Full transport model of GW170817-like disk produces a blue kilonova

Miller, Jonah Maxwell; Ryan, Benjamin Ransom; Dolence, Joshua C.; Burrows, Adam; Fontes, Christopher John; Fryer, Christopher Lee; Korobkin, Oleg; Lippuner, Jonas; Mumpower, Matthew Ryan; Wollaeger, Ryan Thomas

doi:10.1103/PhysRevD.100.023008

Title: Full transport model of GW170817-like disk produces a blue kilonova

Journal Article · 18 July 2019 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.100.023008 · OSTI ID:1570643

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^[1]; Burrows, Adam ^[2];

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Princeton Univ., NJ (United States)

The 2017 detection of the inspiral and merger of two neutron stars in gravitational waves and gamma rays was accompanied by a quickly reddening transient. Such a transient was predicted to occur following a rapid neutron capture (r-process) nucleosynthesis event, which synthesizes neutron-rich, radioactive nuclei and can take place in both dynamical ejecta and in the wind driven off the accretion torus formed after a neutron star merger. In this study, we present the first three-dimensional general relativistic, full transport neutrino radiation magnetohydrodynamics simulations of the black hole-accretion disk-wind system produced by the GW170817 merger. We show that the small but non-negligible optical depths lead to neutrino transport globally coupling the disk electron fraction, which we capture by solving the transport equation with a Monte Carlo method. The resulting absorption drives up the electron fraction in a structured, continuous outflow, with electron fraction as high as Y_e ~ 0.4 in the extreme polar region. Finally, we show via nuclear reaction network and radiative transfer calculations that nucleosynthesis in the disk wind will produce a blue kilonova.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: 89233218CNA000001; SC0018297; 20170508DR

OSTI ID:: 1570643

Alternate ID(s):: OSTI ID: 1546476

Report Number(s):: LA-UR-19-22623; PRVDAQ; TRN: US2100146

Journal Information:: Physical Review D, Vol. 100, Issue 2; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 116 works

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r-Process Lanthanide Production and Heating Rates in Kilonovae Lippuner, Jonas; Roberts, Luke F. arXiv https://doi.org/10.48550/arxiv.1508.03133	text	January 2015
Electromagnetic Signatures of Neutron Star Mergers in the Advanced LIGO Era Fernández, Rodrigo; Metzger, Brian D. arXiv https://doi.org/10.48550/arxiv.1512.05435	text	January 2015
The Influence of Neutrinos on r-Process Nucleosynthesis in the Ejecta of Black Hole-Neutron Star Mergers Roberts, Luke F.; Lippuner, Jonas; Duez, Matthew D. arXiv https://doi.org/10.48550/arxiv.1601.07942	text	January 2016
Signatures of hypermassive neutron star lifetimes on r-process nucleosynthesis in the disk ejecta from neutron star mergers Lippuner, Jonas; Fernández, Rodrigo; Roberts, Luke F. arXiv https://doi.org/10.48550/arxiv.1703.06216	text	January 2017
Impact of ejecta morphology and composition on the electromagnetic signatures of neutron star mergers Wollaeger, Ryan T.; Korobkin, Oleg; Fontes, Christopher J. arXiv https://doi.org/10.48550/arxiv.1705.07084	text	January 2017
On the use of tracer particles in simulations of binary neutron stars Bovard, Luke; Rezzolla, Luciano arXiv https://doi.org/10.48550/arxiv.1705.07882	text	January 2017
The X-ray counterpart to the gravitational wave event GW 170817 Troja, E.; Piro, L.; van Eerten, H. arXiv https://doi.org/10.48550/arxiv.1710.05433	text	January 2017
Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger Kasliwal, M. M.; Nakar, E.; Singer, L. P. arXiv https://doi.org/10.48550/arxiv.1710.05436	text	January 2017
Swift and NuSTAR observations of GW170817: detection of a blue kilonova Evans, P. A.; Cenko, S. B.; Kennea, J. A. arXiv https://doi.org/10.48550/arxiv.1710.05437	text	January 2017
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. IV. Detection of Near-infrared Signatures of r-process Nucleosynthesis with Gemini-South Chornock, R.; Berger, E.; Kasen, D. arXiv https://doi.org/10.48550/arxiv.1710.05454	text	January 2017
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral Collaboration, The LIGO Scientific; Collaboration, The Virgo arXiv https://doi.org/10.48550/arxiv.1710.05832	text	January 2017
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models Cowperthwaite, P. S.; Berger, E.; Villar, V. A. arXiv https://doi.org/10.48550/arxiv.1710.05840	text	January 2017
Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817 Tanaka, Masaomi; Utsumi, Yousuke; Mazzali, Paolo A. arXiv https://doi.org/10.48550/arxiv.1710.05850	text	January 2017
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Modeling GW170817 based on numerical relativity and its implications Shibata, Masaru; Fujibayashi, Sho; Hotokezaka, Kenta arXiv https://doi.org/10.48550/arxiv.1710.07579	text	January 2017
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Supernova Fallback: A Possible Site for the r-Process Fryer, Chris L.; Herwig, Falk; Hungerford, Aimee arXiv https://doi.org/10.48550/arxiv.astro-ph/0606450	text	January 2006
Gamma-Ray Bursts as the Death Throes of Massive Binary Stars Narayan, Ramesh; Paczyński, Bohdan; Piran, Tsvi arXiv https://doi.org/10.48550/arxiv.astro-ph/9204001	text	January 1992
The Dynamics and Outcomes of Rapid Infall onto Neutron Stars Fryer, Chris L.; Benz, Willy; Herant, Marc arXiv https://doi.org/10.48550/arxiv.astro-ph/9509144	text	January 1995
Hyper-Accreting Black Holes and Gamma-Ray Bursts Popham, Robert; Woosley, S. E.; Fryer, Chris arXiv https://doi.org/10.48550/arxiv.astro-ph/9807028	text	January 1998
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Gamma Rays from Kilonova: A Potential Probe of r -process Nucleosynthesis Korobkin, Oleg; Hungerford, Aimee M.; Fryer, Christopher L. The Astrophysical Journal, Vol. 889, Issue 2 https://doi.org/10.3847/1538-4357/ab64d8	journal	February 2020
Can Kilonova Light Curves Be Standardized? Kashyap, Rahul; Raman, Gayathri; Ajith, Parameswaran The Astrophysical Journal, Vol. 886, Issue 1 https://doi.org/10.3847/2041-8213/ab543f	journal	November 2019
Spiral-wave Wind for the Blue Kilonova Nedora, Vsevolod; Bernuzzi, Sebastiano; Radice, David The Astrophysical Journal, Vol. 886, Issue 2 https://doi.org/10.3847/2041-8213/ab5794	journal	November 2019
Gamma-rays from kilonova: a potential probe of r-process nucleosynthesis Korobkin, Oleg; Hungerford, Aimee M.; Fryer, Christopher L. arXiv https://doi.org/10.48550/arxiv.1905.05089	text	January 2019