Theoretical uncertainty in baryon oscillations

被引:59
作者
Eisenstein, D [1 ]
White, M
机构
[1] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
来源
PHYSICAL REVIEW D | 2004年 / 70卷 / 10期
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevD.70.103523
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We discuss the systematic uncertainties in the recovery of dark energy properties from the use of baryon acoustic oscillations as a standard ruler. We demonstrate that while unknown relativistic components in the universe prior to recombination would alter the sound speed, the inferences for dark energy from low-redshift surveys are unchanged so long as the microwave background anisotropies can measure the redshift of matter-radiation equality, which they can do to sufficient accuracy. The mismeasurement of the radiation and matter densities themselves (as opposed to their ratio) would manifest as an incorrect prediction for the Hubble constant at low-redshift. In addition, these anomalies do produce subtle but detectable features in the microwave anisotropies.
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页数:4
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