Multifrequency Radiation of Extragalactic Large-Scale Jets
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TLDR
In this paper, the authors summarize information about multiwavelength emission of the large-scale extragalactic jets, and point out several modifications of the standard jet radiation models (connected with relativistic bulk velocities, jet radial stratification and particle energization all the way along the jet), which can possibly explain some of the mentioned puzzling observations.Abstract:
Large-scale extragalactic jets, observed to extend from a few to a few hundred kiloparsecs from active galactic nuclei, are now studied over many decades in frequency of electromagnetic spectrum, from radio until (possibly) TeV γ rays. For hundreds of known radio jets, only about 30 are observed at optical frequencies. Most of them are relatively short and faint, with only a few exceptions, like 3C 273 or M 87, allowing for detailed spectroscopic and morphological studies. Somewhat surprisingly, the large-scale jets can be very prominent in X-rays. Up to now, about 30 jets were detected within the 1 - 10 keV energy range, although the nature of this emission is still under debate. In general, both optical and X-ray jet observations present serious problems for standard radiation models for the considered objects. Recent TeV observations of M 87 suggest the possibility of generating large photon fluxes at these high energies by its extended jet. In this paper we summarize information about multiwavelength emission of the large-scale jets, and we point out several modifications of the standard jet radiation models (connected with relativistic bulk velocities, jet radial stratification and particle energization all the way along the jet), which can possibly explain some of the mentioned puzzling observations. We also comment on γ-ray emission of the discussed objects.read more
Citations
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3C 273: A Star-like Object with Large Red-Shift
TL;DR: In this article, Maarten Schmidt solved the puzzle by recognizing the Balmer lines of hydrogen, strongly redshifted, in the spectrum of the quasar 3C 273, and reached the "most direct and least objectionable" conclusion, that 3c 273 was no star, but the enormously bright nucleus of a distant galaxy.
Journal ArticleDOI
On the Magnetic Field in the Kiloparsec-Scale Jet of Radio Galaxy M87
TL;DR: In this paper, the relativistic bulk velocity of the jet, as well as the Klein-Nishina effects, were analyzed for high-energy γ-ray emission of one particular object of this kind, i.e., the kiloparsec-scale jet of the M87 radio galaxy.
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Chandra Reveals Twin X-Ray Jets in the Powerful FR II Radio Galaxy 3C 353
Jun Kataoka,Ł. Stawarz,Ł. Stawarz,D. E. Harris,Aneta Siemiginowska,Michał Ostrowski,Mark R. Swain,Martin J. Hardcastle,J. L. Goodger,K. Iwasawa,Philip G. Edwards +10 more
TL;DR: In this paper, X-ray imaging of the FR II radio galaxy 3C 353 using the Chandra X-Ray Observatory has been reported, which is most likely nonthermal in origin, putting several crucial constraints on the Xray emission mechanisms in powerful large-scale jets of quasars and FR II sources.
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Deep WFPC2 and Ground-based Imaging of a Complete Sample of 3C Quasars and Galaxies
Susan E. Ridgway,Alan Stockton +1 more
TL;DR: The results of an HST and ground-based imaging study of a complete 3C sample of z ~ 1 sources, including 5 quasars and 5 radio galaxies, were presented in this paper.
References
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