Mapping the cosmological expansion

By Eric Linder. 2008

143 citations recorded by the source corpus.

The ability to map the cosmological expansion has developed enormously, spurred by the turning point one decade ago of the discovery of cosmic acceleration. The standard model of cosmology has shifted from a matter dominated, standard gravity, decelerating expansion to the present search for the origin of acceleration in the cosmic expansion. We present a wide ranging review of the tools, challenges and physical interpretations. The tools include direct measures of cosmic scales through Type Ia supernova luminosity distances, and angular distance scales of baryon acoustic oscillation and cosmic microwave background density perturbations, as well as indirect probes such as the effect of cosmic expansion on the growth of matter density fluctuations. Accurate mapping of the expansion requires understanding of systematic uncertainties in both the measurements and the theoretical framework, but the result will give important clues to the nature of the physics behind accelerating expansion and to the fate of the universe.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2eedf16103b98405330f81f6165c4978e285f60f

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In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Cosmological tests of modified gravity (2015, background): “There are a number of cosmological observations that measure different geometrical quantities (see [11, 14, 15] for reviews).”