Monster shocks, gamma-ray bursts and black hole quasi-normal modes from neutron-star collapse
arxiv(2024)
摘要
We perform the first magnetohydrodynamic simulation tracking the
magnetosphere of a collapsing magnetar. The collapse is expected for massive
rotating magnetars formed in merger events, and it may occur many hours after
the merger. The results suggest a novel gamma-ray burst (GRB) scenario, which
creates a delayed high- energy counterpart of the merger gravitational waves.
The collapse launches an outgoing magnetospheric shock, and a hot magnetized
outflow forms behind the shock. The outflow is modulated by the ring-down of
the nascent black hole, imprinting its kilohertz quasi-normal modes on the GRB
tail.
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