4 papers
Invariant description of static and dynamical Brans-Dicke spherically symmetric models
Nicholas Layden, Alan Coley, Dipanjan Dey
We investigate spherically symmetric static and dynamical Brans-Dicke theory exact solutions using invariants and, in particular, the Newman Penrose formalism utilizing Cartan scal…
Gravitational collapse of matter in the presence of Quintessence and Phantom-like scalar fields
Priyanka Saha, Dipanjan Dey, Kaushik Bhattacharya
In this work, we propose a model of the gravitational collapse of dark matter in the presence of quintessence or phantom-like scalar fields. Our treatment is based on the principle…
Tidal forces in the Simpson-Visser black-bounce and wormhole spacetimes
Dhruv Arora, Parth Bambhaniya, Dipanjan Dey +1
The concept of regular black holes has gained attention in recent years, especially in the context of quantum gravity theories. In these theories, the existence of singularities is…
The equilibrium condition in gravitational collapse and its application to a cosmological scenario
Dipanjan Dey, N. T. Layden, A. A. Coley +1
We discuss the equilibrium conditions of the gravitational collapse of a spherically symmetric matter cloud. We analyze the spinor structure of a general collapsing space-time and…