We present a study of the kinematic and spectral ages of the Gigahertz-Peaked Spectrum ( GPS ) source CTD 93 .
Measurements of the hot spot separation over 8.5 yr show evidence of an increase .
The separation rate along the source axis is 0.34 \pm 0.11 c ( H _ { 0 } =72 km s ^ { -1 } Mpc ^ { -1 } ) , which results in a kinematic age of 2200 \pm 700 yr .
Assuming that two hot spots are moving apart at equal speeds , we derive an advance speed of 0.17 \pm 0.06 c .
The radio lobe spectra show a high frequency steepening , as expected if energetic electrons lose energy by synchrotron radiation .
The spectral break decreases with the distance from the hot spot in the northern component of CTD 93 .
This tendency is expected from the basic scenario of radio lobe evolution involving particle acceleration at the hot spots , with the radio lobes populated by high energy electrons which have leaked from the hot spots .
Although a core-jet morphology for CTD 93 has previously been proposed , these results indicate that the morphology is similar to that of Compact Symmetric Object ( CSO ) .
From the spectral fits in the northern component we found a break frequency of 3.7 GHz at the edge of the lobe .
The resultant spectral age is \sim 300 yr assuming the equipartition magnetic field .
This requires the advance speed of 0.26 c , which shows a good agreement of the hot spot motion of 0.17 \pm 0.06 c .
Our results strongly support the hypothesis that CSOs are young radio sources .