8 papers
Cosmological perturbation theory of primordial compact sources
Geoffrey Compère, Sk Jahanur Hoque
We construct a position-space cosmological perturbation theory around spatially flat Friedmann-Lemaître-Robertson-Walker geometries that allows to model localized primordial source…
The flux-balance laws of de Sitter at quadrupolar order
Geoffrey Compère, Sk Jahanur Hoque, Emine Şeyma Kutluk
The linear solution for quadrupolar perturbations around de Sitter spacetime was recently constructed. In this paper, we provide the flux-balance laws for each background symmetry…
The Kerr-de Sitter spacetime in Bondi coordinates
Sk Jahanur Hoque, Amitabh Virmani
We use zero angular momentum null geodesics in the Kerr-de Sitter spacetime to transform the metric in a generalised Bondi coordinate system. We write the metric components explici…
Gravitational multipole moments for asymptotically de Sitter spacetimes
Sumanta Chakraborty, Sk Jahanur Hoque, Roberto Oliveri
We provide a prescription to compute the gravitational multipole moments of compact objects for asymptotically de Sitter spacetimes. Our prescription builds upon a recent definitio…
On the canonical energy of weak gravitational fields with a cosmological constant
P. T. Chruściel, Sk J. Hoque, M. Maliborski +1
We analyse the canonical energy of vacuum linearised gravitational fields on light cones on a de Sitter, Minkowski, and Anti de Sitter backgrounds in Bondi gauge. We derive the ass…
First law of black hole mechanics with fermions
P. B. Aneesh, Sumanta Chakraborty, Sk Jahanur Hoque +1
In the last few years, there has been significant interest in understanding the stationary comparison version of the first law of black hole mechanics in the vielbein formulation o…