Why is the Universe Accelerating?
天体物理学
2009-07-09 v2 广义相对论与量子宇宙学
高能物理 - 唯象学
高能物理 - 理论
摘要
The universe appears to be accelerating, but the reason why is a complete mystery. The simplest explanation, a small vacuum energy (cosmological constant), raises three difficult issues: why the vacuum energy is so small, why it is not quite zero, and why it is comparable to the matter density today. I discuss these mysteries, some of their possible resolutions, and some issues confronting future observations.
引用
@article{arxiv.astro-ph/0310342,
title = {Why is the Universe Accelerating?},
author = {Sean M. Carroll},
journal= {arXiv preprint arXiv:astro-ph/0310342},
year = {2009}
}
备注
22 pages; Contribution to Measuring and Modeling the Universe, Carnegie Observatories Astrophysics Series Vol. 2, ed. W. L. Freedman; references improved