1. HARM3D+NUC: A New Method for Simulating the Post-merger Phase of Binary Neutron Star Mergers with GRMHD, Tabulated EOS, and Neutrino Leakage
- Author
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Michael Kolacki, Luke F. Roberts, Tanmayee Gupte, Scott C. Noble, Leonardo R. Werneck, Ariadna Murguia-Berthier, Manuela Campanelli, Julian H. Krolik, Jeremy D. Schnittman, Jesus M. Rueda-Becerril, Lorenzo Ennoggi, Grace Fiacco, Bernard J. Kelly, Brendan Drachler, Joshua A. Faber, Riccardo Ciolfi, Bruno Giacomazzo, Yosef Zlochower, Richard O'Shaughnessy, Yossef Zenati, Enrico Ramirez-Ruiz, Ben Margalit, Federico Cipolletta, Mark J. Avara, Zachariah B. Etienne, Federico G. Lopez Armengol, Trung Ha, Tim Moon, Murguia-Berthier, A, Noble, S, Roberts, L, Ramirez-Ruiz, E, Werneck, L, Kolacki, M, Etienne, Z, Avara, M, Campanelli, M, Ciolfi, R, Cipolletta, F, Drachler, B, Ennoggi, L, Faber, J, Fiacco, G, Giacomazzo, B, Gupte, T, Ha, T, Kelly, B, Krolik, J, Lopez Armengol, F, Margalit, B, Moon, T, O'Shaughnessy, R, Rueda-Becerril, J, Schnittman, J, Zenati, Y, and Zlochower, Y
- Subjects
High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,FOS: Physical sciences ,Library science ,Astronomy and Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,06 humanities and the arts ,0603 philosophy, ethics and religion ,01 natural sciences ,General Relativity and Quantum Cosmology ,numerical relativity, accretion disks ,Neutron star ,Accretion disc ,Space and Planetary Science ,060302 philosophy ,0103 physical sciences ,Blue Waters ,Space Science ,Neutrino ,Nuclear Experiment ,Astrophysics - High Energy Astrophysical Phenomena ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
The first binary neutron star merger has already been detected in gravitational waves. The signal was accompanied by an electromagnetic counterpart including a kilonova component powered by the decay of radioactive nuclei, as well as a short $\gamma$-ray burst. In order to understand the radioactively-powered signal, it is necessary to simulate the outflows and their nucleosynthesis from the post-merger disk. Simulating the disk and predicting the composition of the outflows requires general relativistic magnetohydrodynamical (GRMHD) simulations that include a realistic, finite-temperature equation of state (EOS) and self-consistently calculating the impact of neutrinos. In this work, we detail the implementation of a finite-temperature EOS and the treatment of neutrinos in the GRMHD code HARM3D+NUC, based on HARM3D. We include formal tests of both the finite-temperature EOS and the neutrino leakage scheme. We further test the code by showing that, given conditions similar to those of published remnant disks following neutron star mergers, it reproduces both recombination of free nucleons to a neutron-rich composition and excitation of a thermal wind., Comment: 19 pages, 14 figures, published in ApJ
- Published
- 2021