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A New Code for Relativistic Hydrodynamics and its Application to FR II Radio Jets

Published online by Cambridge University Press:  20 January 2023

Jeongbhin Seo Open the ORCID record for Jeongbhin Seo [Opens in a new window] ,
Hyesung Kang  and
Dongsu Ryu Open the ORCID record for Dongsu Ryu [Opens in a new window]
Jeongbhin Seo
Affiliation:
Department of Earth Sciences, Pusan National University, Busan 46241, Korea
Hyesung Kang
Affiliation:
Department of Earth Sciences, Pusan National University, Busan 46241, Korea
Dongsu Ryu
Affiliation:
Department of Physics, UNIST, Ulsan, 44919, Korea
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Abstract

To study the dynamics of relativistic flows in astrophysical objects such as radio jets, we have developed a new special relativistic hydrodynamic (RHD) code based on the weighted essentially non-oscillatory (WENO) scheme, a high-order finite difference scheme. The code includes different WENO versions, and high-order time integration methods such as the 4th-order accurate Runge-Kutta (RK4) and strong stability preserving RK (SSPRK), as well as the equations of state (EOSs) that closely approximate the EOS of the single-component perfect gas in relativistic regime. Additionally, it is optimized for the reproduction of complex structures in multi-dimensional flows, and implements a modification of eigenvalues for the acoustic modes to effectively control carbuncle instability. As the first application of the code, we have simulated ultra-relativistic jets of FR II radio galaxies, and studied the nonlinear flow structures, such as shocks, velocity shear, and turbulence, through large-scale.

Keywords

hydrodynamicsgalaxies: jetsmethods: numericalrelativistic processes
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S362: The Predictive Power of Computational Astrophysics as a Discovery Tool , June 2020 , pp. 87 - 93
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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