Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249...40h&link_type=abstract
Astrophysical Journal, Part 1, vol. 249, Oct. 1, 1981, p. 40-47.
Astronomy and Astrophysics
Astronomy
44
Atmospheric Refraction, Elliptical Galaxies, Intergalactic Media, Radio Jets (Astronomy), Static Pressure, Astronomical Models, Buoyancy, Galactic Clusters, Jets, Pressure Gradients, Self Consistent Fields
Scientific paper
A theory based on the refraction of radio jets in the extended atmosphere of an elliptical galaxy, is proposed for double radio sources with a Z or S morphology. The model describes a collimated jet of supersonic material that bends self-consistently under the influence of external static pressure gradients, and may alternatively be seen as a continuous-jet version of the buoyancy model proposed by Gull (1973). Emphasis is placed on (1) S-shaped radio sources identified with isolated galaxies, such as 3C 293, whose radio structures should be free of distortions resulting from motion relative to a cluster medium, and (2) small-scale, galaxy-dominated rather than environment-dominated S-shaped sources such as the inner jet structure of Fornax A.
Bridle Alan H.
Henriksen Richard N.
Vallee Jacques P.
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