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

A. C. O. Leite (U. Porto); A. Seganti (U. Roma "La Sapienza"); C. J. A. P. Martins (CAUP; L. Amendola (ITP; N. J. Nunes (ITP; P. O. J. Pedrosa (U. Porto); U. Heidelberg); U. Porto)

arxiv: 1109.6793 · v2 · pith:B43MCAKHnew · submitted 2011-09-30 · 🌌 astro-ph.CO

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

L. Amendola (ITP , U. Heidelberg) , A. C. O. Leite (U. Porto) , C. J. A. P. Martins (CAUP , U. Porto) , N. J. Nunes (ITP , P. O. J. Pedrosa (U. Porto) , A. Seganti (U. Roma "La Sapienza") This is my paper

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keywords darkenergycomponentdiscussfundamentalmeasurementsprincipalredshift

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

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