English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a Bayesian maximum likelihood analysis of Faraday rotation measure(RM) maps of extended radio sources to determine magnetic field power spectrain clusters of galaxies. Using this approach, it is possible to determine theuncertainties in the measurements. We apply this approach to the RM map ofHydra A and derive the power spectrum of the cluster magnetic field. For HydraA, we measure a spectral index of -5/3 over at least one order of magnitudeimplying Kolmogorov type turbulence. We find a dominant scale of about 3 kpc onwhich the magnetic power is concentrated, since the magnetic autocorrelationlength is lambda_B = 3 +/- 0.5 kpc. Furthermore, we investigate the influencesof the assumption about the sampling volume (described by a window function) onthe magnetic power spectrum. The central magnetic field strength was determinedto be about 7 +/- 2 muG for the most likely geometries.Comment: 11 pages, 8 figures, accepted for publication in A&

A Bayesian view on Faraday rotation maps – Seeing the magnetic power spectra in galaxy clusters