Domain walls, wakes, and structure formation

Details Domain walls, wakes, and structure formation Domain walls, wakes, and structure formation

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvd..47.3177m&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 47, Issue 8, 15 April 1993, pp.3177-3183

Mathematics

Logic

4

Particle-Theory And Field-Theory Models Of The Early Universe, Dark Matter

Scientific paper

We consider a cosmological domain wall model where the dark matter interacts nongravitationally with the walls. We find that the dark matter is quickly (as early as z~=100) swept up in wakes and voids, with the wakes growing with time in a self-similar manner. The dark matter wakes, of order 5h-1 Mpc thick today, tug on the baryons, which also trail behind in wakes of similar thickness. We find that the peculiar motions induced are of the order of a few hundred km/s, coherent on a scale of order 20h-1 Mpc. The baryon overdensities generated by the domain walls are distributed in a geometry similar to that of galaxy superclusters found in recent surveys.

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