NGC4235 appears to be another highly probable case of a Seyfert galaxy ejecting higher redshift AGN's in opposite directions from its nucleus. As such it is an important confirmation of this physical process. One of the ejecta is a BL Lac object
which confirms the relation of this particularly active kind of quasar to Seyfert galaxies. Both the BL Lac and the quasar have fainter candidates around them which are highly suggestive of more recent, secondary ejections.
The high redshift AGN's are closely aligned along the minor axis of NGC4235. Comparison with other available examples supports preferential ejection of such objects along the minor axes of Seyferts. In one new example, quasar candidates are listed which are close to NGC2639, directly along its minor axis.
It would seem to be of the highest priority to observe these new objects in order to obtain empirical data on the nature of the ejection mechanism and clues to possible explanations for the intrinsic redshift of the ejected material.
© European Southern Observatory (ESO) 1997
Online publication: March 26, 1998