Ongoing Star Formation in the BL Lacertae object PKS 2005-489
  We present VLT long slit optical spectroscopy of the luminous BL Lacertae object PKS 2005-489. The high signal-to-noise ratio and the good spatial resolution of the data allow us to detect the signatures of ongoing star formation in an extended rotating ring, at ~4 kpc from the nucleus. We find that the ring is almost perpendicular to the radio axis and its total star formation rate is ~1 MSol/yr. We briefly discuss the concomitant presence of recent star formation and nuclear activity. 
A.Bressan, R.Falomo, J.R. Valdes, R.Rampazzo