First Structure Formation: II. Cosmic String + Hot Dark Matter Models
Astrophysics
2009-10-30 v1
Abstract
We examine the structure of baryonic wakes in the cosmological fluid which would form behind GUT-scale cosmic strings at early times (redshifts z > 100) in a neutrino-dominated universe. We show, using simple analytical arguments as well as 1- and 2-dimensional hydrodynamical simulations, that these wakes will NOT be able to form interesting cosmological objects before the neutrino component collapses. The width of the baryonic wakes (< 10 kpc comoving) is smaller than the scale of wiggles on the strings and are probably not enhanced by the wiggliness of the string network.
Keywords
Cite
@article{arxiv.astro-ph/9706262,
title = {First Structure Formation: II. Cosmic String + Hot Dark Matter Models},
author = {Tom Abel and Albert Stebbins and Peter Anninos and Michael L. Norman},
journal= {arXiv preprint arXiv:astro-ph/9706262},
year = {2009}
}
Comments
6 pages, 2 figures, submitted to ApJ. See also http://lca.ncsa.uiuc.edu/~tom/Strings/ which gives additional information, visualizations, and movies