Implications of the radio and X-ray emission that followed GW170817

@article{Nakar2018ImplicationsOT,
title={Implications of the radio and X-ray emission that followed GW170817},
author={Ehud Nakar and Tsvi Piran},
journal={Monthly Notices of the Royal Astronomical Society},
year={2018},
volume={478},
pages={407-415}
}
• Published 29 January 2018
• Physics
• Monthly Notices of the Royal Astronomical Society
The radio and X-rays that followed GW170817 increased gradually over $\sim~100$ days, resembling the radio flare predicted to arise from the interaction of a binary neutron star merger outflow with the ISM \citep{nakar2011}. Considering a blast wave moving with a Lorentz factor $\Gamma$, we show that an off-axis observer, namely an observer at $\theta_{obs}>1/\Gamma$, sees a light curve rising faster than $F_\nu\propto t^3$. Therefore, the observed rise, $F_\nu\propto~t^{0.78}$, implies that at…

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References

SHOWING 1-10 OF 76 REFERENCES

A cocoon shock breakout as the origin of the γ-ray emission in GW170817

• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
The short Gamma-Ray Burst, GRB170817A, that followed the binary neutron star merger gravitational waves signal, GW170817, is not a usual sGRB. It is weaker by three orders of magnitude than the

Electromagnetic counterparts to structured jets from gravitational wave detected mergers

• Physics
• 2017
We show the peak magnitude for orphan afterglows from the jets of gravitational wave (GW) detected black-hole/neutron star - neutron star (BH/NS-NS) mergers highly depends on the jet half-opening

From γ to Radio: The Electromagnetic Counterpart of GW170817

• Physics
The Astrophysical Journal
• 2018
The gravitational waves from the first binary neutron star merger, GW170817, were accompanied by a multiwavelength electromagnetic counterpart, from γ-rays to radio. The accompanying γ-rays seem at

The X-ray counterpart to the gravitational-wave event GW170817

• Physics
Nature
• 2017
The detection of X-ray emission at a location coincident with the kilonova transient provides the missing observational link between short γ-ray bursts and gravitational waves from neutron-star mergers, and gives independent confirmation of the collimated nature of the γ,ray-burst emission.

Ultrarelativistic electromagnetic counterpart to binary neutron star mergers

• Physics
• 2014
We propose a possibility of ultrarelativistic electromagnetic counterparts to gravitational waves from binary neutron star mergers at nearly all the viewing angles. Our proposed mechanism relies on

The optical afterglow of the short gamma-ray burst associated with GW170817

• Physics
Nature Astronomy
• 2018
The binary neutron star merger GW170817 was the first multi-messenger event observed in both gravitational and electromagnetic waves1,2. The electromagnetic signal began approximately two seconds

Short gamma-ray bursts at the dawn of the gravitational wave era

• Physics
• 2016
We derive the luminosity function and redshift distribution of short Gamma Ray Bursts (SGRBs) using (i) all the available observer-frame constraints (i.e. peak flux, fluence, peak energy and duration

Observational evidence for mass ejection accompanying short gamma ray bursts

• Physics
• 2017
The plateau in the duration distribution of long Gamma-Ray Bursts (LGRBs) provides a direct observational evidence for the Collapsar model. The plateau reflects the fact that the observed duration

The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. V. Rising X-Ray Emission from an Off-axis Jet

• Physics
• 2017
We report the discovery of rising X-ray emission from the binary neutron star merger event GW170817. This is the first detection of X-ray emission from a gravitational-wave (GW) source. Observations

The evolution of the X-ray afterglow emission of GW 170817 / GRB 170817A in XMM-Newton observations

• Physics
• 2018
We report our observation of the short gamma-ray burst (GRB) GRB 170817A, associated to the binary neutron star merger gravitational wave (GW) event GW 170817, performed in the X-ray band with