NGC 4993, the shell galaxy host of GW170817: constraints on the recent galactic merger

@article{Ebrova2020NGC4T,
  title={NGC 4993, the shell galaxy host of GW170817: constraints on the recent galactic merger},
  author={Ivana Ebrov'a and Michal B'ilek and Mustafa K. Yıldız and Jivr'i Eli'avsek},
  journal={Astronomy \& Astrophysics},
  year={2020}
}
Context. NGC 4993 is the shell galaxy host of the GRB170817A short gamma-ray burst and the GW170817 gravitational-wave event produced during a binary-neutron-star coalescence. Aims. The galaxy shows signs, including the stellar shells, that it has recently accreted a smaller, late-type galaxy. The accreted galaxy might be the original host of the binary neutron star. Methods. We measured the positions of the stellar shells of NGC 4993 in an HST/ACS archival image and use the shell positions to… 

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