New exact solutions of Bianchi I, Bianchi III and Kantowski-Sachs spacetimes in scalar-coupled gravity theories via Noether gauge symmetries

Creative Commons License

Camci U., YILDIRIM A., OZ I. B.

ASTROPARTICLE PHYSICS, cilt.76, ss.29-37, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 76
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.astropartphys.2015.12.006
  • Dergi Adı: ASTROPARTICLE PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.29-37
  • Anahtar Kelimeler: Bianchi I spacetime, Bianchi III spacetime, Kantowski-Sachs spacetime, Scalar-coupled theory of gravity, Noether gauge symmetry, COSMOLOGICAL CONSTANT, INFLATION, ANISOTROPY
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The Noether symmetry approach is useful tool to restrict the arbitrariness in a gravity theory when the equations of motion are underdetermined due to the high number of functions to be determined in the ansatz. We consider two scalar-coupled theories of gravity, one motivated by induced gravity, the other more standard; in Bianchi I, Bianchi III and Kantowski-Sachs cosmological models. For these models, we present a full set of Noether gauge symmetries, which are more general than those obtained by the strict Noether symmetry approach in our recent work. Some exact solutions are derived using the first integrals corresponding to the obtained Noether gauge symmetries. (C) 2015 Elsevier B.V. All rights reserved.