Optical Properties of Peaked Spectrum Radio Sources
  In this work, we study the optical properties of compact radio sources
selected from the literature in order to determine the impact of the radio-jet
in their circumnuclear environment. Our sample includes 58 Compact Steep
Spectrum (CSS) and GigaHertz Peaked Spectrum (GPS) and 14 Megahertz-Peaked
spectrum (MPS) radio sources located at $z\leq 1$. The radio luminosity ($L_R$)
of the sample varies between Log\,L$_R\sim$ 23.2 and 27.7 W\,Hz$^{-1}$. We
obtained optical spectra for all sources from SDSS-DR12 and performed a stellar
population synthesis using the {\sc starlight} code. We derived stellar masses
(M$_\star$), ages $\langle t_\star \rangle$, star formation rates (SFR),
metallicities $\langle Z_\star \rangle$ and internal reddening A$_V$ for all
young AGNs of our sample. A visual inspection of the SDSS images was made to
assign a morphological class for each source. Our results indicate that the
sample is dominated by intermediate to old stellar populations and there is no
strong correlation between optical and radio properties of these sources. Also,
we found that young AGNs can be hosted by elliptical, spiral and interacting
galaxies, confirming recent findings. When comparing the optical properties of
CSS/GPS and MPS sources, we do not find any significant difference. Finally,
the Mid-Infrared WISE colours analysis suggest that compact radio sources
defined as powerful AGNs are, in general, gas-rich systems.
