Work

Turbulence driven by shock-clump interactions and particle acceleration in the turbulence

Year: 2025

Type: conference-paper

Abstract: Some theoretical and observational studies suggest that the plasma around relativistic shock waves, such as gamma-ray bursts or jetted active galactic nuclei, can be turbulent. This turbulence is important for the acceleration of charged particles by relativistic shock waves. We performed the three-dimensional special relativistic simulations in order to understand the downstream turbulence generated by interactions between a relativistic shock wave and density clumps The solenoidal and compressive mode decomposition shows that both modes are comparable, and that their power spectra follow a $-5/3$ slope which is consistent with the Kolmogorov turbulence. The shock-like structures are generated by the interactions, and these can affect the particle acceleration by the relativistic shock waves.

Source: International Cosmic Ray Conference

DOI: 10.22323/1.501.0096

Authors: Kanji Morikawa, Yutaka Ohira, Takumi Ohmura

Institutions: The University of Tokyo, National Astronomical Observatory of Japan, Institute for Cosmic Ray Research

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: University of Tokyo, National Astronomical Observatory of Japan, Japan Society for the Promotion of Science

Awards: G1957627928, Cosmic ray acceleration and the role of cosmic rays in galaxies in the early universe, G3752857035, Exploration of high-energy astrophysical phenomena in star and planet formation processes, G7566727073