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Chaplygin gas

Hypothetical substance used in certain cosmological theories From Wikipedia, the free encyclopedia

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Chaplygin gas,[1][2] which occurs in certain theories of cosmology, is a hypothetical substance that satisfies an exotic equation of state in the form , where is the pressure, is the density, with and a positive constant. The substance is named after Sergey Chaplygin.

In some models, generalized Chaplygin gas is considered, where is a parameter, which can take on values .

A slowly rotating spherically symmetric, non-viscous, self-gravitating Chapligin gas solves the Hubble tension.[3]

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