Dark Energy with a Fine-toothed Comb

Details Dark Energy with a Fine-toothed Comb Dark Energy with a Fine-toothed Comb

2006-12-04

arxiv.org/abs/astro-ph/0612102v2

Phys.Rev.D75:063502,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures; minor changes to match PRD version

Scientific paper

10.1103/PhysRevD.75.063502

The cosmological constant and many other possible origins for acceleration of the cosmic expansion possess variations in the dark energy properties slow on the Hubble time scale. Given that models with more rapid variation, or even phase transitions, are possible though, we examine the fineness in redshift with which cosmological probes can realistically be employed, and what constraints this could impose on dark energy behavior. In particular, we discuss various aspects of baryon acoustic oscillations, and their use to measure the Hubble parameter H(z). We find that currently considered cosmological probes have an innate resolution no finer than Delta z=0.2-0.3.

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