Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-07-06
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, 5 figures; v2 reference and footnote added; v3 slight reordering of content, new section added with further analysis
Scientific paper
10.1088/0264-9381/25/20/205010
An analysis of radiating perfect fluid models with asymptotically AdS boundary conditions is presented. Such scenarios consist of a spherical gas of radiation (a "star") localised near the centre of the spacetime due to the confining nature of the AdS potential. We consider the variation of the total mass of the star as a function of the central density, and observe that for large enough dimensionality, the mass increases monotonically with the density. However in the lower dimensional cases, oscillations appear, indicating that the perfect fluid model of the star is becoming unrealistic. We find the critical dimension separating these two regimes to be eleven.
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