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相关论文: Structure of the magnetoionic medium around the FR…

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We investigate the magnetic field power spectrum in the cool core galaxy cluster A2199 by analyzing the polarized emission of the central radio source 3C338. The polarized radiation from the radio emitting plasma is modified by the Faraday…

宇宙学与河外天体物理 · 物理学 2015-06-03 V. Vacca , M. Murgia , F. Govoni , L. Feretti , G. Giovannini , R. A. Perley , G. B. Taylor

We present multi-frequency VLA observations of the two radio galaxies 3C 129 and 3C 129.1 embedded in a luminous X-ray cluster. These radio observations reveal a substantial difference in the Faraday Rotation Measures (RMs) toward 3C 129.1…

天体物理学 · 物理学 2009-09-17 G. B. Taylor , F. Govoni , S. A. Allen , A. C. Fabian

We present an analysis of the magnetic-field fluctuations in the magnetoionic medium in front of the radio galaxy 3C 31 derived from rotation-measure (RM) fits to high-resolution polarization images. We first show that the Faraday rotation…

天体物理学 · 物理学 2007-10-05 R. A. Laing , A. H. Bridle

The goal of this work is to put constraints on the strength and structure of the magnetic field in the cluster of galaxies A2382. We investigate the relationship between magnetic field and Faraday rotation effects in the cluster, using…

天体物理学 · 物理学 2009-11-13 D. Guidetti , M. Murgia , F. Govoni , P. Parma , L. Gregorini , H. R. de Ruiter , R. A. Cameron , R. Fanti

We present a numerical approach to investigate the relationship between magnetic fields and Faraday rotation effects in clusters of galaxies. We can infer the structure and strength of intra-cluster magnetic fields by comparing our…

天体物理学 · 物理学 2009-11-10 M. Murgia , F. Govoni , L. Feretti , G. Giovannini , D. Dallacasa , R. Fanti , G. B. Taylor , K. Dolag

Faraday rotation of radio source polarization provides a measure of the integrated magnetic field along the observational lines of sight. We compare a new, large sample of Faraday rotation measures (RMs) of polarized extragalactic sources…

天体物理学 · 物理学 2009-11-13 Yongzhong Xu , Philipp P. Kronberg , Salman Habib , Quentin W. Dufton

The goal of this work is to constrain the strength and structure of the magnetic field in the nearby cluster of galaxies A2255. At radio wavelengths A2255 is characterized by the presence of a polarized radio halo at the cluster center, a…

天体物理学 · 物理学 2009-11-11 F. Govoni , M. Murgia , L. Feretti , G. Giovannini , K. Dolag , G. B. Taylor

To search for a signature of an intracluster magnetic field, we compare measurements of Faraday rotation of polarised extragalactic radio sources in the line of sight of galaxy clusters with those outside. We correlated a catalogue of 1383…

宇宙学与河外天体物理 · 物理学 2016-12-07 Hans Boehringer , Gayoung Chon , Philipp P. Kronberg

The aim of the present work is to constrain the Coma cluster magnetic field strength, its radial profile and power spectrum by comparing Faraday Rotation Measure (RM) images with numerical simulations of the magnetic field. We have analyzed…

宇宙学与河外天体物理 · 物理学 2015-05-18 A. Bonafede , L. Feretti , M. Murgia , F. Govoni , G. Giovannini , D. Dallacasa , K. Dolag , G. B. Taylor

We use high-quality VLA images of the Fanaroff & Riley Class I radio galaxy 3C 31 at six frequencies in the range 1365 to 8440MHz to explore the spatial scale and origin of the rotation measure (RM) fluctuations on the line of sight to the…

天体物理学 · 物理学 2009-11-13 R. A. Laing , A. H. Bridle , P. Parma , M. Murgia

A514 contains six extended and polarized radio sources located at various projected distances from the cluster center. Here we present a detailed study of these six radio sources in total intensity and polarization using the Very Large…

天体物理学 · 物理学 2009-11-07 F. Govoni , G. B. Taylor , D. Dallacasa , L. Feretti , G. Giovannini

We present a detailed examination of the relationship between the magnetic field structures and the variations in Faraday Rotation across PKS1246-410, a radio source in the Centaurus cluster of galaxies, using data from Taylor, Fabian and…

天体物理学 · 物理学 2009-11-07 L. Rudnick , K. Blundell

To determine the properties of the Faraday screen and the magnetic field near the central region of the Galaxy, we measured the Faraday rotation measure (RM) towards 60 background extragalactic source components through the -6 deg < l <6…

天体物理学 · 物理学 2009-11-13 Subhashis Roy , A. Pramesh Rao , Ravi Subrahmanyan

Magnetic fields remain an enigmatic part of the content of galaxy clusters. Faraday rotation and depolarisation of extragalactic radio sources are useful probes, but the limited availability of polarised radio sources necessitates stacking…

We present new, multiwavelength Very Large Array observations of the 3 radio galaxies in the cluster Abell 119: 0053-015, 0053-016 and 3C 29. The first two radio galaxies, which lie close to the cluster center, show a narrow-angle-tailed…

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

Radio synchrotron emission, its polarization and its Faraday rotation are powerful tools to study the strength and structure of interstellar magnetic fields. The total intensity traces the strength and distribution of total magnetic fields.…

天体物理学 · 物理学 2009-11-13 Rainer Beck

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

We present detailed imaging of Faraday rotation and depolarization for the radio galaxies 0206+35, 3C 270, 3C 353 and M 84, based on Very Large Array observations at multiple frequencies in the range 1365 to 8440 MHz. This work suggests a…

宇宙学与河外天体物理 · 物理学 2015-05-27 D. Guidetti , R. A. Laing , A. H. Bridle , P. Parma , L. Gregorini

We present full-polarisation, broadband observations of the radio galaxy NGC 612 (PKS B0131-637) from 1.3 to 3.1 GHz using the Australia Telescope Compact Array. The relatively large angular scale of the radio galaxy makes it a good…

星系天体物理 · 物理学 2018-02-07 J. F. Kaczmarek , C. R. Purcell , B. M. Gaensler , X. Sun , S. P. O'Sullivan , N. M. McClure-Griffiths

Context. The existence of magnetic fields in the circumgalactic medium (CGM) is largely unconstrained. Their detection is important as magnetic fields can have a significant impact on the evolution of the CGM and, in turn, the fields can…

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