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  • 1
    Publication Date: 2016-03-18
    Description: In this paper, we have investigated the role of different fluid parameters particularly electromagnetic field and f ( R ) corrections on the evolution of cylindrical compact object. We have explored the modified field equations, kinematical quantities and dynamical equations. An expression for the mass function has been found in comparison with the Misner–Sharp formalism in modified gravity, after which different mass–radius diagrams are drawn. The coupled dynamical transport equation have been formulated to discuss the role of thermoinertial effects on the inertial mass density of the cylindrical relativistic interior. Finally, we have presented a framework, according to which all possible solutions of the metric f ( R )-Maxwell field equations coupled with static fluid can be written through set of scalar functions. It is found that modified gravity induced by Lagrangians f ( R ) = α R 2 , f ( R ) = α R 2 – β R and $f(R)=\frac{\alpha R^2-\beta R}{1+\gamma R}$ are likely to host more massive cylindrical compact objects with smaller radii as compared to general relativity.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 2
    Publication Date: 2016-11-24
    Description: This manuscript explores the unstable/stable regimes of self-gravitating matter configuration of spherical star due to the impact of modification in gravity model as studied in f ( R , T , R T ) theory. We have designed our analysis by keeping the system in hydrostatic equilibrium initially and then moved it into the non-static phase. The dynamical as well as collapse equations are established by using the field equations and Bianchi identities. Using a particular equation of state, we have checked the effects of adiabatic index on the unstable/stable regions of the collapsing model. The influence of dark source terms is also examined with flat background metric and with some known profile of the geometry. We found that the extra curvature invariants of f ( R , T , R T ) gravity has greatly modified collapse rate due to their repulsive nature.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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