The formation of the large-scale structures of the universe and primordial magnetic field by supernovae explosions

Details The formation of the large-scale structures of the universe and primordial magnetic field by supernovae explosions The formation of the large-scale structures of the universe and primordial magnetic field by supernovae explosions

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spub.repts....m&link_type=abstract

Conference Paper, Sao Paulo Univ. Brazil Inst. Astronomico e Geofisico.

Astronomy and Astrophysics

Astronomy

Galactic Clusters, Supernovae, Red Shift, Shock Waves, Interstellar Magnetic Fields, Universe, Astronomical Models, Radiant Cooling, Explosions, Temperature Gradients, Thermal Energy, Voids, Background Radiation, Magnetohydrodynamic Turbulence

Scientific paper

The theory of galactic formation and of large-scale structure generally assumes that all existing structures of the universe were formed from perturbations present initially in a homogeneous and isotropic universe. We study here the formation of the large-scale structures beginning from the collapse of a Population III object which created a shock wave at high redshift. The influence of various physical processes in the evolution of the shock wave such as Compton cooling by the radiation background, is analyzed in detail. Our results demonstrate that it is possible to obtain large voids of matter of dimensions approximately 55-69 Mpc, and masses of the shells on the order of superclusters of galaxies. We suggest the creation of a primordial magnetic field by a Biermann type mechanism in the shocks of primordial supernovae. We estimate the magnetic field created in the shock as B approximately 10-9G. This field is subsequently amplified by an alpha2 - dynamo mechanism in the turbulent region behind the shock.

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