Halo profiles from weakly nonlinear initial conditions
Astrophysics
2007-05-23 v1
Abstract
Using weakly nonlinear conditional PDF for the density field around an overdense region we find that the expected density contrast around a peak is always smaller while its rms fluctuation larger than in the linear case. We apply these results to the spherical model of collapse as developed by Hoffman & Shaham (1985) and find that in the case of open Universe the effect of weakly nonlinear interactions is to decrease the scale from which a peak gathers mass and the mass itself as well as to steepen the final profile of the virialized protoobject.
Cite
@article{arxiv.astro-ph/9711128,
title = {Halo profiles from weakly nonlinear initial conditions},
author = {Ewa L. Lokas},
journal= {arXiv preprint arXiv:astro-ph/9711128},
year = {2007}
}
Comments
Contribution to the proceedings of the UC Santa Cruz Workshop on Galactic Halos, August 1997, 3 pages + 1 ps figure, uses paspconf.sty and epsf.sty