Quintessence and the Separation of CMB Peaks

Details Quintessence and the Separation of CMB Peaks Quintessence and the Separation of CMB Peaks

2000-12-06

arxiv.org/abs/astro-ph/0012139v2

Astrophys.J. 559 (2001) 501-506

Astronomy and Astrophysics

Astrophysics

Replaced with version to appear in Astrophysical Journal

Scientific paper

10.1086/322253

We propose that it should be possible to use the CMB to discriminate between dark energy models with different equations of state, including distinguishing a cosmological constant from many models of quintessence. The separation of peaks in the CMB anisotropies can be parametrised by three quantities: the amount of quintessence today, the amount at last scattering, and the averaged equation of state of quintessence. In particular, we show that the CMB peaks can be used to measure the amount of dark energy present before last scattering.

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