Non-linearity of Vaidya spacetime and forces in the central naked singularity

Authors

DOI:

https://doi.org/10.33910/2687-153X-2022-3-2-81-85

Keywords:

Vaidya spacetime, naked singularity, strength of singularity, inertial forces, geodesics, gravitational collapse

Abstract

The paper focuses on non-linear Vaidya spacetime, i. e., cases when the mass function has a non-linear form M(v) ≡ λvn , λ > 0, n > 1. We prove that the central naked singularity might form for values n > 1, however, under such conditions it will be gravitationally weak. The paper also disucsses forces in the naked singularity and proves that they might be finite only in the case of the gravitationally weak naked singularity. It also focuses on the strength of the singularity. We prove that the strong naked singularity might form only in the linear case. The singularity might also be gravitationally strong in the case of black hole formation.

References

Dwivedi, I. H., Joshi, P. S. (1989) On the nature of naked singularities in Vaidya spacetimes. Classical and Quantum Gravity, 6 (11), artuicle 1599. https://doi.org/10.1088/0264-9381/6/11/013 (In English)

Landau, L. D., Lifshitz, E. M. (1980) Course of theoretical physics series. Vol. 2. The classical theory of fields. 4th ed. Oxford: Butterworth-Heinemann Publ., 444 p. (In English)

Nolan, B. C. (1999) Strengths of singularities in spherical symmetry. Physical Review D, 60 (2), article 024014. https://doi.org/10.1103/PhysRevD.60.024014 (In English)

Poisson, E. (2004) A relativist’s toolkit: The mathematics of black-hole mechanics. Cambridge: Cambridge University Press, 233 p. (In English)

Tipler, F. J. (1977) Singularities in conformally flat spacetimes. Physics Letters A, 64 (1), 8–10. https://doi.org/10.1016/0375-9601(77)90508-4 (In English)

Vaidya, P. C., Raychaudhuri, A. K., Dadhich, N. (1985) A random walk in relativity and cosmology: Essays in honour of P. C. Vaidya and A. K. Raychaudhuri. New York: Wiley Publ., 236 p. (In English)

Published

30.06.2022

Issue

Section

Theoretical Physics