Constraints on the ejecta of the GW170817 neutron star merger from its electromagnetic emission

@article{Waxman2018ConstraintsOT,
  title={Constraints on the ejecta of the GW170817 neutron star merger from its electromagnetic emission},
  author={Eli Waxman and Eran O. Ofek and Doron Kushnir and Avishay Gal-yam},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2018}
}
We present a simple analytic model, that captures the key features of the emission of radiation from material ejected by the merger of neutron stars (NS), and construct the multi-band and bolometric luminosity light curves of the transient associated with GW 170817, AT 2017gfo, using all available data. The UV to IR emission is shown to be consistent with a single $\approx0.05$ M$_\odot$ component ejecta, with a power-law velocity distribution between $\approx 0.1 c$ and $>0.3 c$, a low opacity… Expand
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References

SHOWING 1-10 OF 85 REFERENCES
Mass ejection from the merger of binary neutron stars
Numerical-relativity simulations for the merger of binary neutron stars are performed for a variety of equations of state (EOSs) and for a plausible range of the neutron-star mass, focusing primarilyExpand
Opacities and Spectra of the $r$-process Ejecta from Neutron Star Mergers
Material ejected during (or immediately following) the merger of two neutron stars may assemble into heavy elements through the r-process. The subsequent radioactive decay of the nuclei can powerExpand
Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817
Recent detection of gravitational waves from a neutron star (NS) merger event GW170817 and identification of an electromagnetic counterpart provide a unique opportunity to study the physicalExpand
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral.
TLDR
The association of GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts. Expand
Neutrino-driven winds in the aftermath of a neutron star merger: nucleosynthesis and electromagnetic transients
We present a comprehensive nucleosynthesis study of the neutrino-driven wind in the aftermath of a binary neutron star merger. Our focus is the initial remnant phase when a massive central neutronExpand
The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
We report the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser InterferometerExpand
GRB170817A associated with GW170817: multifrequency observations and modeling of prompt gamma-ray emission
We present our observations of electromagnetic transients associated with GW170817/GRB 170817A using optical telescopes of Chilescope observatory and Big Scanning Antenna (BSA) of Pushchino RadioExpand
Electromagnetic evidence that SSS17a is the result of a binary neutron star merger
Photons from a gravitational wave event Two neutron stars merging together generate a gravitational wave signal and have also been predicted to emit electromagnetic radiation. When the gravitationalExpand
The cocoon emission - an electromagnetic counterpart to gravitational waves from neutron star mergers
Short Gamma-Ray Bursts (SGRBs) are believed to arise from compact binary mergers (either neutron star-neutron star or black hole-neutron star). If so their jets must penetrate outflows that areExpand
Electromagnetic counterparts of compact object mergers powered by the radioactive decay of r‐process nuclei
The most promising astrophysical sources of kHz gravitational waves (GWs) are the inspiral and merger of binary neutron star(NS)/black hole systems. Maximizing the scientific return of a GW detectionExpand
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