颗粒宇宙中的宇宙学膨胀扰动
天体物理学
2007-05-23 v1
摘要
宇宙的物质含量在足够大的尺度上通常被视为理想流体,适用于所有纪元。但近期的宇宙物质分布,由(理想化的)随机分布的引力坍缩结构组成,更准确地描述为离散颗粒的集合,而非流体。众所周知,颗粒材料可能具有与流体截然不同的宏观性质;类似地,我们研究了近期宇宙中普遍存在的小尺度不均匀性可能导致中尺度和/或大尺度上宇宙学膨胀扰动的可能性。
引用
@article{arxiv.astro-ph/0702703,
title = {Perturbations to the Cosmological Expansion in a Grainy Universe},
author = {Brett Bochner},
journal= {arXiv preprint arXiv:astro-ph/0702703},
year = {2007}
}
备注
Poster presented at the 21st Texas Symposum on Relativistic Astrophysics, Florence, Italy, December 9-13, 2002. 16 pages, no figures. Qualitative discussion of several fundamental questions and problems in cosmology; to be superceded in the future by a detailed, quantitative model