2009/05/19 by Silvia Galli, S. Galli, A. Melchiorri +4 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.80.023508
published as Phys.Rev.D80:023508,2009 · 6 pages, 8 figures, corrected typos, added references
arxiv created 2009/05/19 · openalex publication_date 2009/07/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 \ensuremath∼10% level, that can be improved to \ensuremath∼3% by including big bang nucleosynthesis data. We show that future data expected from the Planck satellite could constrain G at the \ensuremath∼1.5% level while an ultimate, cosmic variance limited, CMB experiment could reach a precision of about 0.4%, competitive with current laboratory measurements.