COSMOS: A Radiation-Chemo-Hydrodynamics Code for Astrophysical Problems

Abstract

We have developed a new massively-parallel radiation-hydrodynamics code (Cosmos) for Newtonian and relativistic astrophysical problems that also includes radiative cooling, self-gravity, and non-equilibrium, multi-species chemistry. Several numerical methods are implemented for the hydrodynamics, including options for both internal and total energy conserving schemes. Radiation is treated using flux-limited diffusion. The chemistry incorporates 27 reactions, including both collisional and radiative processes for atomic hydrogen and helium gases, and molecular hydrogen chains. In this paper we discuss the equations and present results from test problems carried out to verify the robustness and accuracy of our code in the Newtonian regime. An earlier paper presented tests of the relativistic capabilities of Cosmos.

29 pages, 15 figures, to appear in Astrophysical Journal Supplement Series

References in corpus (4)

• Modelling Primordial Gas in Numerical Cosmology
• Cosmological Hydrodynamics with Multi-Species Chemistry and Nonequilibrium Ionization and Cooling
• Non-Oscillatory Central Difference and Artificial Viscosity Schemes for Relativistic Hydrodynamics
• Supernova Enrichment of Dwarf Spheroidal Galaxies

Cited by in corpus (17)

• Grackle: a Chemistry and Cooling Library for Astrophysics
• Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited
• Special Relativistic Simulations of Magnetically-dominated Jets in Collapsing Massive Stars
• Radiative Shock-Induced Collapse of Intergalactic Clouds
• Cosmos++: Relativistic Magnetohydrodynamics on Unstructured Grids with Local Adaptive Refinement
• Magnetohydrodynamic Simulations of Shock Interactions with Radiative Clouds
• The Supernova Triggered Formation and Enrichment of Our Solar System
• Numerical Simulations of a Jet-Cloud Collision and Starburst: Application to Minkowski's Object
• Energy Dissipation in Multi-Phase Infalling Clouds in Galaxy Halos
• Ejection of Supernova-Enriched Gas From Dwarf Disk Galaxies
• Gas Accretion by Globular Clusters and Nucleated Dwarf Galaxies and the Formation of the Arches and Quintuplet Clusters
• Supernova Enrichment of Dwarf Spheroidal Galaxies
• Dynamical Bar-Mode Instability in Differentially Rotating Magnetized Neutron Stars
• CosmosDG: An hp-Adaptive Discontinuous Galerkin Code for Hyper-Resolved Relativistic MHD
• General Relativistic Implicit Monte Carlo Radiation-Hydrodynamics
• Divergence-Free Magnetohydrodynamics on Conformally Moving, Adaptive Meshes Using a Vector Potential Method
• Roche Lobe Overflow from Dwarf Stellar Systems