Magnetized Outflows from Short-lived Neutron Star Merger Remnants Can Produce a Blue Kilonova
Sanjana CurtisAnton Pannekoek Institute for Astronomy, Institute of High-Energy Physics, and Institute of Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands; [email protected]P. BoschAnton Pannekoek Institute for Astronomy, Institute of High-Energy Physics, and Institute of Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands; [email protected]Philipp MöstaAnton Pannekoek Institute for Astronomy, Institute of High-Energy Physics, and Institute of Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands; [email protected]David RadiceDepartment of Astronomy & Astrophysics, The Pennsylvania State University, University Park, PA 16802, USASebastiano BernuzziTheoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, GermanyAlbino PeregoDipartimento di Fisica, Universitá di Trento, Via Sommarive 14, I-38123 Trento, ItalyRoland HaasDepartment of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois, USAErik SchnetterCenter for Computation & Technology, Louisiana State University, Baton Rouge, LA, USA
2024en
ABI
Abstract
Abstract We present a 3D general-relativistic magnetohydrodynamic simulation of a short-lived neutron star remnant formed in the aftermath of a binary neutron star merger. The simulation uses an M1 neutrino transport scheme to track neutrino–matter interactions and is well suited to studying the resulting nucleosynthesis and kilonova emission. A magnetized wind is driven from the remnant and ejects neutron-rich material at a quasi-steady-state rate of 0.8 × 10 −1 M ⊙ s −1 . We find that the ejecta in our simulations underproduce r -process abundances beyond the second r -process peak. For sufficiently long-lived remnants, these outflows alone can produce blue kilonovae, including the blue kilonova component observed for AT2017gfo.
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