Limits on the changes in the gravitational constant from nucleosynthesis

Details Limits on the changes in the gravitational constant from nucleosynthesis Limits on the changes in the gravitational constant from nucleosynthesis

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap%26ss.310..173a&link_type=abstract

Astrophysics and Space Science, Volume 310, Issue 1-2, pp. 173-175

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

Due to the recent all-sky, high-precision measurement of microwave background anisotropies by WMAP, a value for baryon-to-photon ratio η was obtained. At the WMAP value for η, the 4HE abundance was predicted. In this article we use a simple semi-analytical method with 4He predicted and measured values to place a limit on the variation of the gravitational constant G. We find using a conservative range for the measured values for Y p , that ΔG/G is constrained between -0.26 and 0.15. If we assume a monotonic power law time dependence G˜t -β then β values is constrained between -0.008 and 0.0038, which translate into -2.8× 10^{-13} yr^{-1}

Affiliated with

Also associated with

No associations

Rating

Limits on the changes in the gravitational constant from nucleosynthesis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Limits on the changes in the gravitational constant from nucleosynthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limits on the changes in the gravitational constant from nucleosynthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1030818