Global monopoles in f(R) gravity

ULU DOĞRU M., Taser D.

MODERN PHYSICS LETTERS A, cilt.30, sa.40, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 40
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1142/s021773231550217x
  • Dergi Adı: MODERN PHYSICS LETTERS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Modified gravity, monopoles, black holes, wormholes, GRAVITATIONAL-WAVES, DARK ENERGY
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

In this study, we investigate whether global monopoles cause black holes or wormholes to form. Field equations for static spherically symmetric spacetimes with global monopoles are obtained in f(R) gravity. We found exact solutions for the field equations without using any perturbation or approximation methods. It is shown that the obtained f(R) function is in accordance with the Lambda-cold dark matter (Lambda-CDM) model. Also, it is shown that the static spherically symmetric spacetimes associated with global monopoles form black holes or wormhole structures under some restrictions. Finally, geometrical and physical results of the solutions are discussed.