Publications (16)
A Comparison Between Nonlinear Force-Free Field and Potential Field Models Using Full-Disk SDO/HMI Magnetogram
Tilaye Tadesse, T. Wiegelmann, B. Inhester +3
Measurements of magnetic fields and electric currents in the pre-eruptive corona are crucial to study solar eruptive phenomena, like flare and coronal mass ejections(CMEs). However…
In-plane angular dependence of superconducting gaps in FeSe probed by high resolution specific heat measurements
H. Cercellier, K. Olson, M. Schuchard +4
The influence of a rotating magnetic field (in the plane) on the density of states has been investigated in the superconducting state of the nematic FeSe superconductor using…
Mapping Initial Hydrostatic Models in Godunov Codes
M. Zingale, L. J. Dursi, J. ZuHone +12
We look in detail at the process of mapping an astrophysical initial model from a stellar evolution code onto the computational grid of an explicit, Godunov type code while maintai…
The Response of Model and Astrophysical Thermonuclear Flames to Curvature and Stretch
L. J. Dursi, M. Zingale, A. C. Calder +11
Critically understanding the `standard candle'-like behavior of Type Ia supernovae requires understanding their explosion mechanism. One family of models for Type Ia Supernovae beg…
Morphology of Rising Hydrodynamic and Magneto-hydrodynamic Bubbles from Numerical Simulations
K. Robinson, L. J. Dursi, P. M. Ricker +11
Recent Chandra and XMM-Newton observations of galaxy cluster cooling flows have revealed X-ray emission voids of up to 30 kpc in size that have been identified with buoyant, magnet…
Investigations of Pointwise Ignition of Helium Deflagrations on Neutron Stars
M. Zingale, S. E. Woosley, A. Cumming +7
We look at the spreading of localized temperature perturbations in the accreted fuel layer of a non-rotating neutron star. The pressure at the base of the accreted fuel layer is la…
The Structure of Cosmic String Wakes
A. Sornborger, R. Brandenberger, B. Fryxell +1
The clustering of baryons and cold dark matter induced by a single moving string is analyzed numerically making use of a new three-dimensional Eulerian cosmological hydro code$^{1)…
Simulations of Astrophysical Fluid Instabilities
A. C. Calder, B. Fryxell, R. Rosner +7
We present direct numerical simulations of mixing at Rayleigh-Taylor unstable interfaces performed with the FLASH code, developed at the ASCI/Alliances Center for Astrophysical The…
The Structure of Cosmic String Wakes (Proceedings)
A. Sornborger, R. Brandenberger, B. Fryxell +1
We present results of a cosmological hydrodynamical study of gravitational accretion in cosmic string wakes and filaments. Cosmic string wakes are formed by fast moving (v ~ c) str…
Modeling coronal magnetic field using spherical geometry: cases with several active regions
Tilaye Tadesse, T. Wiegelmann, K. Olson +1
The magnetic fields in the solar atmosphere structure the plasma, store free magnetic energy and produce a wide variety of active solar phenomena, like flare and coronal mass eject…
On Heavy Element Enrichment in Classical Novae
A. Alexakis, A. C. Calder, A. Heger +10
Many classical nova ejecta are enriched in CNO and Ne. Rosner et al. recently suggested that the enrichment might originate in the resonant interaction between large-scale shear fl…
Onset of Convectionon a Pre-Runaway White Dwarf
L. J. Dursi, A. C. Calder, A. Alexakis +7
Observed novae abundances and explosion energies estimated from observations indicate that there must be significant mixing of the heavier material of the white dwarf (C+O) into th…
Large-Scale Simulations of Clusters of Galaxies
P. M. Ricker, A. C. Calder, L. J. Dursi +9
We discuss some of the computational challenges encountered in simulating the evolution of clusters of galaxies. Eulerian adaptive mesh refinement (AMR) techniques can successfully…
Mixing by Non-linear Gravity Wave Breaking on a White Dwarf Surface
A. C. Calder, A. Alexakis, L. J. Dursi +7
We present the results of a simulation of a wind-driven non-linear gravity wave breaking on the surface of a white dwarf. The ``wind'' consists of H/He from an accreted envelope, a…
On Validating an Astrophysical Simulation Code
A. C. Calder, B. Fryxell, T. Plewa +15
We present a case study of validating an astrophysical simulation code. Our study focuses on validating FLASH, a parallel, adaptive-mesh hydrodynamics code for studying the compres…
An Eulerian PPM & PIC Code for Cosmological Hydrodynamics
A. Sornborger, B. Fryxell, K. Olson +1
We present a method for integrating the cosmological hydrodynamical equations including a collisionless dark matter component. For modelling the baryonic matter component, we use t…