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arXiv · 1109.6793

Variation of fundamental parameters and dark energy. A principal component approach

L. Amendola·A. C. O. Leite·C. J. A. P. Martins·N. J. Nunes·P. O. J. Pedrosa·A. Seganti
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Abstract

We discuss methods based on Principal Component Analysis to constrain the dark energy equation of state using a combination of Type Ia supernovae at low redshift and spectroscopic measurements of varying fundamental couplings at higher redshifts. We discuss the performance of this method when future better-quality datasets are available, focusing on two forthcoming ESO spectrographs - ESPRESSO for the VLT and CODEX for the E-ELT - which include these measurements as a key part of their science cases. These can realize the prospect of a detailed characterization of dark energy properties almost all the way up to redshift 4.

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L. Amendola, A. C. O. Leite, C. J. A. P. Martins, N. J. Nunes, P. O. J. Pedrosa, A. Seganti. 2012-08-30. Variation of fundamental parameters and dark energy. A principal component approach. https://doi.org/10.1103/physrevd.86.063515

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