Multiwavelength Studies of Active Galaxies

Dear Colleagues,

Active galaxies, which would include the active galactic nuclei (AGN), as well as the extragalactic jets which often attend them, are fascinating objects that tell us much about several different topics. Studying such active galaxies can tell us about the intergalactic medium, the nature of the jets themselves, galactic evolution, and even the state of the early universe, as we are observing here high redshift objects with large look-back times.

Much of the information to be gleaned is from different wavelengths, and, indeed, often is only understood when a multiwavelength campaign is initiated. Thus, collaboration with many others, over many wavelengths, is necessary. The wavelength coverage is often enormous, stretching from radio to very high energy TeV gamma radiation. Such spectral information is important in the understanding of the radiation mechanisms of the jets (typically synchrotron and inverse-Compton), and spectral ageing, as well as the location of instabilities and other morphologies of the accretion disk itself (through reverberation mapping and cross correlation of light curves over different wavelengths). In this Special Issue, we intend to invite front-line researchers and authors to submit original research or review articles on multiwavelength studies of active galaxies.

Prof. Alberto Sadun
Guest Editor

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