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Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
We present a comprehensive study of r-process element nucleosynthesis in the ejecta of compact binary mergers (CBMs) and their relic black-hole (BH)-torus systems. The evolution of the BH-accretion…
Systematics of dynamical mass ejection, nucleosynthesis, and radioactively powered electromagnetic signals from neutron-star mergers
- A. Bauswein, S. Goriely, H. J. M. Astrophysics, Garching, Universit'e libre de Bruxelles
- 26 February 2013
We investigate systematically the dynamical mass ejection, r-process nucleosynthesis, and properties of electromagnetic counterparts of neutron-star (NS) mergers in dependence on the uncertain…
R-process nucleosynthesis in dynamically ejected matter of neutron star mergers
- S. Goriely, A. Bauswein, H.-Thomas Janka Universite Libre de Bruxelles, M. Astrophysics, Garching
- 5 July 2011
Although the rapid neutron-capture process, or r-process, is fundamentally important for explaining the origin of approximately half of the stable nuclei with A > 60, the astrophysical site of this…
Prompt merger collapse and the maximum mass of neutron stars.
This work performs hydrodynamical simulations of neutron-star mergers for a large sample of temperature-dependent nuclear equations of state and finds that the threshold mass is larger than the maximum mass of a nonrotating star in isolation by between 30 and 70 percent.
Neutron-star radius constraints from GW170817 and future detections
We introduce a new, powerful method to constrain properties of neutron stars (NSs). We show that the total mass of GW170817 provides a reliable constraint on the stellar radius if the merger did not…
Neutron-powered precursors of kilonovae
The merger of binary neutron stars (NSs) ejects a small quantity of neutron-rich matter, the radioactive decay of which powers a day to week long thermal transient known as a kilonova. Most of the…
Impact of weak interactions of free nucleons on the r-process in dynamical ejecta from neutron-star mergers
We investigate β-interactions of free nucleons and their impact on the electron fraction (Ye) and r-process nucleosynthesis in ejecta characteristic of binary neutron star mergers (BNSMs). For that…
Identification of strontium in the merger of two neutron stars
Reanalysis of the spectra associated with the merger of two neutron stars identifies strontium, spectroscopically establishing the origin of the heavy elements created by rapid neutron capture and proving that neutron stars comprise neutron-rich matter.
Measuring neutron-star properties via gravitational waves from neutron-star mergers.
We demonstrate by a large set of merger simulations for symmetric binary neutron stars (NSs) that there is a tight correlation between the frequency peak of the postmerger gravitational-wave (GW)…
On the nuclear robustness of the r process in neutron-star mergers
- J. Mendoza-Temis, Meng-Ru Wu, K. Langanke, G. Mart'inez-Pinedo, A. Bauswein, H. Janka
- 22 September 2014
We have performed r-process calculations for matter ejected dynamically in neutron star mergers based on a complete set of trajectories from a three-dimensional relativistic smoothed particle…