288 citations · 298 across the 16 of their papers we have counts for
16 papers
pynucastro 3: A community library for nuclear astrophysics
Zhi Chen, Khanak Bhargava, Eric T. Johnson +8
We describe the latest release of pynucastro: a community python library for nuclear astrophysics. The goal of the pynucastro project is to build the tools needed to interactively…
AMReX-Astrophysics Microphysics: A set of microphysics routines for astrophysical simulation codes based on the AMReX library
Astro Microphysics Team, Khanak Bhargava, Abigail Bishop +15
The AMReX-Astrophysics Microphysics library provides a common set of microphysics routines (reaction networks and associated physics, equations of state, and various transport coef…
Multi-dimensional Models of Mixed H/He Flames in X-ray Bursts
Eric T. Johnson, Michael Zingale
We investigate the properties of mixed H/He flames in X-ray bursts using 2D hydrodynamic simulations. We find that as the initial hydrogen abundance of the atmosphere increases, th…
Numerical Treatment of Shock-Induced Nuclear Burning in Double Detonation Type Ia Supernovae
Ryan Brady, Michael Zingale
We present a benchmark problem to assess the treatment of shock-induced nuclear burning in the context of double detonation Type Ia supernovae. In a stratified white dwarf model, w…
Multidimensional Nova Simulations with an Extended Buffer and Lower Initial Mixing Temperatures
Alexander Smith Clark, Michael Zingale
A classical nova is a thermonuclear runaway initiated on a white dwarf accreting solar-like material from its stellar companion. Once the white dwarf accretes enough mass, the pres…
3D Convective Urca Process in a Simmering White Dwarf
Brendan Boyd, Alan Calder, Dean Townsley +1
A proposed setting for thermonuclear (Type Ia) supernovae is a white dwarf that has gained mass from a companion to the point of carbon ignition in the core. In the early stages of…
The Challenges of Modeling Astrophysical Reacting Flows
Michael Zingale, Khanak Bhargava, Ryan Brady +5
Stellar evolution is driven by the changing composition of a star from nuclear reactions. At the late stages of evolution and during explosive events, the timescale can be short an…
Hydrodynamical simulations of proton ingestion flashes in Type I X-ray Bursts
Simon Guichandut, Michael Zingale, Andrew Cumming
We perform the first multidimensional fluid simulations of thermonuclear helium ignition underneath a hydrogen-rich shell. This situation is relevant to Type I X-ray bursts on neut…
Strong Coupling of Hydrodynamics and Reactions in Nuclear Statistical Equilibrium for Modeling Convection in Massive Stars
Michael Zingale, Zhi Chen, Eric T. Johnson +2
We build on the simplified spectral deferred corrections (SDC) coupling of hydrodynamics and reactions to handle the case of nuclear statistical equilibrium (NSE) and electron/posi…
Simulating Lateral H/He Flame Propagation in Type I X-ray Bursts
Eric T. Johnson, Michael Zingale
X-ray bursts are the thermonuclear runaway of a mixed H/He layer on the surface of a neutron star. Observations suggest that the burning begins locally and spreads across the surfa…
A Fully Explicit Integrator for Modeling Astrophysical Reactive Flows
Parker Johnson, Michael Zingale, Eric T. Johnson +2
Simulating complex astrophysical reacting flows is computationally expensive -- reactions are stiff and typically require implicit integration methods. The reaction update is often…
A Framework for Exploring Nuclear Physics Sensitivity in Numerical Simulations
Zhi Chen, Eric T. Johnson, Max Katz +3
We describe the AMReX-Astrophysics framework for exploring the sensitivity of astrophysical simulations to the details of a nuclear reaction network, including the number of nuclei…
pynucastro 2.1: an update on the development of a python library for nuclear astrophysics
Alexander Smith Clark, Eric T. Johnson, Zhi Chen +5
pynucastro is a python library that provides visualization and analyze techniques to classify, construct, and evaluate nuclear reaction rates and networks. It provides tools that a…
Sensitivity of 3D Convective Urca Simulations to Changes in Urca Reactions
Brendan Boyd, Alexander Smith Clark, Alan C. Calder +2
A proposed setting for thermonuclear (Type Ia) supernovae is a white dwarf that has gained mass from a companion to the point of carbon ignition in the core. There is a simmering p…
MESA-Web: A cloud resource for stellar evolution in astronomy curricula
Carl E. Fields, Richard H. D. Townsend, A. L. Dotter +2
We present MESA-Web, a cloud resource with an online interface to the Modules for Experiments in Stellar Astrophysics (MESA) software instrument. MESA-Web allows learners to evolve…
CASTRO: A New Compressible Astrophysical Solver. I. Hydrodynamics and Self-Gravity
A. S. Almgren, V. E. Beckner, J. B. Bell +7
We present a new code, CASTRO, that solves the multicomponent compressible hydrodynamic equations for astrophysical flows including self-gravity, nuclear reactions and radiation. C…