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We present a study of the kinematic and spectral ages of the Gigahertz-PeakedSpectrum (GPS) source CTD~93. Measurements of the hot spot separation over 8.5yr show evidence of an increase. The separation rate along the source axis is0.34$\pm0.11c$ (H$_{0}$=72 km s$^{-1}$ Mpc$^{-1}$), which results in akinematic age of 2200$\pm$700 yr. Assuming that two hot spots are moving apartat equal speeds, we derive an advance speed of 0.17$\pm0.06c$. The radio lobespectra show a high frequency steepening, as expected if energetic electronslose energy by synchrotron radiation. The spectral break decreases with thedistance from the hot spot in the northern component of CTD~93. This tendencyis expected from the basic scenario of radio lobe evolution involving particleacceleration at the hot spots, with the radio lobes populated by high energyelectrons which have leaked from the hot spots. Although a core-jet morphologyfor CTD~93 has previously been proposed, these results indicate that themorphology is similar to that of Compact Symmetric Object (CSO). From thespectral fits in the northern component we found a break frequency of 3.7 GHzat the edge of the lobe. The resultant spectral age is $\sim$300 yr assumingthe equipartition magnetic field. This requires the advance speed of 0.26$c$,which shows a good agreement of the hot spot motion of 0.17$\pm0.06c$. Ourresults strongly support the hypothesis that CSOs are young radio sources.Comment: 25 pages, 19 figures, accepted for publication in Ap

The Kinematic and Spectral Ages of the Compact Radio Source CTD 93