Large-scale asymmetry in galaxy spin directions -- analysis of galaxies
  with spectra in DES, SDSS, and DESI Legacy Survey
  Multiple previous studies using several different probes have shown
considerable evidence for the existence of cosmological-scale anisotropy and a
Hubble-scale axis. One of the probes that show such evidence is the
distribution of the directions toward which galaxies spin. The advantage of the
analysis of the distribution of galaxy spin directions compared to the CMB
anisotropy is that the ratio of galaxy spin directions is a relative
measurement, and therefore less sensitive to background contamination such as
Milky Way obstruction. Another advantage is that many spiral galaxies have
spectra, and therefore allow to analyze the location of such axis relative to
Earth. This paper shows an analysis of the distribution of the spin directions
of over 90K galaxies with spectra. That analysis is also compared to previous
analyses using the Earth-based SDSS, Pan-STARRS, and DESI Legacy Survey, as
well as space-based data collected by HST. The results show very good agreement
between the distribution patterns observed with the different telescopes. The
dipole or quadrupole axes formed by the spin directions of the galaxies with
spectra do not necessarily go directly through Earth.
