High energy emission from AGN cocoons in clusters of galaxies
نویسندگان
چکیده
منابع مشابه
High energy emission from AGN cocoons in clusters of galaxies
Gamma-ray emission from cocoons of young radio galaxies is predicted. Considering the process of adiabatic injection of the shock dissipation energy and mass of the relativistic jet into the cocoon, we find that the thermal electron temperature of the cocoon is typically predicted to be of the order of ∼ MeV, and is determined only by the bulk Lorentz factor of the jet. Together with the time-d...
متن کاملHigh Energy X-Ray Emission in Clusters of Galaxies
Observations with the RXTE and SAX satellites have recently led to the measurement of a second component in the spectra of several clusters of galaxies which are known to have regions of extended radio emission. This new component is quite likely nonthermal emission resulting from Compton scattering of relativistic electrons by the cosmic microwave background. The nonthermal X-ray and radio mea...
متن کاملAgn Models: High-energy Emission
Astrophysical models for the high-energy emission of blazars are reviewed. Blazars ejecting relativistic radio jets at small angles to the line-of-sight are the only type of active galactic nuclei (AGN) discovered above 100 MeV. The γ-rays apparently originate in the jets which explains the absence of γ-ray pair creation attenuation. The bulk Lorentz factor of the radio jets is much smaller tha...
متن کاملAGN Zoo and Classications of Active Galaxies
We review the variety of Active Galactic Nuclei (AGN) classes (so-calledAGN zoo") and classification schemes of galaxies by activity types based on their optical emission-line spectrum, as well as other parameters and other than optical wave-length ranges. A historical overview of discoveries of various types of active galaxies is given, including Seyfert galaxies, radio galaxies, QSOs, BL Lace...
متن کاملHigh Energy Emission from Agn and Unified Schemes
Active Galactic Nuclei (AGN) are now known to be strong γ-ray emitters. After briefly describing AGN classification and the main ideas behind unified schemes, I summarize the main properties of blazars (that is BL Lacs and flatspectrum radio quasars) and their connection with relativistic beaming. Finally, I address the question of why blazars, despite being extreme and very rare objects, are t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2009
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.200811170