Theoretical astrophysics and plasma physics at RPC

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Detecting Gravitational Wave Bursts From Stellar-Mass Binaries in the Milli-hertz Band

(2023)

Authors:

Zeyuan Xuan, Smadar Naoz, Bence Kocsis, Erez Michaely
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The paradox of infinitesimal granularity: Chaos and the reversibility of time in Newton’s theory of gravity

AIP Conference Proceedings AIP Publishing 2872:1 (2023) 050003

Authors:

Simon Portegies Zwart, Tjarda Boekholt
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Black Hole Binaries in AGN Accretion Discs II: Gas Effects on Black Hole Satellite Scatterings

(2023)

Authors:

Connar Rowan, Henry Whitehead, Tjarda Boekholt, Bence Kocsis, Zoltán Haiman
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Gas Assisted Binary Black Hole Formation in AGN Discs

(2023)

Authors:

Henry Whitehead, Connar Rowan, Tjarda Boekholt, Bence Kocsis
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Fast Ion Isotropization by Current Sheet Scattering in Magnetic Reconnection Jets.

Physical review letters 131:11 (2023) 115201

Authors:

Louis Richard, Yuri V Khotyaintsev, Daniel B Graham, Andris Vaivads, Daniel J Gershman, Christopher T Russell

Abstract:

We present a statistical analysis of ion distributions in magnetic reconnection jets using data from the Magnetospheric Multiscale spacecraft. Compared with the quiet plasma in which the jet propagates, we often find anisotropic and non-Maxwellian ion distributions in the plasma jets. We observe magnetic field fluctuations associated with unstable ion distributions, but the wave amplitudes are not large enough to scatter ions during the observed travel time of the jet. We estimate that the phase-space diffusion due to chaotic and quasiadiabatic ion motion in the current sheet is sufficiently fast to be the primary process leading to isotropization.
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