Chaplygin gas

Chaplygin gas, 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 .

Chaplygin gas

Chaplygin gas, 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 .