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Collapse of a Magnetized Star to a Black Hole
Thomas W. Baumgarte, Stuart L. Shapiro
We study of the collapse of a magnetized spherical star to a black hole in general relativity theory. The matter and gravitational fields are described by the exact Oppenheimer-Sny…
Numerical Relativity and Compact Binaries
Thomas W. Baumgarte, Stuart L. Shapiro
Numerical relativity is the most promising tool for theoretically modeling the inspiral and coalescence of neutron star and black hole binaries, which, in turn, are among the most…
Effects of Differential Rotation on the Maximum Mass of Neutron Stars
Nicholas D. Lyford, Thomas W. Baumgarte, Stuart L. Shapiro
The merger of binary neutron stars is likely to lead to differentially rotating remnants. In this paper we numerically construct models of differentially rotating neutron stars in…
Hydrodynamic Simulations in 3+1 General Relativity
Matthew D. Duez, Pedro Marronetti, Stuart L. Shapiro +1
We solve Einstein's field equations coupled to relativistic hydrodynamics in full 3+1 general relativity to evolve astrophysical systems characterized by strong gravitational field…
Collapse of a Rotating Supermassive Star to a Supermassive Black Hole: Analytic Determination of the Black Hole Mass and Spin
Stuart L. Shapiro, Masaru Shibata
The collapse of a uniformaly rotating, supermassive star (SMS) to a supermassive black hole (SMBH) has been followed recently by means of hydrodynamic simulations in full general r…
Improved numerical stability of stationary black hole evolution calculations
Hwei-Jang Yo, Thomas W. Baumgarte, Stuart L. Shapiro
We experiment with modifications of the BSSN form of the Einstein field equations (a reformulation of the ADM equations) and demonstrate how these modifications affect the stabilit…