A modification of the baryonic dark matter model.

Details A modification of the baryonic dark matter model. A modification of the baryonic dark matter model.

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325....1m&link_type=abstract

Astronomy and Astrophysics, v.325, p.1-8

Astronomy and Astrophysics

Astrophysics

1

Cosmic Microwave Background, Dark Matter

Scientific paper

The conventional baryonic dark matter model of galaxy formation uses the concept of entropy fluctuations. The key idea of this picture is based on the assumption that already before the recombination on the scales characterized by masses not bigger than ~10^9^Msun_ the entropic fluctuations were non-linear, and they were formed by non-gravitational processes. In this paper the basis of a modification of the baryonic dark matter picture is presented. This modification uses - instead of the entropic fluctuations - the concept of adiabatic perturbations existing only during and after the recombination. It reproduces the key idea of conventional picture: roughly for solar masses bold anisotropies should occur immediately during the recombination. Nevertheless, contrary to the conventinonal picture, this occurs without any non-gravitational phenomenons. All this follows from the so called "Bessel-Macdonald" instability, which is predicted to exist by a careful mathematical analysis of the key equation of adiabatic perturbations.

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