Multifrequency study of a double-double radio galaxy J0028+0035
  We report the discovery of a double-double radio source (DDRS) J0028+0035. We
observed it with LOFAR, GMRT, and the VLA. By combining our observational data
with those from the literature, we gathered an appreciable set of radio flux
density measurements covering the range from 74 MHz to 14 GHz. This enabled us
to carry out an extensive review of physical properties of the source and its
dynamical evolution analysis. In particular, we found that, while the age of
the large-scale outer lobes is about 245 Myr, the renewal of the jet activity,
which is directly responsible for the double-double structure, took place only
about 3.6 Myr ago after about 11 Myr long period of quiescence. Another
important property typical for DDRSs and also present here is that the
injection spectral indices for the inner and the outer pair of lobes are
similar. The jet powers in J0028+0035 are similar too. Both these circumstances
support our inference that it is, in fact, a DDRS which was not recognized as
such so far because of the presence of a coincident compact object close to the
inner double so that the centre of J0028+0035 is apparently a triple.
