The impact of r-process heating on the dynamics of neutron star merger accretion disc winds and their electromagnetic radiation

  title={The impact of r-process heating on the dynamics of neutron star merger accretion disc winds and their electromagnetic radiation},
  author={Hannah Klion and Alexander Tchekhovskoy and Daniel Kasen and Adithan Kathirgamaraju and Eliot Quataert and Rodrigo Fern{\'a}ndez},
  journal={Monthly Notices of the Royal Astronomical Society},
Neutron star merger accretion discs can launch neutron-rich winds of >10−2M⊙. This ejecta is a prime site for r-process nucleosynthesis, which will produce a range of radioactive heavy nuclei. The decay of these nuclei releases enough energy to accelerate portions of the wind by ∼0.1c. Here, we investigate the effect of r-process heating on the dynamical evolution of disc winds. We extract the wind from a 3D general relativistic magnetohydrodynamic simulation of a disc from a post-merger… 

General relativistic simulations of collapsing binary neutron star mergers with Monte-Carlo neutrino transport

Recent gravitational wave observations of neutron star-neutron star and neutron star-black hole binaries appear to indicate that massive neutron stars may not be too uncommon in merging systems.

Fast flavor instability in hypermassive neutron star disk outflows

We examine the effect of neutrino flavor transformation by the fast flavor instability (FFI) on long-term mass ejection from accretion disks formed after neutron star mergers. Neutrino emission and

Studying Postmerger Outflows from Magnetized-neutrino-cooled Accretion Disks

Neutrino-cooled accretion flow around a spinning black hole, produced by a compact binary merger, is a promising scenario for jet formation and launching magnetically driven outflows. Based on

Spectroscopic r-Process Abundance Retrieval for Kilonovae. I. The Inferred Abundance Pattern of Early Emission from GW170817

Freshly synthesized r-process elements in kilonovae ejecta imprint absorption features on optical spectra, as observed in the GW170817 binary neutron star merger. These spectral features encode

Estimating outflow masses and velocities in merger simulations: Impact of r -process heating and neutrino cooling

The determination of the mass, composition, and geometry of matter outflows in black hole – neutron star and neutron star – neutron star binaries is crucial to current efforts to model kilonovae and



HARMPI: 3D massively parallel general relativictic MHD code

Living Reviews in Relativity

  • 2017