Nuclear medium effect on neutron capture reactions during neutron star mergers
arXiv:2001.09570 · doi:10.1088/1361-6471/ab9d06
Abstract
The discovery of gravitational waves has confirmed old theoretical predictions that binary systems formed with compact stars play a crucial role not only for cosmology and nuclear astrophysics. As a byproduct of these and subsequent observations, it is now clear that neutron-star mergers can be a competitive site for the production of half of the elements heavier than iron in the universe following a sequence of fast neutron capture reactions known as the r process. In this article we discuss an effect which has been so far neglected in calculations of r-process nucleosynthesis in neutron star mergers. We show that the corrections due to the neutron environment even at relatively small neutron densities, within the bounds of numerical hydrodynamical simulations of neutron star mergers and after the onset of the r process, are non-negligible and need to be taken into account to accurately describe the elemental abundance as determined by observations.
arXiv comment5 pages, 5 figures, version to be published in J. Phys. G
References in corpus (7)
- Systematics of dynamical mass ejection, nucleosynthesis, and radioactively powered electromagnetic signals from neutron-star mergers
- Neutron Star Mergers and Nucleosynthesis of Heavy Elements
- The intermediate r-process in core-collapse supernovae driven by the magneto-rotational instability
- Merging Neutron Stars I: Initial Results for Coalescence of Non-Corotating Systems
- Probing Extreme-Density Matter with Gravitational Wave Observations of Binary Neutron Star Merger Remnants
- Primordial Black Holes and -Process Nucleosynthesis
- Advanced LIGO Constraints on Neutron Star Mergers and R-Process Sites