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.

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

See also

References

  1. ^ Kamenshchik, Alexander Yu.; Moschella, Ugo; Pasquier, Vincent (2001), "An alternative to quintessence", Phys. Lett. B. 511 (2–4): 265, arXiv:gr-qc/0103004. Bibcode:2001PhLB..511..265K. doi:10.1016/S0370-2693(01)00571-8. S2CID 14097770
  2. ^ Bento, M. C.; Bertolami, O.; Sen, A. A. (2002), "Generalized Chaplygin gas, accelerated expansion and dark energy-matter unification", Phys. Rev.. 66 (4), arXiv:gr-qc/0202064. Bibcode:2002PhRvD..66d3507B. doi:10.1103/PhysRevD.66.043507. S2CID 119357931
  3. ^ Szigeti, Balázs Endre; Szapudi, István; Barna, Imre Ferenc; Barnaföldi, Gergely Gábor (2025). "Can Rotation Solve the Hubble Puzzle?". Monthly Notices of the Royal Astronomical Society. 538 (4): 3038–3041. arXiv:2503.13525. doi:10.1093/mnras/staf446