Some properties of the "String gas" with the equation of state p = -rho/3
classification
🌀 gr-qc
keywords
equationpropertiesratherstatestringbizzarechangecurves
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We show that the string gas - a perfect fluid with the equation of state $p = -\frac13 \rho$ possesses rather interesing properties. In Friedmann universes its presence can can change the observable topology of the space; in the spherically symmetric spacetimes it produces rather bizzare geometries and in a way its influence on the rotation curves mimics the dark matter effects.
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