Dark Energy in the Dark Ages

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Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or"reasonable'" canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of<~;;2percent of total energy density at z>> 1 for many models. Intermediate dark energy can have effects distinct from its energy density; the dark ages acceleration can be constrained to last less than 5percent of a Hubble e-fold time, exacerbating the coincidence problem. Both the total linear growth, or equivalently sigma 8, and the shape and evolution of the nonlinear mass power spectrum ... continued below

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Linder, Eric V. April 11, 2006.

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Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or"reasonable'" canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of<~;;2percent of total energy density at z>> 1 for many models. Intermediate dark energy can have effects distinct from its energy density; the dark ages acceleration can be constrained to last less than 5percent of a Hubble e-fold time, exacerbating the coincidence problem. Both the total linear growth, or equivalently sigma 8, and the shape and evolution of the nonlinear mass power spectrum for z<2 (using the Linder-White nonlinear mapping prescription) provide important windows. Probes of growth, such as weak gravitational lensing, can interact with supernovae and CMB distance measurements to scan dark energy behavior over the entire range z=0-1100.

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  • Journal Name: Astroparticle Physics; Related Information: Journal Publication Date: August 2006

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  • Report No.: LBNL-61876
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1016/j.astropartphys.2006.04.004 | External Link
  • Office of Scientific & Technical Information Report Number: 962963
  • Archival Resource Key: ark:/67531/metadc934258

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  • April 11, 2006

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 18, 2016, 3:43 p.m.

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Linder, Eric V. Dark Energy in the Dark Ages, article, April 11, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc934258/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.