Beyond boundaries of redshift surveys: assessing mass fluctuations on
  "super-survey" scales
  The observed density field in redshift space is directly affected by the
radial motions generated from mass fluctuations outside the volume occupied by
a given galaxy redshift survey. These motions introduce redshift space
anisotropies which are more pronounced at larger distances from the survey's
center, thus offering clues to the nature of mass fluctuations on super-survey
scales. Furthermore, we note that all estimates of the growth factor derived
from redshift space distortions are based on relations which explicitly assume
that the velocity field is generated by mass fluctuations inside the survey
volume. This may cause uncertainties in these estimates which are on the order
of a few percent.
