Final State of Spherical Gravitational Collapse and Likely Source of Gamma Ray Bursts

Original · EN

Following our result that for the final state of continued spherical gravitational collapse, the gravitational mass of the fluid, Mf→ 0, we show that for a physical fluid the eventual value of 2GMf/Rf→ 1 rather than 2GMf/Rf <1, indicating approach to a zero-mass black hole. We also indicate that as the final state would be approached, the curvature components tend to blow up, and the proper radial distance l and the proper time τ→ ∞. This indicates that actually the singularity is never attained for the collapse of an isolated body. We also identify that, the final state may correspond to the local 3-speed v→ c, eventhough the circumference speed U→ 0. However, at a finite observation epoch, such Eternally Collapsing Objects (ECOs) may have a modest local speed of collapse v ≪ c, and the lab frame speed of collapse should practically be zero because of their extremely high surface gravitational red-shifts.