3 citations · 5 across the 4 of their papers we have counts for
9 papers
The general Penrose inequality: lessons from numerical evidence
Janusz Karkowski, Edward Malec
Formulation of the Penrose inequality becomes ambiguous when the past and future apparent horizons do cross. We test numerically several natural possibilities of stating the inequa…
On conformally flat initial data for Einstein equations
Janusz Karkowski, Edward Malec
We describe conformally flat initial data, with explicitly given analytic extrinsic curvature solving the vacuum momentum constraints. They follow from a solution of Dain and Fried…
On the Penrose Inequality
Edward Malec, Marc Mars, Walter Simon
We summarize results on the Penrose inequality bounding the ADM-mass or the Bondi mass in terms of the area of an outermost apparent horizon for asymptotically flat initial data of…
How loud can Schwarzschild black holes ring?
Janusz Karkowski, Edward Malec, Zdobyslaw Swierczynski
A numerical procedure is described for the maximization of the energy diffusion due to the backscattering of the gravitational radiation. The obtained maxima are solutions dominate…
Schwarzschild black holes and propagation of electromagnetic and gravitational waves
Janusz Karkowski, Edward Malec, Zdobyslaw Swierczynski
Disturbing of a spacetime geometry may result in the appearance of an oscillating and damped radiation - the so-called quasinormal modes. Their periods of oscillations and damping…
How much of the outgoing radiation can be intercepted by Schwarzschildean black holes?
Edward Malec
The Schwarzschild spacetime is for electromagnetic waves like a nonuniform medium with a varying refraction index. A fraction of an outgoing radiation scatters off the curvature of…