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Illuminating gravitational waves: A concordant picture of photons from a neutron star merger

  • M. M. Kasliwal
  • , E. Nakar
  • , L. P. Singer
  • , D. L. Kaplan
  • , D. O. Cook
  • , A. Van Sistine
  • , R. M. Lau
  • , C. Fremling
  • , O. Gottlieb
  • , J. E. Jencson
  • , S. M. Adams
  • , U. Feindt
  • , K. Hotokezaka
  • , S. Ghosh
  • , D. A. Perley
  • , P. C. Yu
  • , T. Piran
  • , J. R. Allison
  • , G. C. Anupama
  • , A. Balasubramanian
  • K. W. Bannister, J. Bally, J. Barnes, S. Barway, E. Bellm, V. Bhalerao, D. Bhattacharya, N. Blagorodnova, J. S. Bloom, P. R. Brady, C. Cannella, D. Chatterjee, S. B. Cenko, B. E. Cobb, C. Copperwheat, A. Corsi, K. De, D. Dobie, S. W.K. Emery, P. A. Evans, O. D. Fox, D. A. Frail, C. Frohmaier, A. Goobar, G. Hallinan, F. Harrison, G. Helou, T. Hinderer, A. Y.Q. Ho, A. Horesh, W. H. Ip, R. Itoh, D. Kasen, H. Kim, N. P.M. Kuin, T. Kupfer, C. Lynch, K. Madsen, P. A. Mazzali, A. A. Miller, K. Mooley, T. Murphy, C. C. Ngeow, D. Nichols, S. Nissanke, P. Nugent, E. O. Ofek, H. Qi, R. M. Quimby, S. Rosswog, F. Rusu, E. M. Sadler, P. Schmidt, J. Sollerman, I. Steele, A. R. Williamson, Y. Xu, L. Yan, Y. Yatsu, C. Zhang, W. Zhao

Research output: Contribution to journalArticlepeer-review

Abstract

Merging neutron stars offer an excellent laboratory for simultaneously studying strong-field gravity and matter in extreme environments. We establish the physical association of an electromagnetic counterpart (EM170817) with gravitational waves (GW170817) detected from merging neutron stars. By synthesizing a panchromatic data set, we demonstrate that merging neutron stars are a long-sought production site forging heavy elements by r-process nucleosynthesis. The weak gamma rays seen in EM170817 are dissimilar to classical short gamma-ray bursts with ultrarelativistic jets. Instead, we suggest that breakout of a wide-angle, mildly relativistic cocoon engulfing the jet explains the low-luminosity gamma rays, the high-luminosity ultraviolet-optical-infrared, and the delayed radio and x-ray emission. We posit that all neutron star mergers may lead to a wide-angle cocoon breakout, sometimes accompanied by a successful jet and sometimes by a choked jet.

Original languageEnglish
Pages (from-to)1559-1565
Number of pages7
JournalScience
Volume358
Issue number6370
DOIs
StatePublished - 22 Dec 2017

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