Primordial Deuterium Abundance Measurements

Details Primordial Deuterium Abundance Measurements Primordial Deuterium Abundance Measurements

1997-12-23

arxiv.org/abs/astro-ph/9712305v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 Postscript figure, res.sty and ceu.sty files, to appear in "Particle Cosmology", eds. K. Sato, T. Yanagida and T. S

Scientific paper

Deuterium abundances measured recently from QSO absorption-line systems lie in the range from 3 10^{-5} to 3 10^{-4}, which shed some questions on standard big bang theory. We show that this discordance may simply be an artifact caused by inadequate analysis ignoring spatial correlations in the velocity field in turbulent media. The generalized procedure (accounting for such correlations) is suggested to reconcile the D/H measurements. An example is presented based on two high-resolution observations of Q1009+2956 (low D/H) [1,2] and Q1718+4807 (high D/H) [8,9]. We show that both observations are compatible with D/H = 4.1 - 4.6 10^{-5}, and thus support SBBN. The estimated mean value = 4.4 10^{-5} corresponds to the baryon-to-photon ratio during SBBN eta = 4.4 10^{-10} which yields the present-day baryon density Omega_b h^2 = 0.015.

Affiliated with

Also associated with

No associations

Rating

Primordial Deuterium Abundance Measurements 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 Primordial Deuterium Abundance Measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Primordial Deuterium Abundance Measurements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-541295