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65 papers · 1 filter
Wheeler-DeWitt equation and the late gravitational collapse: effects of factor ordering and the tunneling scenario
Davide Batic, Marek Nowakowski, Neelima Govind Kelkar
We set up the Wheeler-DeWitt (WDW) equation for late gravitational collapse. The fact that the gravitational collapse and the expanding/ collapsing universe can be described within…
Axisymmetric Solutions to Einstein Field Equations via Integral Transforms
D. Batic, N. B. Debru, M. Nowakowski
In this paper, we present new axisymmetric and reflection symmetric vacuum solutions to the Einstein field equations. They are obtained using the Hankel integral transform method a…
In-Stabilities of massive white dwarfs in modified gravity
Ronaldo V. Lobato, Geanderson A. Carvalho, Neelima G. Kelkar +1
Super-Chandrasekhar white dwarfs are a timely topic in the last years in the scientific community due to its connection to supernovae type Ia (SN Ia). Some early studies tackled th…
Possible Connection between Dark Matter and Supermassive Black Holes
Davide Batic, Joud Mojahed Faraji, Marek Nowakowski
Dark Matter (DM) is usually studied in connection with rotational curves in the outskirts of the galaxies. However, the role of DM might be different in the galactic bulges and cen…
On the eigenvalues of the fermionic angular eigenfunctions in the Kerr metric
Davide Batic, Suzan Hamad Abdul Karim, Marek Nowakowski
In view of a result recently published in the context of deformation theory of linear Hamiltonian systems, we reconsider the eigenvalue problem associated to the angular equation a…
Orbital decay of double white dwarfs: beyond gravitational wave radiation effects
G. A. Carvalho, R. C. dos Anjos, J. G. Coelho +6
The traditional description of the orbital evolution of compact-object binaries, like double white dwarfs (DWDs), assumes that the system is driven only by gravitational wave (GW)…