49 citations · 241 across the 11 of their papers we have counts for
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gr-qc1994★ 40 cited
Optical scalars in spherical spacetimes
E. Malec, N. Ó Murchadha
Consider a spherically symmetric spacelike slice through a spherically symmetric spacetime. One can derive a universal bound for the optical scalars on any such slice. The only req…
gr-qc1994★ 12 cited
Event horizons and apparent horizons in spherically symmetric geometries
Edward Malec
Spherical configurations that are very massive must be surrounded by apparent horizons. These in turn, when placed outside a collapsing body, have a fixed area and must propagate o…
gr-qc1994★ 48 cited
Trapped surfaces and the Penrose inequality in spherically symmetric geometries
Edward Malec, Niall Ó Murchadha
We demonstrate that the Penrose inequality is valid for spherically symmetric geometries even when the horizon is immersed in matter. The matter field need not be at rest. The only…