Jet-triggered star formation in young radio galaxies
  Emission in the ultraviolet continuum is a salient signature of the hot,
massive and consequently short-lived, stellar population that traces recent or
ongoing star formation. With the aim of mapping star forming regions and
morphologically separating the generic star formation from that associated with
the galaxy-scale jet activity, we obtained high-resolution HST/UV imaging for a
sample of nine compact radio sources. Out of these, seven are known Compact
Steep Spectrum (CSS) galaxies that host young, kpc-scale radio sources and
hence are the best candidates for studying radio-mode feedback on galaxy
scales, while the other two form a control sample of larger sources. Extended
UV emission regions are observed in six of the seven CSS sources showing close
spatial alignment with the radio-jet orientation. If other mechanisms possibly
contributing to the observed UV emission are ruled out, this could be evidence
in support of jet-triggered star formation in the CSS phase of radio galaxy
evolution.
