1997/12/23 by Sergei A. Levshakov, S. A. Levshakov, Wilhelm H. Kegel +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9712305
4 pages, 1 Postscript figure, res.sty and ceu.sty files, to appear in "Particle Cosmology", eds. K. Sato, T. Yanagida and T. Shiromizu (Universal Academy Press, Inc. : Tokyo)
arxiv created 1997/12/23 · openalex publication_date 1997/12/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 Omegab h2 = 0.015.