Wayne A. Christiansen

The radio properties of the broad-absorption-line QSOs

A VLA radio detection survey has been conducted for a large sample of broad-absorption-line (BAL) QSOs. Together with results from a similar, previous survey and a few observations from two other surveys, 68 BALQSOs have now been well observed with no strong radio sources detected. The absence of luminous radio sources among 68 known BALQSOs reported here, together with a complementary spectroscopic study which finds no BALQSOs among a large sample of radio-loud quasars, establishes a strong anticorrelation between luminous radio sources and the BALQSO phenomenon

Energetics and morphology of radio tail galaxies

The energetics of the multiple ejection plasmon (plasmoid) model of a radio tail source is in full agreement with the observed luminosity of the entire tail for time scales required by observations of typical tail sources such as, e.g., NGC 1265. Furthermore, the inclusion of the effects of an interstellar medium as suggested by Jones and Owen assures the agreement between the observed morphological structure and that predicted by the multiple ejection plasmon model.