A Possible Large-scale Alignment of Galaxy Spin Directions -- Analysis
  of 10 Datasets from SDSS, Pan-STARRS, and HST
  Multiple observations made by several different telescopes have shown
asymmetry between the number of spiral galaxies rotating in opposite directions
in different parts of the sky. One of the immediate questions regarding the
possible asymmetry of the spin directions is whether the distribution forms a
cosmological-scale axis. This paper analyzes and compares 10 different datasets
published in the past decade, collected by SDSS, Pan-STARRS, and Hubble Space
Telescope. The datasets contain spiral galaxies separated by their spin
direction, and the distribution can show dipole axes. The analysis shows that
the directions of the most probable dipole axes are consistent in datasets that
have similar average redshift, but different between datasets that have
different average redshift. The analysis also shows that the location of the
most probable axis correlates with the average redshift of the galaxies in the
datasets. That is, the location of the most probable axis shifts when the
redshift gets higher, and the correlation is statistically significant. This
provides a certain indication of a drift in a possible axis formed by the
distribution of galaxy spin directions, or a cosmological scale structure that
peaks at a certain distance from Earth.
