72 citations · 96 across the 6 of their papers we have counts for
6 papers
"It's getting away from us!" - Black Hole Horizons and Relative Speed
Markus Pössel
Black holes hold considerable fascination for the general public and students alike, and are commonly included in general-science courses on astronomy or modern physics. But teachi…
Black holes, Achilles and the original tortoise coordinate
Markus Pössel
The "frozen star" picture of black holes, based on the fact that an outside observer will never see a collapsing sphere shrink sufficiently to form a black hole horizon, was a hist…
Scalar field effects on the orbit of S2 star
António Amorim, Michael Bauböck, Myriam Benisty +35
Precise measurements of the S-stars orbiting SgrA* have set strong constraints on the nature of the compact object at the centre of the Milky Way. The presence of a black hole in t…
Teaching cosmology with special relativity: Piecewise inertial frames as a model for cosmic expansion
Markus Pössel
This article presents a simple model that reproduces key concepts of modern cosmology within the framework of special relativity, at a level that is suitable for an undergraduate o…
Chronological structure of a Goedel type universe with negative cosmological constant
Klaus Behrndt, Markus Pössel
We show that the Goedel solution of five-dimensional gauged supergravity contains either closed time-like curves through every space-time point or none at all, dependent on the rot…
Hidden symmetries in minimal five-dimensional supergravity
Markus Pössel, Sebastian Silva
We study the hidden symmetries arising in the dimensional reduction of d=5, N=2 supergravity to three dimensions. Extending previous partial results for the bosonic part, we give a…