Galaxy spin direction distribution in HST and SDSS show similar
  large-scale asymmetry
  Several recent observations using large datasets of galaxies showed
non-random distribution of the spin directions of spiral galaxies, even when
the galaxies are too far from each other to have gravitational interaction.
Here, a dataset of $\sim8.7\cdot10^3$ spiral galaxies imaged by Hubble Space
Telescope is used to test and profile a possible asymmetry between galaxy spin
directions. The asymmetry between galaxies with opposite spin directions is
compared to the asymmetry of galaxies from the Sloan Digital Sky Survey. The
two datasets contain different galaxies at different redshift ranges, and each
dataset was annotated using a different annotation method. The results show
that both datasets show a similar asymmetry in the COSMOS field, which is
covered by both telescopes. Fitting the asymmetry of the galaxies to cosine
dependence shows a dipole axis with probabilities of $\sim2.8\sigma$ and
$\sim7.38\sigma$ in HST and SDSS, respectively. The most likely dipole axis
identified in the HST galaxies is at $(\alpha=78^o,\delta=47^o)$, and is well
within the $1\sigma$ error range compared to the location of the most likely
dipole axis in the SDSS galaxies with $z>0.15$, identified at
$(\alpha=71^o,\delta=61^o)$.
