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This https://arxiv.org/abs/2504.19845 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Synchrotron Circular Polarization in Gamma-Ray Burst Prompt Optical Emission: Relativistic Thermal Electron Contribution
Synchrotron circular polarization of a non-thermal power-law electron distribution in gamma-ray bursts (GRBs) has been studied. However, some numerical simulations have shown that the resulting distribution of electrons is a combination of a thermal component and a non-thermal power-law component. In this paper, we investigate synchrotron circular polarization using such a hybrid energy distribution of relativistic thermal and nonthermal electrons within a globally toroidal magnetic field in GR…

Simulations of the churning mode: toroidally symmetric plasma convection and turbulence around the X-points in a snowflake divertor
D Power, M V Umansky, V A Soukhanovskii
https://arxiv.org/abs/2505.21223

Simulations of the churning mode: toroidally symmetric plasma convection and turbulence around the X-points in a snowflake divertor
Using a reduced MHD model, extended to include field-aligned thermal conduction, we present numerical simulations of the churning mode (CM): a toroidally symmetric, non-linear plasma vortex in the vicinity of the null points in a snowflake (SF) divertor (Ryutov et al., Phys. Scr. 89 088002, 2014). Simulations are carried out across a range of inter-null separations, $d_{xx}$, and inter-null orientations, $θ$, primarily in conditions relevant to the MAST-U tokamak. We find that, when $d_{xx}$ i…