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Bounds on the interior geometry and pressure profile of static fluid spheres | | Damien Martin
; Matt Visser
; | | Date: |
10 Jun 2003 | | Journal: | Class.Quant.Grav. 20 (2003) 3699-3716 | | Subject: | gr-qc | | Affiliation: | Victoria University of Wellington) and Matt Visser (Victoria University of Wellington | | Abstract: | 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 here being that the bound is not 2M/R <= 1. In this article we provide further generalizations of this bound by placing a number of constraints on the interior geometry (the metric components), on the local acceleration due to gravity, on various combinations of the internal density and pressure profiles, and on the internal compactness 2m(r)/r of static fluid spheres. We do this by adapting the standard tool of comparing the generic fluid sphere with a Schwarzschild interior geometry of the same mass and radius -- in particular we obtain several results for the pressure profile (not merely the central pressure) that are considerably more subtle than might first be expected. | | Source: | arXiv, gr-qc/0306038 | | Services: | Forum | Review | PDF | Favorites | |
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