Ian Ruchlin
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View article: Numerical generation of vector potentials from specified magnetic fields
Numerical generation of vector potentials from specified magnetic fields Open
View article: Evolutions of unequal mass, highly spinning black hole binaries
Evolutions of unequal mass, highly spinning black hole binaries Open
We evolve a binary black hole system bearing a mass ratio of $q=m_1/m_2=2/3$ and individual spins of $S^z_1/m_1^2=0.95$ and $S^z_2/m_2^2=-0.95$ in a configuration where the large black hole has its spin antialigned with the orbital angular…
View article: Numerical relativity in spherical coordinates with the Einstein Toolkit
Numerical relativity in spherical coordinates with the Einstein Toolkit Open
Numerical relativity codes that do not make assumptions on spatial symmetries most commonly adopt Cartesian coordinates. While these coordinates have many attractive features, spherical coordinates are much better suited to take advantage …
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>SENR</mml:mi><mml:mo>/</mml:mo><mml:mi>NRPy</mml:mi><mml:mo>+</mml:mo></mml:mrow></mml:math>: Numerical relativity in singular curvilinear coordinate systems
: Numerical relativity in singular curvilinear coordinate systems Open
We report on a new open-source, user-friendly numerical relativity code package called SENR/NRPy+. Our code extends previous implementations of the BSSN reference-metric formulation to a much broader class of curvilinear coordinate systems…
View article: Evolutions of nearly maximally spinning black hole binaries using the moving puncture approach
Evolutions of nearly maximally spinning black hole binaries using the moving puncture approach Open
We demonstrate that numerical relativity codes based on the moving punctures\nformalism are capable of evolving nearly maximally spinning black hole\nbinaries. We compare a new evolution of an equal-mass, aligned-spin binary with\ndimensio…
View article: Puncture initial data for black-hole binaries with high spins and high boosts
Puncture initial data for black-hole binaries with high spins and high boosts Open
We solve the Hamiltonian and momentum constraints of general relativity for\ntwo black holes with nearly extremal spins and relativistic boosts in the\npuncture formalism. We use a non-conformally-flat ansatz with an attenuated\nsuperposit…
View article: High energy collisions of black holes numerically revisited
High energy collisions of black holes numerically revisited Open
We use fully nonlinear numerical relativity techniques to study high energy\nhead-on collision of nonspinning, equal-mass black holes to estimate the\nmaximum gravitational radiation emitted by these systems. Our simulations\ninclude impro…
View article: Puncture Initial Data and Evolution of Black Hole Binaries with High Speed and High Spin
Puncture Initial Data and Evolution of Black Hole Binaries with High Speed and High Spin Open
This dissertation explores numerical models of the orbit, inspiral, and merger phases of black hole binaries. We focus on the astrophysically realistic case of black holes with nearly extremal spins, and on high energy black hole collision…