A New Code for Relativistic Hydrodynamics and its Application to FR II Radio Jets. Issue Volume 16:Issue S362(2020) (June 2020)

• Record Type: Journal Article
• Authors: Seo, Jeongbhin; Kang, Hyesung; Ryu, Dongsu
• Editors: Bisikalo, Dmitry; Wiebe, Dmitri; Boily, Christian
• Is Part Of: Proceedings of the International Astronomical Union. Volume 16:Issue S362(2020)
• Page Start: 87
• Page End: 93
• Publication Date: 2020-06
• Subjects: hydrodynamics -- galaxies: jets -- methods: numerical -- relativistic processes; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921322001314
• Languages: English
• ISSNs: 1743-9213

Abstract

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.