Peculiar Motions of Galaxy Clusters in the Regions of Superclusters of
  galaxies
  We present results of the study of peculiar motions of 57 clusters and groups
of galaxies in the regions of the Corona Borealis (CrB), Bootes (Boo),
Z5029/A1424, A1190, A1750/A1809 superclusters of galaxies and 20 galaxy
clusters located beyond massive structures ($0.05<z<0.10$). Using the SDSS
(Data Release 8) data, a sample of early-type galaxies was compiled in the
systems under study, their fundamental planes were built, and relative
distances and peculiar velocities were determined. Within the galaxy
superclusters, significant peculiar motions along the line of sight are
observed with rms deviations of $652\pm50$~km s$^{-1}$---in CrB, $757\pm70$~km
s$^{-1}$---in Boo. For the most massive A2065 cluster in the CrB supercluster,
no peculiar velocity was found. Peculiar motions of other galaxy clusters can
be caused by their gravitational interaction both with A\,2065 and with the
A2142 supercluster. It has been found that there are two superclusters
projected onto each other in the region of the Bootes supercluster with a
radial velocity difference of about 4000~km s$^{-1}$. In the Z5029/A1424
supercluster near the rich Z5029 cluster, the most considerable peculiar
motions with a rms deviation of $1366\pm170$~km s$^{-1}$ are observed. The rms
deviation of peculiar velocities of 20 clusters that do not belong to
large-scale structures is equal to $0\pm20$~km s$^{-1}$. The whole sample of
the clusters under study has the mean peculiar velocity equal to $83\pm130$~km
s$^{-1}$ relative to the cosmic microwave background.
