2 papers
gr-qc2026
Exact Solutions with Asymptotically Flat Galactic Rotation Curves
Sandipan Sengupta
We present a new set of spacetime solutions for spiral galaxies corresponding to flat rotation curves at large distances. These correspond to anisotropic pressure, which could be s…
gr-qc2025
Canonical Gravity in Degenerate Limit
Sandipan Sengupta
We construct a limit of Hamiltonian gravity as the determinant of the spatial triad (and hence of the four-metric) goes to zero. Within the Barbero-Immirzi SU (2) formulation, we p…