Confronting general relativity with further cosmological data

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.103523· OSTI ID:21503608

Daniel, Scott F ^[1]; Linder, Eric V ^[1]

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1. Institute for the Early Universe, Ewha Womans University, Seoul (Korea, Republic of)

Deviations from general relativity in order to explain cosmic acceleration generically have both time and scale-dependent signatures in cosmological data. We extend our previous work by investigating model-independent gravitational deviations in bins of redshift and length scale, by incorporating further cosmological probes such as temperature-galaxy and galaxy-galaxy cross-correlations, and by examining correlations between deviations. Markov Chain Monte Carlo likelihood analysis of the model-independent parameters fitting current data indicates that at low redshift general relativity deviates from the best fit at the 99% confidence level. We trace this to two different properties of the CFHTLS weak lensing data set and demonstrate that COSMOS weak lensing data does not show such deviation. Upcoming galaxy survey data will greatly improve the ability to test time and scale-dependent extensions to gravity and we calculate the constraints that the BigBOSS galaxy redshift survey could enable.

• OSTI ID: 21503608
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 10; Other Information: DOI: 10.1103/PhysRevD.82.103523; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
CORRELATIONS
COSMOLOGICAL MODELS
GALAXIES
GENERAL RELATIVITY THEORY
GRAVITATION
MARKOV PROCESS
MONTE CARLO METHOD
RED SHIFT
SIMULATION
UNIVERSE
CALCULATION METHODS
FIELD THEORIES
MATHEMATICAL MODELS
RELATIVITY THEORY
STOCHASTIC PROCESSES