...

  • Home
  • Articles
    • Current Issue
    • Archives
  • Authors
    • Author Guidelines
    • Policies
    • Downloads
  • Editors
  • Reviewers
...

International Journal of Mathematics Trends and Technology

Research Article | Open Access | Download PDF

Volume 69 | Issue 1 | Year 2023 | Article Id. IJMTT-V69I1P501 | DOI : https://doi.org/10.14445/22315373/IJMTT-V69I1P501

Bianchi Type-VIII String Cosmological Model in the Presence of Magnetic Field in General Relativity


Dhirendra Chhajed, Ankita Choudhary, Atul Tyagi
Received Revised Accepted Published
12 Nov 2022 20 Dec 2022 02 Jan 2023 14 Jan 2023
Abstract

Bianchi type-VIII string cosmological model in the presence of magnetic field in general relativity is investigated. We assume that the current is flowing along x-axis so magnetic field is in the yz- plane. Thus F23 is the at most surviving constituent of electromagnetic field tensor Fij. For the complete deterministic of the model, we assume that 𝜎 ∝ 𝛳 which leads to 𝐴 = 𝐵 𝑛 where A and B are the metric potentials and n is constant; σ is the scalar shear tensor and 𝛳 is the expansion in the model. The general solution of the Einstein’s field equations for the cosmological model have been obtained under the assumption ρ - 𝜆 = 0 where ρ and 𝜆 are the rest energy density and string tension density of fluid, respectively. The physical and geometrical characteristics of the model in the presence of magnetic field are discussed.

Keywords
Bianchi type-VIII, Magnetic field, String, General relativity.
References

[1] Atul Tyagi, Keerti Sharma, and Payal Jain, “Bianchi Type IX String Cosmological Models for Perfect Fluid Distribution in General Relativity,” Chinesse Physics Letters, vol. 27, no. 7, pp. 1-3, 2010. Crossref, http://dx.doi.org/10.1088/0256-307X/27/7/079801
[2] A. Vilenkin, “Cosmic strings,” Physical Review D, vol. 24, no.8, pp. 2082-2089, 1981. Crossref, https://doi.org/10.1103/PhysRevD.24.2082
[3] Dhirendra Chhajed, Ankita Choudhary, and Atul Tyagi, “Magnetized Bianchi type III String Cosmological Model for Anti-Stiff Fluid in General Relativity,” Journal of Rajasthan Academy of Physical Sciences, vol. 20, no. 3 & 4, pp. 195-206, 2021.
[4] Dieter Lorentz, “Exact Bianchi type VIII and Type IX Cosmological Models with Matter and Electromagnetic Fields,” Physical Review D, vol. 22, no. 8, pp. 1848-1852, 1980. Crossref, https://doi.org/10.1103/PhysRevD.22.1848
[5] Diksha Trivedi, and A.K. Bhabor, “A Higher-Dimensional LRS Bianchi type-V String Cosmological Model in Brans-Dicke Scalar-Tensor Theory of Gravitation,” International Journal of Mathematics Trends and Technology, vol. 67, no. 2, pp. 20-28, 2021. Crossref, https://doi.org/10.14445/22315373/IJMTT-V67I2P504
[6] G. Mohanty, R. R. Sahoo, and K. L. Mahanta, “Five Dimensional LRS Bianchi Type-I String Cosmological Model in Saez and Ballester theory,” Astrophysics and Space Science, vol. 312, pp. 321-324, 2007. Crossref, https://doi.org/10.1007/s10509-007-9697-z
[7] G. P. Singh, “String Cosmology with Electromagnetic Fields in Bianchi Types II, VIII and IX Space-Time,” Nuovo Cimento B, vol. 110, no.12, pp. 1463-1471, 1995. Crossref, https://doi.org/10.1007/BF02849844
[8] Hassan Amirhashchi, “String Cosmology in Bianchi type- VI0 Dusty Universe with Electromagnetic Field,” Pramana Journal of Physics, vol. 80, no. 4, pp. 723-738, 2013. Crosssref, https://doi.org/10.1007/s12043-013-0513-8
[9] John Stachel, “Thickening the String. I. The String Perfect Dust,” Physical Review D, vol. 21, no. 8, p. 2171, 1980. Crossref, https://doi.org/10.1103/PhysRevD.21.2171
[10] K.S. Adhav, and I. D. Pawade, “Bianchi Type VIII Cosmological Model with Linear Equation of State,” International Journal of Science and Advanced Technology, vol. 3, no. 10, pp. 30-33, 2013.
[11] M.A.H. MacCallum, “A Class of Homogeneous Cosmological Models III: Asymptotic Behaviour,” Communications in Mathematical Physics, vol. 20, no. 1, pp. 57-84, 1971. Crossref, https://doi.org/10.1007/BF01646733
[12] Patricio S. Letelier, “Clouds of Strings in General Relativity,” Physical Review D, vol. 20, no. 6, pp. 1294-1302, 1979. Crossref, https://doi.org/10.1103/PhysRevD.20.1294
[13] Patricio S. Letelier, “String Cosmologies,” Physical Review D, vol. 28, no. 10, pp. 2414-2419, 1983. Crossref, https://doi.org/10.1103/PhysRevD.28.2414
[14] Raj Bali, and Shilpi Jain, “Bianchi Type III Non-Static Magnetized Cosmological Model for Perfect Fluid Distribution in General Relativity,” Astrophysics and Space Science, vol. 311, no. 4, pp. 401-406, 2007. Crossref, https://doi.org/10.1007/s10509-007-9552-2
[15] Raj Bali, and Swati, “Bianchi Type VIII Inflationary Universe with Massless Scalar Field in General Relativity,” Prespacetime Journal, vol. 6, no. 8, pp. 679- 683, 2015.
[16] Raj Bali, “Bianchi Type-V Magnetized String Dust Universe with Variable Magnetic Permeability,” Electronic Journal of Theoretical Physics, vol. 5, no. 19, pp. 105-114, 2008.
[17] T. W. B. Kibble, “Topology of Cosmic Domains and Strings,” Journal of Physics A: Mathematical and General, vol. 9, no. 8, pp. 1387- 1398, 1976. Crossref, https://doi.org/10.1088/0305-4470/9/8/029
[18] Uma Maheswara Rao Velagapudi, Kuppili V. S. Sireesha, and Vijaya Santhi Mandangi, “Bianchi Types II, VIII, and IX String Cosmological Models with Bulk Viscosity in a Theory of Gravitation,” ISRN Mathematical Physics, vol. 2012, no. 4, pp. 1-15, 2011. Crossref, https://doi.org/10.5402/2012/341612
[19] Ya. B. Zel’sdovich, I. Yu. Kokzarev, and L. B. Okun, “Cosmological Consequences of a Spontaneous Breakdown of a Discrete Symmetry,” Soviet Physics JETP, vol. 40, no. 1, pp. 1-5, 1975.

Citation :

Dhirendra Chhajed, Ankita Choudhary, Atul Tyagi, "Bianchi Type-VIII String Cosmological Model in the Presence of Magnetic Field in General Relativity," International Journal of Mathematics Trends and Technology (IJMTT), vol. 69, no. 1, pp. 1-7, 2023. Crossref, https://doi.org/10.14445/22315373/IJMTT-V69I1P501

  • PDF
  • Abstract
  • Keywords
  • References
  • Citation
Abstract Keywords References Citation
  • Home
  • Authors Guidelines
  • Paper Submission
  • APC
  • Archives
  • Downloads
  • Open Access
  • Publication Ethics
  • Copyrights Infringement
  • Journals
  • FAQ
  • Contact Us

Follow Us

Copyright © 2025 Seventh Sense Research Group® . All Rights Reserved