A POSSIBLE FAST GROWTH OF ADIABATIC COSMOLOGICAL PERTURBATIONS

The key result of the standard galaxy formation theory is the expectation of a growth of the linear adiabatic perturbations proportional to (1 + Z)-1 (Z is the redshift). It is shown that this expectation need not be correct on small scales; alternatively, a (1 + Z)-2.2 growth is found. From this fact it follows that a categorical rejection of the simplest theory of the galaxy formation - i.e. the theory based on adiabatic perturbations in a baryon dominated universe - is premature.