Gravitational backreaction of matter inhomogeneities
Gravitational backreaction of matter inhomogeneities
复制标题
物质不均匀性的引力逆反应
DOI:
10.1088/1475-7516/2006/12/001
复制
发表时间:
2006
影响因子:
6.4
通讯作者:
M. Redi
中科院分区:
文献类型:
--
作者:
A. Gruzinov;M. Kleban;M. Porrati;M. Redi
The non-linearity of Einstein’s equations makes it possible for small scale matter inhomogeneities to affect the universe at cosmological distances. We study the size of such effects using a simple heuristic model that captures the most important backreaction effect due to non-relativistic matter, as well as several exact solutions describing inhomogeneous and anisotropic expanding universes. We find that the effects are O(H2l2/c2) or smaller, where H is the Hubble parameter and l the typical size scale of inhomogeneities. For virialized structures this is of order v2/c2, where v is the characteristic peculiar velocity.