Evolution and structure of magnetic fields in simulated galaxy clusters

Simple item page
dc.creatorDolag, Klaus
dc.creatorBartelmann, Matthias
dc.creatorLesch, Harald
dc.date2002-02-14
dc.date.accessioned2026-07-07T11:28:52Z
dc.date.available2026-07-07T11:28:52Z
dc.descriptionWe use cosmological magneto-hydrodynamic simulations to study the evolution of magnetic fields in galaxy clusters in two different cosmological models, a standard-CDM and a $Λ$-CDM model. We show that the magnetic field strength profiles closely follow the cluster density profiles outside a core region of radius $\sim200\kpc$. The magnetic field has a correlation length of order $50\kpc$ and reverses on scales of $\sim100\kpc$ along typical lines-of-sight. The power spectrum of the magnetic field can well be approximated by a steep power law with an exponent of $\sim-2.7$. The mean magnetic field in the cluster cores grows roughly exponentially with decreasing redshift, $B\sim10^{-2.5z} \muG$. Merger events have a pronounced effect on magnetic field evolution, which is strongly reflected in measurable quantities like the Faraday rotation. The field evolution in the two different cosmologies proceeds virtually identically. All our cluster models very well reproduce observed Faraday rotation measurements when starting with nG seed fields.
dc.description13 pages, 10 figures, accepted for publication in Astronomy and Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/0202272
dc.identifierhttp://arxiv.org/abs/astro-ph/0202272
dc.identifierAstron.Astrophys.348:351,1999
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196536
dc.subjectAstrophysics
dc.titleEvolution and structure of magnetic fields in simulated galaxy clusters
dc.typetext

Files

Collections

arXiv