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Title: Exploring the dark energy redshift desert with the Sandage-Loeb test

Abstract

We study the prospects for constraining dark energy at very high redshift with the Sandage-Loeb test--a measurement of the evolution of cosmic redshift obtained by taking quasar spectra at sufficiently separated epochs. This test is unique in its coverage of the 'redshift desert,' corresponding roughly to redshifts between 2 and 5, where other dark energy probes are unable to provide useful information about the cosmic expansion history. Extremely large telescopes planned for construction in the near future, with ultrahigh resolution spectrographs (such as the proposed CODEX), will indeed be able to measure cosmic redshift variations of quasar Lyman-{alpha} absorption lines over a period as short as ten years. We find that these measurements can constrain nonstandard and dynamical dark energy models with high significance and in a redshift range not accessible with future dark energy surveys. As the cosmic signal increases linearly with time, measurements made over several decades by a generation of patient cosmologists may provide definitive constraints on the expansion history in the era that follows the dark ages but precedes the time when standard candles and rulers come into existence.

Authors:
 [1];  [2];  [3]
  1. LUTH, CNRS UMR 8102, Observatoire de Paris-Meudon, 5 Place Jules Janssen, 92195 Meudon Cedex (France)
  2. Kavli Institute for Cosmological Physics and Astronomy and Astrophysics Department, University of Chicago, Chicago, Illinois 60637 (United States)
  3. Dipartimento di Fisica e Sezione INFN, Universita degli Studi di Roma 'La Sapienza', Ple Aldo Moro 5, 00185, Rome (Italy)
Publication Date:
OSTI Identifier:
21020118
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.75.062001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ACCELERATION; COSMOLOGY; ENERGY SPECTRA; EVOLUTION; INFLATIONARY UNIVERSE; NONLUMINOUS MATTER; QUASARS; RED SHIFT; TIME MEASUREMENT; VARIATIONS

Citation Formats

Corasaniti, Pier-Stefano, Huterer, Dragan, and Melchiorri, Alessandro. Exploring the dark energy redshift desert with the Sandage-Loeb test. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.062001.
Corasaniti, Pier-Stefano, Huterer, Dragan, & Melchiorri, Alessandro. Exploring the dark energy redshift desert with the Sandage-Loeb test. United States. doi:10.1103/PHYSREVD.75.062001.
Corasaniti, Pier-Stefano, Huterer, Dragan, and Melchiorri, Alessandro. Thu . "Exploring the dark energy redshift desert with the Sandage-Loeb test". United States. doi:10.1103/PHYSREVD.75.062001.
@article{osti_21020118,
title = {Exploring the dark energy redshift desert with the Sandage-Loeb test},
author = {Corasaniti, Pier-Stefano and Huterer, Dragan and Melchiorri, Alessandro},
abstractNote = {We study the prospects for constraining dark energy at very high redshift with the Sandage-Loeb test--a measurement of the evolution of cosmic redshift obtained by taking quasar spectra at sufficiently separated epochs. This test is unique in its coverage of the 'redshift desert,' corresponding roughly to redshifts between 2 and 5, where other dark energy probes are unable to provide useful information about the cosmic expansion history. Extremely large telescopes planned for construction in the near future, with ultrahigh resolution spectrographs (such as the proposed CODEX), will indeed be able to measure cosmic redshift variations of quasar Lyman-{alpha} absorption lines over a period as short as ten years. We find that these measurements can constrain nonstandard and dynamical dark energy models with high significance and in a redshift range not accessible with future dark energy surveys. As the cosmic signal increases linearly with time, measurements made over several decades by a generation of patient cosmologists may provide definitive constraints on the expansion history in the era that follows the dark ages but precedes the time when standard candles and rulers come into existence.},
doi = {10.1103/PHYSREVD.75.062001},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}