Abstract
We present a new class of spherically symmetric exact solutions of the general relativistic field equations. These solutions describe perfect fluid balls with infinite central pressure and central density though their ratio is finite. A member of the class has been studied in detail from which we have constructed a model of causal fluid ball with constant sound speed.
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Pant, N. Uniform radial motion of sound in a relativistic fluid ball. Astrophys Space Sci 240, 187–193 (1996). https://doi.org/10.1007/BF00639583
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DOI: https://doi.org/10.1007/BF00639583