Magnetohydrodynamic solution to the problem of the origin of galaxies in an expanding universe

Details Magnetohydrodynamic solution to the problem of the origin of galaxies in an expanding universe Magnetohydrodynamic solution to the problem of the origin of galaxies in an expanding universe

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrvl..44..955f&link_type=abstract

Physical Review Letters, vol. 44, Apr. 7, 1980, p. 955-958.

Other

14

Cosmology, Galactic Evolution, Magnetohydrodynamic Stability, Plasma Conductivity, Universe, Astronomical Models, Gravitational Effects, Perturbation Theory

Scientific paper

In the universe prior to recombination the plasma conductivity lambda can range from 10 to the 12th to 10 to the 3rd mho/m. Plasma instabilities of a frozen-in magnetic field couple to the fluid motion to augment perturbations in density depending exponentially on the conductivity. Ultimately this leads to exponential growth of the density perturbations in an anisotropic, spatially homogeneous, magnetohydrodynamic background model at the rate t exp(lambda t) for isothermal and t exp(4 lambda t to the 1/4th) for adiabatic perturbations.

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