Probing the nature of cosmic acceleration

2008/06/28 by Hongsheng Zhang, Heng Yu, Hyerim Noh +2 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1016/j.physletb.2008.06.041

published as Phys. Lett. B 665 (2008), pp. 319-324 · 10 pages, 6 figures, typo corrected

openalex publication_date 2008/06/28 · arxiv created 2008/07/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The cosmic acceleration is one of the most significant cosmological discoveries over the last century. The two categories of explanation are exotic component (dark energy) and modified gravity . We constrain the two types of model by a joint analysis with perturbation growth and direct H ( z ) data. Though the minimal χ 2 of the ΛCDM is almost the same as that of DGP, in the sense of consistency we find that the dark energy (ΛCDM) model is more favored through a detailed comparison with the corresponding parameters fitted by expansion data.

Citations

• Constraining the growth factor with baryon oscillations
• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• On the growth of linear perturbations
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• The Linear Theory Power Spectrum from the Lyα Forest in the Sloan Digital Sky Survey
• Dynamics of dark energy
• FIVE-YEARWILKINSON MICROWAVE ANISOTROPY PROBEOBSERVATIONS: COSMOLOGICAL INTERPRETATION
• Gravity on a brane in infinite-volume extra space

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