A possible fast growth of adiabatic cosmological perturbations

Details A possible fast growth of adiabatic cosmological perturbations A possible fast growth of adiabatic cosmological perturbations

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278....1m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 1, p. 1-5

Astronomy and Astrophysics

Astrophysics

2

Adiabatic Conditions, Cosmology, Galactic Evolution, Red Shift, Baryons, Dark Matter, Gravitational Fields, Perturbation

Scientific paper

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.

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