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Speaker |
Konopka, Tomasz |
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Talk Title |
Static Isotropic Spacetimes with Radially Imperfect Fluids |
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Abstract |
When solving the equations of General Relativity in a symmetric sector, it is natural to consider the same symmetry for the geometry and stress-energy. This implies that for static and isotropic spacetimes, the most general natural stress-energy tensor can be written as a sum of a perfect-fluid and a radial imperfect-fluid component. In the special situations where the perfect-fluid vanishes or describes a cosmological constant, the solutions to Einstein's equations can be thought of as modified Schwarzschild and Schwarzschild-de Sitter spaces. I will describe the geometric properties of these solutions, summarize how solar-system observations constrain the magnitude of the imperfect-fluid component, and mention under what circumstances this component can describe dark-matter-like effects. |
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