2024
DOI: 10.3847/1538-4357/ad37f9
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On a Spectral Method for β-particle Bound Excitation Collisions in Kilonovae

Ryan T. Wollaeger,
Chris L. Fryer,
Robert M. Chiodi
et al.

Abstract: The interaction of β-particles with the weakly ionized plasma background is an important mechanism for powering the kilonova (KN) transient signal from neutron star mergers. For this purpose, we present an implementation of the approximate fast-particle collision kernel, described by Inokuti following the seminal formulation of Bethe, in a spectral solver of the Vlasov–Maxwell–Boltzmann equation. In particular, we expand the fast-particle plane-wave atomic excitation kernel into coefficients of the Hermite bas… Show more

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