Inhomogeneity-Induced Cosmic Acceleration in a Dust Universe
Date Issued
2006
Date
2006
Author(s)
Chuang, Chia-Hsun
DOI
en-US
Abstract
It is the common consensus that the expansion of a universe always
slows down if the gravity provided by the energy sources therein
is universally attractive. To examine this point we find
counter-examples for the spherically symmetric dust fluid
described by the Lemaitre-Tolman-Bondi solution. Thus, the
validity of this naive consensus is indeed doubtful and the
effects of inhomogeneities should be restudied. The example opens
a new perspective for understanding the evolution of our universe.
Subjects
不均勻
黑暗能量
加速膨脹
inhomogeneity
inhomogeneities
dark energy
cosmic acceleration
Type
thesis
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