Turnaround physics beyond spherical symmetry
  The concept of turnaround surface in an accelerating universe is generalized
to arbitrarily large deviations from spherical symmetry, to close the gap
between the idealized theoretical literature and the real world observed by
astronomers. As an analytical application, the characterization of turnaround
surface is applied to small deviations from spherical symmetry, recovering a
previous result while extending it to scalar-tensor gravity.
