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Title: Magnetized Outflows from Short-lived Neutron Star Merger Remnants Can Produce a Blue Kilonova
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 × 10−1Ms−1. We find that the ejecta in our simulations underproducer-process abundances beyond the secondr-process peak. For sufficiently long-lived remnants, these outflowsalonecan produce blue kilonovae, including the blue kilonova component observed for AT2017gfo.

 
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NSF-PAR ID:
10486554
Author(s) / Creator(s):
; ; ; ; ; ; ;
Publisher / Repository:
DOI PREFIX: 10.3847
Date Published:
Journal Name:
The Astrophysical Journal Letters
Volume:
961
Issue:
1
ISSN:
2041-8205
Format(s):
Medium: X Size: Article No. L26
Size(s):
["Article No. L26"]
Sponsoring Org:
National Science Foundation
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