Black hole or Fuzz ball or a Loop quantum star ? Assessing the fate of a massive collapsing star

Abstract

Using the effective equations in our Loop Quantum Cosmology (LQC) -- inspired models, we resolve the $(n+2)$ dimensional black hole singularity. This resolution in the four dimensional case is same as that given recently by Ashtekar, Olmedo, and Singh. We then study the fate of a massive collapsing star in $(n+2)$ dimensions, focussing on a singularity resolved black hole, a string theoretic fuzz ball, and a Loop quantum star -- which is a solution to the the effective modified equations for static spherically symmetric stars we obtained recently using LQC ideas. We find qualitatively that a massive collapsing star is likely to become a Loop quantum star : it is likely to have a macroscopic core region with Planckian densities and pressures which is surrounded by a low density corona region extending to the Schwarzschild radius.

Version 1. 17 pages. Version 2. 18 pages. A note and a few references added

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