Emil Akhmedov, Daniil Kalinov and Fedor Popov on distinguishing black holes

Scientists from Moscow Institute of Physics and Technology, the Institute for Theoretical and Experimental Physics, and the National Research University Higher School of Economics have devised a method of distinguishing black holes from compact massive objects that are externally indistinguishable from one another. The method involves studying the energy spectrum of particles moving in the vicinity, which can be continuous or discrete. The findings have been published in Physical Review D.

Read more at: http://phys.org/news/2016-07-particle-energy-spectra-distinguish-black.html#jCp