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Dirty black holes: Quasinormal modes for "squeezed" horizons
A. J. M. Medved, Damien Martin, Matt Visser
We consider the quasinormal modes for a class of black hole spacetimes that, informally speaking, contain a closely ``squeezed'' pair of horizons. (This scenario, where the relevan…
Dirty black holes: Quasinormal modes
A J M Medved, Damien Martin, Matt Visser
In this paper, we investigate the asymptotic nature of the quasinormal modes for "dirty" black holes -- generic static and spherically symmetric spacetimes for which a central blac…
Jerk, snap, and the cosmological equation of state
Matt Visser
Taylor expanding the cosmological equation of state around the current epoch is the simplest model one can consider that does not make any a priori restrictions on the nature of th…
Probing semiclassical analogue gravity in Bose--Einstein condensates with widely tunable interactions
Carlos Barcelo, Stefano Liberati, Matt Visser
Bose-Einstein condensates (BEC) have recently been the subject of considerable study as possible analogue models of general relativity. In particular it was shown that the propagat…
Bounds on the interior geometry and pressure profile of static fluid spheres
Damien Martin, Matt Visser
It is a famous result of relativistic stellar structure that (under mild technical conditions) a static fluid sphere satisfies the Buchdahl--Bondi bound 2M/R <= 8/9; the surprise h…
Algorithmic construction of static perfect fluid spheres
Damien Martin, Matt Visser
Perfect fluid spheres, both Newtonian and relativistic, have attracted considerable attention as the first step in developing realistic stellar models (or models for fluid planets)…