Solitonic Aspect of Relativistic Magneto-Fluid Spacetime with Some Specific Vector Fields

Mohd Danish Siddiqi (), Fatemah Mofarreh and Sudhakar Kumar Chaubey
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Mohd Danish Siddiqi: Department of Mathematics, College of Science, Jazan University, Jazan 45142, Saudi Arabia
Fatemah Mofarreh: Mathematical Science Department, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh 11546, Saudi Arabia
Sudhakar Kumar Chaubey: Section of Mathematics, Department of Information Technology, University of Technology and Applied Sciences, P.O. Box 77, Shinas 324, Oman

Mathematics, 2023, vol. 11, issue 7, 1-16

Abstract: The target of the current research article is to investigate the solitonic attributes of relativistic magneto-fluid spacetime (MFST) if its metrics are Ricci–Yamabe soliton (RY-soliton) and gradient Ricci–Yamabe soliton (GRY-soliton). We exhibit that a magneto-fluid spacetime filled with a magneto-fluid density ρ , magnetic field strength H , and magnetic permeability μ obeys the Einstein field equation without the cosmic constant being a generalized quasi-Einstein spacetime manifold ( G Q E ) . In such a spacetime, we obtain an EoS with a constant scalar curvature R in terms of the magnetic field strength H and magnetic permeability μ . Next, we achieve some cauterization of the magneto-fluid spacetime in terms of Ricci–Yamabe solitons with a time-like torse-forming vector field ξ and a φ ( R i c ) vector field. We establish the existence of a black hole in the relativistic magneto-fluid spacetime by demonstrating that it admits a shrinking Ricci–Yamabe soliton and satisfies the time-like energy convergence criteria. In addition, we examine the magneto-fluid spacetime with a gradient Ricci–Yamabe soliton and deduce some conditions for an equation of state (EoS) ω = − 1 5 with a Killing vector field. Furthermore, we demonstrate that the EoS ω = − 1 5 of the magneto-fluid spacetime under some constraints represents a star model and a static, spherically symmetric perfect fluid spacetime. Finally, we prove that a gradient Ricci–Yamabe soliton with the conditions μ = 0 or H = 2 ; μ ≠ 0 , H > 2 and obeying the equation of state ω = − 1 5 is conceded in a magneto-fluid spacetime, and a naked singularity with a Cauchy horizon subsequently emerges, respectively.

Keywords: magneto-fluid spacetime; Einstein’s field equations; energy momentum tensor; Ricci–Yamabe solitons; gradient Ricci–Yamabe solitons (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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