45 citations · 135 across the 11 of their papers we have counts for
6 papers · 1 filter
Photon spheres, ISCOs, and OSCOs: Astrophysical observables for regular black holes with asymptotically Minkowski cores
Thomas Berry, Alex Simpson, Matt Visser
Classical black holes contain a singularity at their core. This has prompted various researchers to propose a multitude of modified spacetimes that mimic the physically observable…
Darboux diagonalization of the spatial 3-metric in Kerr spacetime
Joshua Baines, Thomas Berry, Alex Simpson +1
The astrophysical importance of the Kerr spacetime cannot be overstated. Of the currently known exact solutions to the Einstein field equations, the Kerr spacetime stands out in te…
Thin-shell traversable wormhole crafted from a regular black hole with asymptotically Minkowski core
Thomas Berry, Francisco S. N. Lobo, Alex Simpson +1
Recently, a novel model for a regular black hole was advocated which possesses an asymptotically Minkowski core implemented via an exponential suppression (in the core region) of t…
Unit-lapse versions of the Kerr spacetime
Joshua Baines, Thomas Berry, Alex Simpson +1
The Kerr spacetime is perhaps the most astrophysically important of the currently known exact solutions to the Einstein field equations. Whenever spacetimes can be put in unit-laps…
Painleve-Gullstrand form of the Lense-Thirring spacetime
Joshua Baines, Thomas Berry, Alex Simpson +1
The standard Lense-Thirring metric is a century-old slow-rotation large-distance approximation to the gravitational field outside a rotating massive body, depending only on the tot…
Relativistic combination of non-collinear 3-velocities using quaternions
Thomas Berry, Matt Visser
Quaternions have an (over a century-old) extensive and quite complicated interaction with special relativity. Since quaternions are intrinsically 4-dimensional, and do such a good…