Dark Energy, Expansion History of the Universe, and SNAP

Details Dark Energy, Expansion History of the Universe, and SNAP Dark Energy, Expansion History of the Universe, and SNAP

2003-02-03

arxiv.org/abs/astro-ph/0302038v1

AIP Conf.Proc. 655 (2003) 193-207

Astronomy and Astrophysics

Astrophysics

9 pages; Talk at 3rd Tropical Workshop on Particle Physics and Cosmology, August 2002

Scientific paper

10.1063/1.1543500

This talk presents a pedagogical discussion of how precision distance-redshift observations can map out the recent expansion history of the universe, including the present acceleration and the transition to matter dominated deceleration. The proposed Supernova/Acceleration Probe (SNAP) will carry out observations determining the components and equations of state of the energy density, providing insights into the cosmological model, the nature of the accelerating dark energy, and potentially clues to fundamental high energy physics theories and gravitation. This includes the ability to distinguish between various dynamical scalar field models for the dark energy, as well as higher dimension and alternate gravity theories. A new, advantageous parametrization for the study of dark energy to high redshift is also presented.

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