102 citations · 357 across the 23 of their papers we have counts for
23 papers
The Vaidya metric: expected and unexpected traits of evaporating black holes
Julius Piesnack, Klaus Kassner
The ingoing Vaidya metric is introduced as a model for a non-rotating uncharged black hole emitting Hawking radiation. This metric is expected to capture the physics of the spaceti…
Reduction of a family of metric gravities
Klaus Kassner
A recent proposal by Shuler regarding a postulate-based derivation of a family of metrics describing the gravitational field outside a static spherically symmetric mass distributio…
Radially falling test particle approaching an evaporating black hole
Klaus Kassner
A simple model for an evaporating non-rotating black hole is considered, employing a global time that does not become singular at the putative horizon. The dynamics of a test parti…
Dust ball physics and the Schwarzschild metric
Klaus Kassner
A physics-first derivation of the Schwarzschild metric is given. Gravitation is described in terms of the effects of tidal forces (or of spacetime curvature) on the volume of a sma…
Why ghosts don't touch: a tale of two adventurers falling one after another into a black hole
Klaus Kassner
The case for the utility of Kruskal-Szekeres coordinates in classroom made by Augousti et al. in this journal (Eur. J. Phys. 33:1--11, 2012) is strengthened by extending their disc…
A Physics-First Approach to the Schwarzschild Metric
Klaus Kassner
As is well-known, the Schwarzschild metric cannot be derived based on pre-general-relativistic physics alone, which means using only special relativity, the Einstein equivalence pr…