A polymer black hole with quintessence yields a shadow that can match Sgr A* for many combinations of free parameters while cooling and dimming the black hole.
Particle Creation by Loop Black Holes
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abstract
We study the black hole particle production in a regular spacetime metric obtained in a minisuperspace approach to loop quantum gravity. In different previous papers the static solution was obtained and shown to be singularity-free and self-dual. In this paper expanding a previous study of the black hole dynamics we repeat the Hawking analysis which leads to a thermal flux of particles at the future infinity. The evaporation time is infinite and the unitarity is recovered due to the regularity of the spacetime and to the characteristic behavior of the surface gravity.
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Polymer Black Hole Surrounded by Quintessence
A polymer black hole with quintessence yields a shadow that can match Sgr A* for many combinations of free parameters while cooling and dimming the black hole.