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94 papers
Challenges in Quasinormal Mode Extraction: Perspectives from Numerical solutions to the Teukolsky Equation
Hengrui Zhu, Justin L. Ripley, Alejandro Cárdenas-Avendaño +1
The intricacies of black hole ringdown analysis are amplified by the absence of a complete set of orthogonal basis functions for quasinormal modes. Although damped sinusoids effect…
A Survey of Gravitational Waves
Frans Pretorius
We review the state of the field of gravitational wave astrophysics, framing the challenges, current observations, and future prospects within the context of the predictions of Ein…
Causal, stable first-order viscous relativistic hydrodynamics with ideal gas microphysics
Alex Pandya, Elias R. Most, Frans Pretorius
We present the first numerical analysis of causal, stable first-order relativistic hydrodynamics with ideal gas microphysics, based in the formalism developed by Bemfica, Disconzi,…
Binary neutron star mergers in Einstein-scalar-Gauss-Bonnet gravity
William E. East, Frans Pretorius
Binary neutron star mergers, which can lead to less massive black holes relative to other known astrophysical channels, have the potential to probe modifications to general relativ…
Conservative finite volume scheme for first-order viscous relativistic hydrodynamics
Alex Pandya, Elias R. Most, Frans Pretorius
We present the first conservative finite volume numerical scheme for the causal, stable relativistic Navier-Stokes equations developed by Bemfica, Disconzi, Noronha, and Kovtun (BD…
Dynamics and Observational Signatures of Shell-like Black Hole Mimickers
Ulf Danielsson, Luis Lehner, Frans Pretorius
We undertake the task of studying the non-linear dynamics of quantum gravity motivated alternatives to black holes that in the classical limit appear as ultra-compact shells of mat…