Pseudo-Evolution of Galaxies in LCDM Cosmology
  Our knowledge about galaxy evolution comes from transforming observed galaxy
properties at different redshifts to co-moving physical scales. This
transformation depends on using a cosmological model. Here the effects of
unintentional mixing of two different cosmological models on the size evolution
of galaxies is studied. As a gedanken experiment, a galaxy of fixed proper size
and luminosity is moved across different redshifts. The apparent size of this
galaxy is then interpreted with a cosmological model presumed by the observer,
which is different compared to the cosmology exhibited by the Universe. In such
a case, a spurious size evolution of the galaxy is observed. A galaxy behaving
according to the R_h=ct and Neumann's cosmology, when interpreted with the LCDM
cosmological model, shows an increase in size by a factor of 1.1 and 1.3 from
z=7.5 to z approx. 0, respectively. The apparent size of a galaxy in a static
Euclidean cosmology, when interpreted in the LCDM model, shows a factor of 23.8
increase in size between z=7.5 to z approx. 0. This is in close agreement with
the observational data with a size increase of a factor of 6.8 between z=3.2 to
z approx. 0. Furthermore, using the apparent size data, it is shown that the
difference between the derived proper sizes in R_h=ct, Neumann's and LCDM
cosmological models are minimal.
