Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...275..413s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 275, Dec. 15, 1983, p. 413-429.
Astronomy and Astrophysics
Astrophysics
58
Cosmology, Galactic Evolution, Neutrinos, Baryons, Boundary Value Problems, Perturbation
Scientific paper
Zel'dovich (1970, 1978) has expressed the view that the present structure in the universe formed when adiabatic, primordial density fluctuations grew by gravitational instability after the epoch of recombination. In the original picture, known as the 'pancake' scenario, the initial perturbation spectrum becomes truncated below some critical wavelength.The present investigation has the objective to test the hypothesis that galaxies can form within the context of the pancake scenario, if the universe is neutrino-dominated. The possibility is considered that neutrinos have a rest mass which allows them to dominate the matter density. The first detailed, hydrodynamical calculations of the combined growth of baryon-neutrino pancakes in a universe dominated by massive neutrinos are conducted. It is found that in the considered case the pancake scenario is just marginally able to form galaxies in a self-consistent way.
Melott Adrian L.
Shapiro Paul R.
Struck-Marcell Curtis
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