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

  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},
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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