111 citations · 184 across the 6 of their papers we have counts for
7 papers · 1 filter
Cosmographic Hubble fits to the supernova data
Celine Cattoen, Matt Visser
The Hubble relation between distance and redshift is a purely cosmographic relation that depends only on the symmetries of a FLRW spacetime, but does not intrinsically make any dyn…
Cosmography: Extracting the Hubble series from the supernova data
Celine Cattoen, Matt Visser
We perform a number of inter-related cosmographic fits to the legacy05 and gold06 supernova datasets. We pay particular attention to the influence of both statistical and systemati…
Generalized Puisieux series expansion for cosmological milestones
Celine Cattoen, Matt Visser
We use generalized Puisieux series expansions to determine the behaviour of the scale factor in the vicinity of typical cosmological milestones occurring in a FRW universe. We desc…
Cosmological milestones and energy conditions
Celine Cattoen, Matt Visser
Until recently, the physically relevant singularities occurring in FRW cosmologies had traditionally been thought to be limited to the "big bang", and possibly a "big crunch". Howe…
Cosmological milestones and gravastars - topics in general relativity
Celine Cattoen
In this thesis, we consider two different problems relevant to general relativity. Over the last few years, opinions on physically relevant singularities occurring in FRW cosmologi…
Gravastars must have anisotropic pressures
Celine Cattoen, Tristan Faber, Matt Visser
One of the very small number of serious alternatives to the usual concept of an astrophysical black hole is the "gravastar" model developed by Mazur and Mottola; and a related phas…