Nearby Radio Galaxies PDF Download
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Author: R. A. Cordey
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: R. A. Cordey
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Bjornie Hendrikus Cornelius Emonts
Publisher:
ISBN: 9789036728539
Category :
Languages : en
Pages :
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Author: Thérèse Cantwell
Publisher: Springer
ISBN: 3319979760
Category : Science
Languages : en
Pages : 151
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Book Description
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.
Author: Dorit Glawion
Publisher: MDPI
ISBN: 3039287508
Category : Science
Languages : en
Pages : 188
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Book Description
It is common believe that the centers of all galaxies exhibit supermassive black holes with masses ranging from millions up to billions of the mass of our Sun. By accreting surrounding matter, the luminosity of these galactic nuclei can outshine the emission of their host galaxies. If this is the case, they are called active galactic nuclei. Some of these objects eject powerful outflows composed of plasma, called jets. These jets can produce non-thermal radiation which observable across the entire electromagnetic spectrum from radio up to the gamma-ray frequencies. At highest frequencies (TeV range) most of the detected active galaxies have jets directed along or close to the line of sight. However, also galaxies with larger angles to the line of sight showing fascinating features were discovered, in seeming contradiction to traditional models for these so-called radio galaxies. Thus, the latter are of particular importance for understanding active galactic nuclei in general. This Special Issue contains reviews and research articles about the current knowledge of radio galaxies at TeV energies, including observational results and theoretical models. It is intended to guide the interested reader deeper into this fascinating discipline of modern day astronomy.
Author: Bjorn Emonts
Publisher:
ISBN:
Category : Active galactic nuclei
Languages : en
Pages : 222
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Book Description
"Gas, star formation and active nucleus: a thesis summary" p. [189]-197.
Author: Xuan Thuan Trinh
Publisher: Atlantica Séguier Frontières
ISBN: 9782863321249
Category : Astrophysics
Languages : en
Pages : 558
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Author:
Publisher:
ISBN: 9789463803793
Category :
Languages : en
Pages : 180
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Book Description
Author: C. L. Carilli
Publisher: Cambridge University Press
ISBN: 9780521553438
Category : Science
Languages : en
Pages : 314
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Book Description
A comprehensive and up-to-date review of Cygnus A and what it can teach us about other active galaxies - for graduate students and researchers.
Author: Wolfgang Priester
Publisher:
ISBN:
Category : Quasars
Languages : en
Pages : 68
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Book Description
Author: L. Tacconi
Publisher: Springer Science & Business Media
ISBN: 3642565387
Category : Science
Languages : en
Pages : 349
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Book Description
A major fraction of star formation in the universe occurs in starbursts. These regions of particularly rapid star formation are often located towards the centers of host galaxies. Studies of this kind of star formation at high redshift have produced astonishing results over recent years that were only possible with the latest generation of large ground-based and space telescopes. The papers collected in this volume present these results in the context of the much firmer foundation of star formation in the local universe, and they emphasize all the important topics, from star formation in different environments to the cosmic star formation history.
