@article{886963bdb08241c0bbd535c2cd7e0b91,

title = "Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817",

abstract = "The source of the gravitational-wave (GW) signal GW170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observations of this type. The two-week-long electromagnetic (EM) counterpart had a signature indicative of an r-process-induced optical transient known as a kilonova. This Letter examines how the mass of the dynamical ejecta can be estimated without a direct electromagnetic observation of the kilonova, using GW measurements and a phenomenological model calibrated to numerical simulations of mergers with dynamical ejecta. Specifically, we apply the model to the binary masses inferred from the GW measurements, and use the resulting mass of the dynamical ejecta to estimate its contribution (without the effects of wind ejecta) to the corresponding kilonova light curves from various models. The distributions of dynamical ejecta mass range between Mej = 10-3 - 10-2 M⊙ for various equations of state, assuming that the neutron stars are rotating slowly. In addition, we use our estimates of the dynamical ejecta mass and the neutron star merger rates inferred from GW170817 to constrain the contribution of events like this to the r-process element abundance in the Galaxy when ejecta mass from post-merger winds is neglected. We find that if ≳10% of the matter dynamically ejected from binary neutron star (BNS) mergers is converted to r-process elements, GW170817-like BNS mergers could fully account for the amount of r-process material observed in the Milky Way.",

keywords = "gravitational waves, methods: data analysis, stars: neutron",

author = "{LIGO Scientific Collaboration and Virgo Collaboration} and Abbott, {B. P.} and R. Abbott and Abbott, {T. D.} and F. Acernese and K. Ackley and C. Adams and T. Adams and P. Addesso and Adhikari, {R. X.} and Adya, {V. B.} and C. Affeldt and M. Afrough and B. Agarwal and M. Agathos and K. Agatsuma and N. Aggarwal and Aguiar, {O. D.} and L. Aiello and A. Ain and P. Ajith and B. Allen and G. Allen and A. Allocca and Altin, {P. A.} and A. Amato and A. Ananyeva and Anderson, {S. B.} and Anderson, {W. G.} and Aston, {S. M.} and C. Austin and Bader, {M. K.M.} and J. Bartlett and C. Beer and Bell, {A. S.} and Berry, {C. P.L.} and Bilenko, {I. A.} and J. Blackman and Blair, {C. D.} and Blair, {D. G.} and M. Boer and S. Bose and Brady, {P. R.} and Brooks, {A. F.} and Brown, {D. D.} and Buchanan, {C. C.} and H. Cao and J. Cao and M. Chan and Chen, {H. Y.} and X. Chen and Y. Chen and Cheng, {H. P.} and H. Chia and Q. Chu and Chua, {A. J.K.} and S. Chua and Chung, {A. K.W.} and S. Chung and Clark, {J. A.} and D. Cohen and Cooper, {S. J.} and Costa, {C. A.} and Cowan, {E. E.} and Coward, {D. M.} and A. Cumming and L. Cunningham and Danilishin, {S. L.} and D. Davis and J. Degallaix and R. Douglas and Dwyer, {S. E.} and Edwards, {M. C.} and A. Effler and M. Evans and Evans, {T. M.} and X. Fan and Farr, {W. M.} and Fisher, {R. P.} and M. Fletcher and Forsyth, {P. W.F.} and Ganija, {M. R.} and D. George and J. George and S. Ghosh and L. Glover and S. Gras and C. Gray and Green, {A. C.} and X. Guo and A. Gupta and Gupta, {M. K.} and Hall, {E. D.} and Hamilton, {E. Z.} and G. Hammond and J. Hanson and Hart, {M. J.} and Heng, {I. S.} and K. Holt and P. Hopkins and Houston, {E. A.} and Howell, {E. J.} and Hu, {Y. M.} and Iyer, {B. R.} and Johnson, {W. W.} and Jones, {D. I.} and R. Jones and L. Ju and G. Kang and R. Kennedy and Key, {J. S.} and I. Khan and S. Khan and Z. Khan and Chunglee Kim and Kim, {J. C.} and K. Kim and Kim, {Y. M.} and King, {E. J.} and King, {P. J.} and Knowles, {T. D.} and P. Kumar and R. Kumar and S. Kumar and L. Kuo and S. Kwang and Lai, {K. H.} and Lang, {R. N.} and J. Lange and Lasky, {P. D.} and Lee, {C. H.} and Lee, {H. K.} and Lee, {H. M.} and Lee, {H. W.} and K. Lee and Li, {T. G.F.} and J. Liu and X. Liu and R. Lynch and Y. Ma and Macleod, {D. M.} and Magee, {R. M.} and N. Man and Martin, {R. M.} and K. Mason and R. McCarthy and McClelland, {D. E.} and McGuire, {S. C.} and G. McIntyre and McManus, {D. J.} and T. McRae and McWilliams, {S. T.} and H. Miao and H. Middleton and Miller, {A. L.} and Miller, {B. B.} and J. Miller and S. Mitra and Moore, {C. J.} and Muir, {A. W.} and S. Mukherjee and Murray, {P. G.} and K. Napier and Ng, {K. K.Y.} and Nguyen, {T. T.} and D. Nichols and Oh, {S. H.} and M. Oliver and Ottaway, {D. J.} and J. Page and Page, {M. A.} and B. Pang and W. Parker and J. Powell and Pratt, {J. W.W.} and J. Read and S. Reid and W. Ren and Robertson, {N. A.} and R. Romano and Ross, {M. P.} and K. Ryan and Sanders, {J. R.} and Savage, {R. L.} and J. Schmidt and J. Scott and Scott, {S. M.} and Shah, {A. A.} and A. Singh and Slagmolen, {B. J.J.} and B. Smith and Smith, {J. R.} and Smith, {R. J.E.} and Spencer, {A. P.} and Srivastava, {A. K.} and Stevenson, {S. P.} and R. Stone and Strigin, {S. E.} and L. Sun and Sutton, {P. J.} and C. Talbot and Taylor, {J. A.} and R. Taylor and Thomas, {E. G.} and M. Thomas and P. Thomas and S. Tiwari and M. Tse and {Van Heijningen}, {J. V.} and Veitch, {P. J.} and Vine, {D. J.} and Vyatchanin, {S. P.} and Wade, {L. E.} and M. Walker and L. Wallace and S. Walsh and G. Wang and H. Wang and Wang, {J. Z.} and Wang, {W. H.} and Wang, {Y. F.} and Ward, {R. L.} and J. Warner and Wei, {L. W.} and Weinstein, {A. J.} and R. Weiss and L. Wen and Whelan, {J. T.} and D. Williams and Williams, {R. D.} and Williamson, {A. R.} and Willis, {J. L.} and Wong, {K. W.K.} and Wright, {J. L.} and Wu, {D. S.} and Wysocki, {D. M.} and S. Xiao and H. Yamamoto and L. Yang and Yap, {M. J.} and Hang Yu and Haocun Yu and L. Zhang and M. Zhang and T. Zhang and Zhang, {Y. H.} and C. Zhao and M. Zhou and Z. Zhou and Zhu, {S. J.} and Zhu, {X. J.}",

year = "2017",

month = dec,

day = "1",

doi = "10.3847/2041-8213/aa9478",

language = "English",

volume = "850",

journal = "The Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing",

number = "2",

}