5 research outputs found

    CONFORMAL SYMMETRIES IN SPHERICAL SPACETIMES

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    Conformal vectors and stellar models

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    Static models with conformal symmetry

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    Spherical conformal models for compact stars

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    Abstract We consider spherical exact models for compact stars with anisotropic pressures and a conformal symmetry. The conformal symmetry condition generates an integral relationship between the gravitational potentials. We solve this condition to find a new anisotropic solution to the Einstein field equations. We demonstrate that the exact solution produces a relativistic model of a compact star. The model generates stellar radii and masses consistent with PSR J1614-2230, Vela X1, PSR J1903+327 and Cen X-3. A detailed physical examination shows that the model is regular, well behaved and stable. The mass–radius limit and the surface red shift are consistent with observational constraints

    Perioperative patient outcomes in the African Surgical Outcomes Study: a 7-day prospective observational cohort study

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