Black hole binary formation in AGN discs: from isolation to merger
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 524:2 (2023) 2770-2796
Prevention of core particle depletion in stellarators by turbulence
Physical Review Research American Physical Society 5:2 (2023) L022053
Abstract:
In reactor-relevant plasmas, neoclassical transport drives an outward particle flux in the core of large stellarators and predicts strongly hollow density profiles. However, this theoretical prediction is contradicted by experiments. In particular, in Wendelstein 7-X, the first large optimized stellarator, flat or weakly peaked density profiles are generally measured, indicating that neoclassical theory is not sufficient and that an inward contribution to the particle flux is missing in the core. In this Research Letter, it is shown that the turbulent contribution to the particle flux can explain the difference between experimental measurements and neoclassical predictions. The results of this Research Letter also prove that theoretical and numerical tools are approaching the level of maturity needed for the prediction of equilibrium density profiles in stellarator plasmas, which is a fundamental requirement for the design of operation scenarios of present devices and future reactors.Constraints on the Intergalactic Magnetic Field Using Fermi-LAT and H.E.S.S. Blazar Observations
The Astrophysical Journal Letters American Astronomical Society 950:2 (2023) l16
Secular Spin–Orbit Resonances of Black Hole Binaries in AGN Disks
The Astrophysical Journal American Astronomical Society 950:1 (2023) 48