9 research outputs found
Dynamical Instability of Spherical Anisotropic Sources in Gravity
In this paper, we study the effects of modification of gravity on the problem
of dynamical instability of the spherical relativistic anisotropic interiors.
We have considered non-zero influence of expansion scalar throughout during the
evolutionary phases of spherical geometry that led to the use of fluid
stiffness parameter. The modified hydrostatic equation for the stellar
anisotropic matter distributions is constructed and then solved by using radial
perturbation scheme. Such a differential equation can be further used to obtain
instability constraints at both weak field and post-Newtonian approximations
after considering a particular Harrison-Wheeler equation of state. This
approach allows us to deal with the effects of usual and effective matter
variables on the stability exotic stellar of self-gravitating structures.Comment: 24 pages, no figure, version accepted for publication in the European
Physical Journal
Trends in laboratoryādiagnosed onychomycosis between 2006 and 2014 in the South West of England
Study of generalized LemaĆ®treāTolmanāBondi spacetime in Palatini
The objective of this paper is to investigate the continuation of LemaĆ®treāTolmanāBondi (LTB) space-time for dissipative dust configuration in the direction of Palatini f(R) theory. In this context, the generalized form of field and dynamical equations will be formulated. We explore the effects of kinematical variables and curvature invariant on our proposed fluid configuration. The significance of Palatini f(R) scalar variables computing through the orthogonal splitting of Riemann-tensor for dissipative dust spheres will be reported. Furthermore, two subcases of LTB space-time have been carried out to note down its symmetric aspects. It is revealed that extended LTB space-time has characteristics comparable to that of LTB and computed scalar variables in both situations have identical dependance on source profile even under the effects of Palatini technique