I am confused with the fact that nearly all recent work about black holes in canonical quantum gravity is based on the definition of http://relativity.livingreviews.org/open?pubNo=lrr-2004-10&page=articlesu1.html [Broken]. These seam to be a generalization of event horizons, and, it seams that their definition does not need of asymptotic flatness. But, if asymptotic flatness is not needed, then there is not always a notion of mass and even no Hawking temperature and no thermodynamics. So can someone explain a bit the definition of isolated horizons and why it is so useful?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Isolated horizons

**Physics Forums | Science Articles, Homework Help, Discussion**