Alternating ejection in radio-loud quasars?

Astronomy and Astrophysics – Astronomy

Scientific paper

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Ejection, Extragalactic Radio Sources, Quasars, Radio Astronomy, Astronomical Models, Statistical Analysis, Very Large Array (Vla)

Scientific paper

A sample of radio quasars mapped at the Very Large Array has been used to test the hypothesis that ejection of material in extragalactic radio sources occurs on only one side at a time. This hypothesis, most recently put forward by Rudnick (1982), predicts a deficit of double sources having their two outer radio lobes at equal distances from the radio core. Such a deficit is not confirmed in the authors' sample of 47 quasars containing triple radio sources. The statistics imply that alternation of ejection direction is not the dominant effect in determining relative distances from the core to the radio lobes in the majority of quasars; factors such as nonuniformities in the intergalactic medium may be more important.

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