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Relativistic Electron-Positron Clouds in VLBI Jets

Published online by Cambridge University Press:  25 May 2016

V. Despringre
Affiliation:
Observatoire Midi-Pyrénées 14 Avenue Edouard Belin, 31400 Toulouse, France Laboratoire d'Astrophysique de Grenoble BP53X, 38041 Grenoble Cédex, France
D. Fraix-Burnet
Affiliation:
Observatoire Midi-Pyrénées 14 Avenue Edouard Belin, 31400 Toulouse, France Laboratoire d'Astrophysique de Grenoble BP53X, 38041 Grenoble Cédex, France

Extract

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Extragalactic jets have always had two characteristics : the presence of knots and the requirement for particle acceleration. Shock fronts provide an explanation for both. However, the knotty appearance is less obvious at kp-scale on very high resolution observations from the VLA and the HST. The evidence for shock fronts is therefore weakened. At the pc-scale (or VLBI scale), a lot of these blobs are moving superluminally and they have been interpreted and modelled as shock fronts in a relativistic jet.

Type
Radio Source Modelling and Emission Mechanisms
Copyright
Copyright © Kluwer 1996