2D particle-in-cell simulations reveal that weakly magnetized quasi-parallel shocks transition from Bell-dominated (inefficient electron acceleration) to Weibel-dominated (efficient electron acceleration) regimes at an Alfvénic Mach number of ~100.
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A new Bayesian analysis of VLBI observations of GW170817's jet afterglow constrains the viewing angle to 16.8-19.2 degrees and measures H0 = 65.5 ± 4.4 km s^{-1} Mpc^{-1}, closer to Planck than SH0ES values.
SN 2025ulz, once a kilonova candidate for GW trigger S250818k, is a type IIb supernova, and type IIb shock-cooling tails should be expected as interlopers in roughly 30% of comparable GW follow-ups.
Overview of SKAO's role in radio follow-up of GW events, GRB afterglows, and kilonovae for system characterization and population studies.
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Dependence of Particle Acceleration Efficiency on Shock Velocity in Weakly Magnetized Electron-Ion Shocks
2D particle-in-cell simulations reveal that weakly magnetized quasi-parallel shocks transition from Bell-dominated (inefficient electron acceleration) to Weibel-dominated (efficient electron acceleration) regimes at an Alfvénic Mach number of ~100.
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Revisiting GW170817 at milliarcsecond scale: high-precision constraints on jet geometry and $H_0$
A new Bayesian analysis of VLBI observations of GW170817's jet afterglow constrains the viewing angle to 16.8-19.2 degrees and measures H0 = 65.5 ± 4.4 km s^{-1} Mpc^{-1}, closer to Planck than SH0ES values.
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ENGRAVE follow-up of a type IIb supernova spatially coincident with the sub-threshold gravitational wave trigger S250818k
SN 2025ulz, once a kilonova candidate for GW trigger S250818k, is a type IIb supernova, and type IIb shock-cooling tails should be expected as interlopers in roughly 30% of comparable GW follow-ups.
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Gamma-ray Bursts and Kilonovae from Gravitational Wave Events
Overview of SKAO's role in radio follow-up of GW events, GRB afterglows, and kilonovae for system characterization and population studies.