Neutron star mergers as sites of r-process nucleosynthesis and short gamma-ray bursts

被引:147
作者
Hotokezaka, Kenta [1 ]
Beniamini, Paz [2 ]
Piran, Tsvi [3 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
[2] George Washington Univ, Dept Phys, Washington, DC 20052 USA
[3] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2018年 / 27卷 / 13期
关键词
Neutron stars; r-process; gamma-ray burst; gravitational waves; DYNAMICAL MASS EJECTION; DELAY-TIME DISTRIBUTION; BLACK-HOLE BINARIES; METAL-POOR STAR; CORE-COLLAPSE; ELECTROMAGNETIC COUNTERPART; DRIVEN WINDS; GRAVITATIONAL-WAVES; PROCESS ELEMENTS; SOLAR-SYSTEM;
D O I
10.1142/S0218271818420051
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Neutron star mergers have been long considered as promising sites of heavy r-process nucleosynthesis. We overview the observational evidence supporting this scenario including: the total amount of r-process elements in the galaxy, extreme metal-poor stars, geological radioactive elemental abundances, dwarf galaxies and short gamma-ray bursts (sGRBs). Recently, the advanced LIGO and Virgo observatories discovered a gravitational-wave signal of a neutron star merger, GW170817, as well as accompanying multi-wavelength electromagnetic (EM) counterparts. The ultra-violet, optical and near infrared (n/R) observations point to r-process elements that have been synthesized in the merger ejecta. The rate and ejected mass inferred from GW170817 and the EM counterparts are consistent with other observations. We however, find that, within the simple one zone chemical evolution models (based on merger rates with reasonable delay time distributions as expected from evolutionary models, or from observations of sGRBs), it is difficult to reconcile the current observations of the Eu abundance history of galactic stars for [Fe/H] greater than or similar to - 1. This implies that to account for the role of mergers in the galactic chemical evolution, we need a galactic model with multiple populations that have different spatial distributions and/or varying formation rates.
引用
收藏
页数:35
相关论文
共 276 条
  • [31] NATAL KICKS AND TIME DELAYS IN MERGING NEUTRON STAR BINARIES: IMPLICATIONS FOR r-PROCESS NUCLEOSYNTHESIS IN ULTRA-FAINT DWARFS AND IN THE MILKY WAY
    Beniamini, Paz
    Hotokezaka, Kenta
    Piran, Tsvi
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2016, 829 (01)
  • [32] Formation of double neutron star systems as implied by observations
    Beniamini, Paz
    Piran, Tsvi
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 456 (04) : 4089 - 4099
  • [33] AN r-PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B
    Berger, E.
    Fong, W.
    Chornock, R.
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2013, 774 (02)
  • [34] Short-Duration Gamma-Ray Bursts
    Berger, Edo
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 52, 2014, 52 : 43 - 105
  • [35] The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. VII. Properties of the Host Galaxy and Constraints on the Merger Timescale
    Blanchard, P. K.
    Berger, E.
    Fong, W.
    Nicholl, M.
    Leja, J.
    Conroy, C.
    Alexander, K. D.
    Margutti, R.
    Williams, P. K. G.
    Doctor, Z.
    Chornock, R.
    Villari, V. A.
    Cowperthwaite, P. S.
    Annis, J.
    Brout, D.
    Brown, D. A.
    Chen, H. -Y.
    Eftekhari, T.
    Frieman, J. A.
    Holz, D. E.
    Metzger, B. D.
    Rest, A.
    Sako, M.
    Soares-Santos, M.
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2017, 848 (02)
  • [36] r-process nucleosynthesis from matter ejected in binary neutron star mergers
    Bovard, Luke
    Martin, Dirk
    Guercilena, Federico
    Arcones, Almudena
    Rezzolla, Luciano
    Korobkin, Oleg
    [J]. PHYSICAL REVIEW D, 2017, 96 (12)
  • [37] ON THE r-PROCESS ENRICHMENT OF DWARF SPHEROIDAL GALAXIES
    Bramante, Joseph
    Linden, Tim
    [J]. ASTROPHYSICAL JOURNAL, 2016, 826 (01)
  • [38] 238U/235U Variations in Meteorites: Extant 247Cm and Implications for Pb-Pb Dating
    Brennecka, G. A.
    Weyer, S.
    Wadhwa, M.
    Janney, P. E.
    Zipfel, J.
    Anbar, A. D.
    [J]. SCIENCE, 2010, 327 (5964) : 449 - 451
  • [39] THE PROPAGATION OF RELATIVISTIC JETS IN EXTERNAL MEDIA
    Bromberg, Omer
    Nakar, Ehud
    Piran, Tsvi
    Sari, Re'em
    [J]. ASTROPHYSICAL JOURNAL, 2011, 740 (02)
  • [40] A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient-GW170817
    Buckley, David A. H.
    Andreoni, Igor
    Barway, Sudhanshu
    Cooke, Jeff
    Crawford, Steven M.
    Gorbovskoy, Evgeny
    Gromadzki, Mariusz
    Lipunov, Vladimir
    Mao, Jirong
    Potter, Stephen B.
    Pretorius, Magaretha L.
    Pritchard, Tyler A.
    Romero-Colmenero, Encarni
    Shara, Michael M.
    Vaisanen, Petri
    Williams, Ted B.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 474 (01) : L71 - L75