Dynamical Evolution of Voids with Surrounding Gravitational Tidal Field
Abstract
The void ellipticity distribution today can be well explained by the tidal field. Going a step further from the overall distribution, we investigate individuality on the tidal response of void shape in non-linear dynamical evolution. We perform an N-body simulation and trace individual voids using particle ID. The voids are defined based on Voronoi tessellation and watershed algorithm, using public code VIDE. A positive correlation is found between the time variation of void ellipticity and tidal field around a void if the void maintains its constituent particles. Such voids tend to have smaller mass densities. Conversely, not a few voids significantly deform by particle exchange, rather than the tidal field. Those voids may prevent us from correctly proving a quadrupole field of gravity out of a void shape.
Cite
@article{arxiv.2103.01522,
title = {Dynamical Evolution of Voids with Surrounding Gravitational Tidal Field},
author = {Mutsumi Minoguchi and Atsushi J. Nishizawa and Tsutomu T. Takeuchi and Naoshi Sugiyama},
journal= {arXiv preprint arXiv:2103.01522},
year = {2021}
}
Comments
10 pages, 12 figures