300 citations · 2.6k across the 72 of their papers we have counts for
72 papers
Covariant Dynamical Systems Formulation of the Tolman-Oppenheimer-Volkoff Equations
Eduardo Bittencourt, Mariam Campbell, Peter K. S. Dunsby +1
We revisit static, spherically symmetric perfect-fluid stellar models in General Relativity within the framework of the semi-tetrad formalism. For locally rotationally symm…
A complete correspondence between the Newman-Penrose and 1+1+2 formalisms
Abbas M Sherif, Peter K S Dunsby
We establish a correspondence between the Newman-Penrose and 1+1+2 semitetrad covariant formalisms by expressing all Newman-Penrose spin coefficients, Ricci scalars, and Weyl scala…
Bouncing cosmologies in the presence of a Dirac-Born-Infeld field
Mariam Campbell, Richard Daniel, Peter K. S. Dunsby +1
We perform a detailed dynamical system analysis for the behaviour of a Dirac-Born-Infeld (DBI) field in a spatially closed Friedmann-Lemaître-Robertson-Walker (FLRW) cosmology. The…
Causal dynamics of null horizons under linear perturbations
Peter K. S. Dunsby, Seoktae Koh, Abbas M. Sherif
We study the causal dynamics of an embedded null horizon foliated by marginally outer trapped surfaces (MOTS) for a locally rotationally symmetric background spacetime subjected to…
A dynamical systems formulation for inhomogeneous LRS-II spacetimes
Saikat Chakraborty, Peter K. S. Dunsby, Rituparno Goswami +1
We present a dynamical system formulation for inhomogeneous LRS-II spacetimes using the covariant 1+1+2 decomposition approach. Our approach describes the LRS-II dynamics from the…
Some exact relativistic star solutions in gravity
Mariam Campbell, Sante Carloni, Peter K. S. Dunsby +1
We present a covariant description of non-vacuum static spherically symmetric spacetimes in gravity applying the (1+1+2) covariant formalism. The propagation equations are t…