37 citations · 179 across the 16 of their papers we have counts for
16 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…
On supertranslation invariant Lorentz charges
Sumanta Chakraborty, Sk Jahanur Hoque, Amitabh Virmani
In recent papers, Fuentealba, Henneaux, and Troessaert (FHT) gave definitions for supertranslation invariant Lorentz charges in the ADM Hamiltonian formalism and showed that their…
de Sitter Teukolsky waves
Harsh, Sk Jahanur Hoque, Sitender Pratap Kashyap +1
We present de Sitter Teukolsky waves -- linearised quadrupolar gravitational waves in the transverse-traceless gauge in de Sitter spacetime. In the cosmological constant going…
Quadrupolar radiation in de Sitter: Displacement memory and Bondi metric
Geoffrey Compère, Sk Jahanur Hoque, Emine Şeyma Kutluk
We obtain the closed form expression for the metric perturbation around de Sitter spacetime generated by a matter source below Hubble scale both in generalized harmonic gauge and i…
Supertranslations at Timelike Infinity
Sumanta Chakraborty, Debodirna Ghosh, Sk Jahanur Hoque +2
We propose a definition of asymptotic flatness at timelike infinity in four spacetime dimensions. We present a detailed study of the asymptotic equations of motion and the action o…
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…
Energy of weak gravitational waves in spacetimes with a positive cosmological constant
P. T. Chruściel, Sk Jahanur Hoque, Tomasz Smołka
We derive a formula for the total canonical energy, and its flux, of weak gravitational waves on a de Sitter background.
Conserved charges in asymptotically de Sitter spacetimes
P B Aneesh, Sk Jahanur Hoque, Amitabh Virmani
We present a covariant phase space construction of hamiltonian generators of asymptotic symmetries with `Dirichlet' boundary conditions in de Sitter spacetime, extending a previous…
On Propagation of Energy Flux in de Sitter Spacetime
Sk Jahanur Hoque, Amitabh Virmani
In this paper, we explore propagation of energy flux in the future Poincaré patch of de Sitter spacetime. We present two results. First, we compute the flux integral of energy usin…
Quadrupolar power radiation by a binary system in de Sitter Background
Sk Jahanur Hoque, Ankit Aggarwal
Cosmological observations over past couple of decades favor our universe with a tiny positive cosmological constant. Presence of cosmological constant not only imposes theoretical…
Cosmological Horizon and the Quadrupole Formula in de Sitter Background
Ghanashyam Date, Sk Jahanur Hoque
An important class of observables for gravitational waves consists of the fluxes of energy, momentum and angular momentum carried away by them and are well understood for weak grav…
Gravitational Waves from Compact Sources in de Sitter Background
Ghanashyam Date, Sk Jahanur Hoque
The concordance model of cosmology favours a universe with a tiny positive cosmological constant. A tiniest positive constant curvature, profoundly alters the asymptotic structure,…