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Centro de Astrofísica da Universidade do Porto

Fundamental cosmology from precision spectroscopy. II. Synergies with supernovae

A. C. O. Leite, C. J. A. P. Martins

Abstract
In a previous work [Amendola et al., Phys. Rev. D 86, 063515 (2012)], principal component analysis based methods to constrain the dark energy equation of state using type Ia supernovae and other low redshift probes were extended to spectroscopic tests of the stability fundamental couplings, which can probe higher redshifts. Here we use them to quantify the gains in sensitivity obtained by combining spectroscopic measurements expected from ESPRESSO at the Very Large Telescope and the high-resolution ultrastable spectrograph for the E-ELT (European Extremely Large Telescope; known as ELT-HIRES) with future supernova surveys. In addition to simulated low and intermediate redshift supernova surveys, we assess the dark energy impact of high-redshift supernovae detected by the James Webb Space Telescope and characterized by the E-ELT or the Thirty Meter Telescope. Our results show that a detailed characterization of the dark energy properties beyond the acceleration phase (i.e., deep in the matter era) is viable and may reach as deep as redshift 4.

Keywords
Cosmology, Mathematical and relativistic aspects of cosmology

Physical Review D
Volume 91, Page 103519
May 2015

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