Abstract
THE origin of the absorption lines in QSOs, with Zabs ≪ Zem has remained a puzzle. It has been suggested that they result from intervening matter lying along the line of sight but not associated with the QSO1,2. It has also been suggested that the absorption lines arise ‘locally’ from matter expelled from the QSO core3–6. In particular, radiation pressure has been proposed as the driving mechanism3–5. It has, however, been shown that the final velocities required by the expelled matter (vf ∼ c) for Zabs to be ≪ Zem, cannot be attained by radiation pressure7. Alternatively, matter could be accelerated to velocities Vf ∼ c by free electron scattering in the outer region of the QSO core7.
Published Version
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