Chaplygin gas

Chaplygin gas

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 p=-A/\rho^\alpha where p is the pressure, \rho is the density, with \alpha=1 and A a positive constant. The substance is named after Sergey Chaplygin.

In some models, generalized Chaplygin gas is considered, where \alpha is a parameter which can take on values 0 < \alpha \le 1.

See also


  1. ^ Kamenshchik, Alexander Yu.; Moschellai, Ugo; Pasquier, Vincent (2001), "An alternative to quintessence", Phys. Lett. B 511 (2-4): 265,  
  2. ^ Bento, M. C.; Bertolami, O.; Sen, A. A. (2002), "Generalized Chaplygin gas, accelerated expansion and dark energy-matter unification", Phys. Rev. 66 (4): 043507,