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Low Frequency Radio Observations of Galaxy Clusters and Groups
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Fachbuch
2018

Low Frequency Radio Observations of Galaxy Clusters and Groups

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ISBN
EAN
978-3-319-97976-2
9783319979762
Artikel-Nr.
4VE2EGW
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-21.7
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This book uses new data from the very low radio frequency telescope LOFAR to analyse the magnetic structure in the giant radio galaxy NGC6251. This analysis reveals that the magnetic field strength in the locality of this giant radio galaxy is an order of magnitude lower than in other comparable systems. Due to the observational limitations associated with capturing such huge astrophysical structures, giant radio galaxies are historically a poorly sampled population of objects; however, their preferential placement in the more rarefied regions of the cosmic web makes them a uniquely important probe of large-scale structures. In particular, the polarisation of the radio emissions from giant radio galaxies is one of the few tools available to us that can be used to measure magnetic fields in regions where the strength of those fields is a key differentiator for competing models of the origin of cosmic magnetism. Low frequency polarisation data are crucial for detailed analyses of magnetic structure, but they are also the most challenging type of observational data to work with. This book presents a beautifully coupled description of the technical and scientific analysis required to extract valuable information from such data and, as the new generation of low frequency radio telescopes reveals the larger population of giant radio galaxies, it offers a significant resource for future analyses.

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Stichwörter
Inhaltsverzeichnis
Introduction.- Techniques and Data Calibration.- A Newly-Discovered Radio Halo in MACS J2243.3-0935.- GMRT Observations of Three Highly Disturbed Clusters.- LOFAR HBA Observations of NGC 6251.- Conclusions.

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Publikation
Schweiz
01.09.2018
Springer Verlag
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Sprache
Englisch
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eBook
PDF
134 Seiten
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