From Cavendish to PLANCK: Constraining Newton's Gravitational Constant with CMB Temperature and Polarization Anisotropy
arXiv:0905.1808 · doi:10.1103/PhysRevD.80.023508
Abstract
We present new constraints on cosmic variations of Newton's gravitational constant by making use of the latest CMB data from WMAP, BOOMERANG, CBI and ACBAR experiments and independent constraints coming from Big Bang Nucleosynthesis. We found that current CMB data provide constraints at the 10% level, that can be improved to 3% by including BBN data. We show that future data expected from the Planck satellite could constrain G at the 1.5% level while an ultimate, cosmic variance limited, CMB experiment could reach a precision of about 0.4%, competitive with current laboratory measurements.
6 pages, 8 figures, corrected typos, added references
References in corpus (8)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
- Primordial Nucleosynthesis: from precision cosmology to fundamental physics
- Large Scale Structure as a Probe of Gravitational Slip
- High resolution CMB power spectrum from the complete ACBAR data set
- Distinguishing Modified Gravity from Dark Energy
- Constraints on a New Post-General Relativity Cosmological Parameter
- Delayed Recombination and Cosmic Parameters