Constraints on the anisotropy of dark energy
Constraints on the anisotropy of dark energy
复制标题
暗能量各向异性的约束
DOI:
10.1103/physrevd.81.081301
复制
发表时间:
2010
影响因子:
5
通讯作者:
Appleby S
中科院分区:
文献类型:
--
作者:
Appleby S
If the equation of state of dark energy is anisotropic there will be additional quadrupole anisotropy in the cosmic microwave background induced by the time-dependent anisotropic stress quantified in terms of. Assuming that the entire amplitude of the observed quadrupole is due to this anisotropy, we conservatively impose a limit offor any value ofassuming that. This is considerably tighter than that which comes from supernovae. Stronger limits, up to a factor of 10, are possible for specific values ofand. Since we assume this component is uncorrelated with the stochastic component from inflation, we find that both the expectation value and the sample variance are increased. There is no improvement in the likelihood of an anomalously low quadrupole as suggested by previous work on an elliptical universe.
登录
查看更多内容
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
Kohsuke Sumiyoshi;Shigehiro Nagataki;山田章一;Shoichi Yamada;Shoichi Yamada;Shoichi Yamada;山田章一;Shoichi Yamada
通讯作者:
Shoichi Yamada
影响因子:
5
作者:
R. Battye;A. Moss
通讯作者:
A. Moss
影响因子:
5
作者:
A. Gruppuso
通讯作者:
A. Gruppuso
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
L. Campanelli;P. Cea;L. Tedesco
通讯作者:
L. Tedesco
影响因子:
4.9
作者:
Eisenstein, DJ;Zehavi, I;York, DG
通讯作者:
York, DG