Dark Energy: A Burning Issue in Particle Physics and in Cosmology

Details Dark Energy: A Burning Issue in Particle Physics and in Cosmology Dark Energy: A Burning Issue in Particle Physics and in Cosmology

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20112601t&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #126.01; Bulletin of the American Astronomical Society, Vol. 34, p.1309

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Two independent lines of evidence point to accelerated expansion. Within Einstein's theory, the underlying cause is a component of energy with large negative pressure (p< -ρ /2), referred to as dark energy. Dark energy could be the energy associated with the quantum vacuum, the influence of extra dimensions, a slowly rolling scalar field or even an indication of a breakdown of Einstein's general relativity. Dark energy accounts for 2/3 of the mass--energy in the Universe, determines its destiny and perplexes even string theorists! It is a profound problem, a fantastic opportunity for deepening our understanding of the Universe and the laws that govern it, and cosmological measurements seem to be the only way to get at it.

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