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A Suggested Classification and Explanation for Hotspots in Some Powerful Radio Sources

Published online by Cambridge University Press:  14 August 2015

P. P. Kronberg  and
T. W. Jones
P. P. Kronberg
Affiliation:
University of Toronto, Scarborough College and David Dunlap Observatory
T. W. Jones
Affiliation:
Department of Astronomy, University of Minnesota

Extract

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High resolution (1′→0′.1) maps of the outer complexes of some “well formed” powerful radio sources suggest that we can now distinguish two physically distinct types of outer hotspots. We denote them as type “A” and “B” and describe them as follows: Type A hotspots, illustrated in Figure 1, occur at the outer leading edge, and have a cusp-like, or otherwise elongated shape. This strongly suggests that their shape and energy density are determined by the ram-pressure interaction between the end of a beam or momentum flux “pipeline”, and the ambient i.g.m. Magnetic fields appear well-ordered along the cusp (Laing, 1981). The surface brightness of well-resolved Type A hotspots leads to a velocity of advance (Va) which is typically 103→104 (ρ−1ig-27)km/s (ignoring the ion energy).

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 157 - 160
Copyright
Copyright © Reidel 1982 

References

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