Table of Contents
Journal of Astrophysics
Volume 2013, Article ID 587294, 9 pages
Research Article

Constraint on Heavy Element Production in Inhomogeneous Big-Bang Nucleosynthesis from the Light Element Observations

1Department of Physics, Graduate School of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
2Department of Control and Information Systems Engineering, Kumamoto National College of Technology, 2659-2 Suya, Koshi, Kumamoto 861-1102, Japan
3Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8568, Japan
4National Institutes of Natural Sciences, Kamiyacho Central Place 2F, 4-3-13 Toranomon, Minato-ku, Tokyo 104-0001, Japan

Received 30 March 2013; Accepted 29 July 2013

Academic Editors: G. Chincarini, X. Dai, A. De Rosa, M. S. Dimitrijevic, and G. Wegner

Copyright © 2013 Riou Nakamura et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We investigate the observational constraints on the inhomogeneous big-bang nucleosynthesis that Matsuura et al. (2005) suggested that states the possibility of the heavy element production beyond 7Li in the early universe. From the observational constraints on light elements of 4He and D, possible regions are found on the plane of the volume fraction of the high-density region against the ratio between high- and low-density regions. In these allowed regions, we have confirmed that the heavy elements beyond Ni can be produced appreciably, where p- and/or r-process elements are produced well simultaneously.