Nucleosynthesis Predictions and High-Precision Deuterium Measurements
Institute of Theoretical Astrophysics, The University of Oslo, Boks 1072 Blindern, NO-0316 Oslo, Norway
Author to whom correspondence should be addressed.
Academic Editors: Mariusz P. Dąbrowski, Manuel Krämer and Vincenzo Salzano
Received: 9 January 2017 / Revised: 25 April 2017 / Accepted: 3 May 2017 / Published: 9 May 2017
Two new high-precision measurements of the deuterium abundance from absorbers along the line of sight to the quasar PKS1937–1009 were presented. The absorbers have lower neutral hydrogen column densities (N(HI) ≈ 18 cm
) than for previous high-precision measurements, boding well for further extensions of the sample due to the plenitude of low column density absorbers. The total high-precision sample now consists of 12 measurements with a weighted average deuterium abundance of D/H =
. The sample does not favour a dipole similar to the one detected for the fine structure constant. The increased precision also calls for improved nucleosynthesis predictions. For that purpose we have updated the public AlterBBN code including new reactions, updated nuclear reaction rates, and the possibility of adding new physics such as dark matter. The standard Big Bang Nucleosynthesis prediction of D/H =
is consistent with the observed value within 1.7 standard deviations.
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. (CC BY 4.0).
Scifeed alert for new publications
Never miss any articles
matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
Define your Scifeed now
Share & Cite This Article
MDPI and ACS Style
Riemer-Sørensen, S.; Jenssen, E.S. Nucleosynthesis Predictions and High-Precision Deuterium Measurements. Universe 2017, 3, 44.
Riemer-Sørensen S, Jenssen ES. Nucleosynthesis Predictions and High-Precision Deuterium Measurements. Universe. 2017; 3(2):44.
Riemer-Sørensen, Signe; Jenssen, Espen S. 2017. "Nucleosynthesis Predictions and High-Precision Deuterium Measurements." Universe 3, no. 2: 44.
Show more citation formats
Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
[Return to top]
Multiple requests from the same IP address are counted as one view.