Weighing the spatial and temporal fluctuations of the dark universe

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dc.creatorZhang, Pengjie
dc.creatorBean, Rachel
dc.creatorLiguori, Michele
dc.creatorDodelson, Scott
dc.date2008-09-17
dc.date.accessioned2026-07-07T10:03:28Z
dc.date.available2026-07-07T10:03:28Z
dc.descriptionA generic prediction of the standard cosmology, based on general relativity (GR), dark matter and the cosmological constant (and more generally, smooth dark energy), is that, the two gravitational potentials describing the spatial and temporal scalar perturbations of the universe are equivalent. Modifications in GR or dark energy clustering in general violate this relation. Thus this ratio serves as a smoking gun of the dark universe. We propose a method to extract this ratio at various cosmological scales and redshifts from a set of measurements, in a model independent way. The ratio measured by future surveys has strong discriminating power for a variety of dark universe scenarios.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0809.2836
dc.identifierhttp://arxiv.org/abs/0809.2836
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169298
dc.subjectAstrophysics
dc.titleWeighing the spatial and temporal fluctuations of the dark universe
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