2006/05/31 by Kazuhiro Yamamoto, Bruce A. Bassett, R. C. Nichol +3 · 23 citations
Physics and Astronomy · #Acceleration #Astrophysics #Baryon #Baryon acoustic oscillations #Black Holes and Theoretical Physics #COSMIC cancer database #Classical mechanics #Cold dark matter #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Oscillation (cell signaling) #Physics #Planck #Redshift #Spectral density #Theoretical physics #astro-ph
paper · pdf · doi:10.1103/physrevd.74.063525
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 74(6), 063525-1-063525-11 (American Physical Society) · Physical Review D, in press
arxiv created 2006/09/24 · openalex publication_date 2006/09/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss how the baryon acoustic oscillation (BAO) signatures in the galaxy power spectrum can distinguish between modified gravity and the cosmological constant as the source of cosmic acceleration. To this end we consider a model characterized by a parameter n, which corresponds to the Dvali-Gabadadze-Porrati (DGP) model if n=2 and reduces to the standard spatially flat cosmological constant concordance model for n equal to infinity. We find that the different expansion histories of the modified gravity models systematically shifts the peak positions of BAO. A preliminary analysis using the current SDSS luminous red galaxy (LRG) sample indicates that the original DGP model is disfavored unless the matter density parameter exceeds 0.3. The constraints will be strongly tightened with future spectroscopic samples of galaxies at high redshifts. We demonstrate that WFMOS, in collaboration with other surveys such as Planck, will powerfully constrain modified gravity alternatives to dark energy as the explanation of cosmic acceleration.