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Magnetic fields in galaxy clusters can be investigated using a variety of techniques. Recent studies including radio halos, Inverse Compton hard X-ray emissions and Faraday rotation measure, are briefly outlined. A numerical approach for…

天体物理学 · 物理学 2007-05-23 Federica Govoni , Matteo Murgia

The simulations of the formation of cosmological structure allows to determine the spatial inhomogeneity of cosmic magnetic fields. Such simulations, however, do not give an absolute number for the strength of the magnetic field due to…

天体物理学 · 物理学 2007-05-23 Peter L. Biermann , Hyesung Kang , Joerg P. Rachen , Dongsu Ryu

Observations of magnetic fields on scales up to several Mpc are important for understanding cluster and large-scale structure evolution. Our current census of such structures is heavily biased -- towards fields of several microG, towards…

天体物理学 · 物理学 2015-06-24 Lawrence Rudnick

We review the present theoretical and numerical understanding of magnetic field amplification in cosmic large-scale structure, on length scales of galaxy clusters and beyond. Structure formation drives compression and turbulence, which…

宇宙学与河外天体物理 · 物理学 2018-11-28 J. Donnert , F. Vazza , M. Brüggen , J. ZuHone

A brief overview about our knowledge on galaxy cluster magnetic fields is provided. Emphasize is given to the mutual dependence of our knowledge on relativistic particles in galaxy clusters and the magnetic field strength. Furthermore, we…

天体物理学 · 物理学 2007-05-23 Torsten A. Ensslin , Corina Vogt , Christoph Pfrommer

Cosmology, high-energy physics and astrophysics are converging on the study of large-scale magnetic fields. While the experimental evidence for the existence of large-scale magnetization in galaxies, clusters and superclusters is rather…

天体物理学 · 物理学 2009-11-10 Massimo Giovannini

The existence of magnetic fields associated with the intracluster medium in clusters of galaxies is now well established through different methods of analysis. The most detailed evidence for the presence of cluster magnetic fields comes…

天体物理学 · 物理学 2009-11-11 Federica Govoni

After a short introduction on how we get information of the magnetic fields from radio observations I discuss the results concerning the magnetic field structure in galaxies: Large-scale regular magnetic field pattern of spiral structure…

天体物理学 · 物理学 2007-05-23 M. Krause

The main motivations and challenges related with the physics of large-scale magnetic fields are briefly analyzed. The interplay between large-scale magnetic fields and scalar CMB anisotropies is addressed with specific attention on recent…

天体物理学 · 物理学 2008-11-26 Massimo Giovannini

We are developing a new approach to investigate cluster magnetic field strengths and structures. It is based on the comparison of simulated Rotation Measure and radio halo images, obtained from 3-dimensional multi-scale cluster magnetic…

天体物理学 · 物理学 2007-05-23 F. Govoni , L. Feretti , M. Murgia , G. B. Taylor , G. Giovannini , D. Dallacasa

Different mechanisms which may possibly explain existence of magnetic fields on astronomically large scales are described. A recently suggested model of magnetic fields generation slightly before hydrogen recombination is discussed in more…

天体物理学 · 物理学 2007-05-23 A. D. Dolgov

Radio observations of galaxy clusters show that there are $\mu$G magnetic fields permeating the intra-cluster medium (ICM), but it is hard to accurately constrain the strength and structure of the magnetic fields without the help of…

宇宙学与河外天体物理 · 物理学 2015-06-11 Hao Xu , Federica Govoni , Matteo Murgia , Hui Li , David C. Collins , Michael L. Norman , Renyue Cen , Luigina Feretti , Gabriele Giovannini

We consider the possibility that cosmic magnetic field, instead of being uniformly distributed, is strongly correlated with the large scale structure of the universe. Then, the observed rotational measure of extra-galactic radio sources…

天体物理学 · 物理学 2011-07-19 Dongsu Ryu , Hyesung Kang , Peter L. Biermann

In this review, I will first introduce possible methods to probe the large-scale magnetic fields in our Galaxy and discuss their limitations. The magnetic fields in the Galactic halo, mainly revealed by the sky distribution of rotation…

天体物理学 · 物理学 2007-05-23 J. L. Han

This is a review of the status of efforts to model the large-scale Galactic magnetic field (GMF). Though important for a variety of astrophysical processes, the GMF remains poorly understood despite some interesting new tracers being used…

星系天体物理 · 物理学 2019-05-14 Tess R. Jaffe

Cosmic structures at large scales represent the earliest and most extended form of matter condensation. In this lecture we review the application of the methods and concepts of modern statistical physics to these structures. This leads to a…

天体物理学 · 物理学 2017-08-23 Luciano Pietronero , Francesco Sylos Labini

The forthcoming new-generation radio telescope SKA (Square Kilometre Array) and its precursors will provide a rapidly growing number of polarized radio sources. Our analysis aims on what can be learned from these sources concerning the…

天体物理学 · 物理学 2009-11-13 Rodion Stepanov , Tigran G. Arshakian , Rainer Beck , Peter Frick , Marita Krause

The growing sample of magnetic stars shows a remarkable diversity in the properties of their magnetic fields. The overall goal of current studies is to understand the origin, evolution, and structure of stellar magnetic fields in stars of…

太阳与恒星天体物理 · 物理学 2019-10-16 Swetlana Hubrig , Markus Schöller

Magnetic fields are an energetically important component of star-formation galaxies, but it is often difficult to measure their properties from observations. One of the complexities stems from the fact that the magnetic fields, especially…

星系天体物理 · 物理学 2024-08-09 Amit Seta , Christoph Federrath

We review the observational and theoretical constraints on extragalactic magnetic fields across cosmic environment. In the next decade, the combination of sophisticated numerical simulations and various observational probes might succeed in…

宇宙学与河外天体物理 · 物理学 2016-11-02 Franco Vazza
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