References
- 0
- FWCI
- 2.40
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Magnetic Fields in the Hydra A Cluster. https://app.cochat.ai/papers/10.1086/173257
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- Taylor, G. B., & Perley, R. A. (1993). Magnetic Fields in the Hydra A Cluster. The Astrophysical Journal. https://doi.org/10.1086/173257
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