English

Black Holes without Event Horizons

General Relativity and Quantum Cosmology 2010-11-02 v1

Abstract

We discuss some of the drawbacks of using event horizons to define black holes. The reasons are both practical, physical and theoretical. We argue that locally defined trapping horizons can remedy many of these drawbacks. We examine of the question of whether black hole thermodynamics should be associated with event horizons or trapping horizons. To this end we discuss what role trapping horizons may play in black hole thermodynamics. In addition, we show how trapping horizons may give rise to Hawking radiation and discuss the issue of gravitational entropy.

Keywords

Cite

@article{arxiv.0802.3422,
  title  = {Black Holes without Event Horizons},
  author = {Alex B. Nielsen},
  journal= {arXiv preprint arXiv:0802.3422},
  year   = {2010}
}

Comments

Talk at APCTP Winter School, Daejeon, Korea, 2008. 7 pages, no figures

R2 v1 2026-06-21T10:15:17.557Z