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gr-qc2026
On the Stability of the Euler-Poisson Dark-Fluid Model
Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi
We present a stability analysis of a dark-fluid model described as a non-relativistic, rotating, non-viscous, self-gravitating fluid. We assume spherical symmetry and model the mat…
gr-qc2025
Asymptotic evolution of bulk-viscous, spherically symmetric spacetimes
Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi
The scale-free nature of gravitational interaction in both Newtonian gravity and the general theory of relativity gives rise to the concept of self-similarity, where solutions are…
gr-qc2025
Can Rotation Solve the Hubble Puzzle?
Balázs Endre Szigeti, István Szapudi, Imre Ferenc Barna +1
The discrepancy between low and high redshift Hubble constant measurements is the highest significance tension within the concordance CDM paradigm. If not due to unknown…