Abstract
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 M☉ yr-1. We briefly discuss the concomitant presence of recent star formation and nuclear activity.
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