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Barbado, L. C. Barceló, C. Garay Elizondo, Luis Javier Jannes, Gil 2023-06-20T03:50:00Z 2023-06-20T03:50:00Z 2011 Barbado, L. C., C. Barceló, L. J. Garay, y G. Jannes. «The Trans-Planckian Problem as a Guiding Principle». Journal of High Energy Physics 2011, n.o 11 (23 de noviembre de 2011): 112. https://doi.org/10.1007/JHEP11(2011)112. 1126-6708 10.1007/JHEP11(2011)112 https://hdl.handle.net/20.500.14352/44523 http://dx.doi.org/10.1007/JHEP11(2011)112 http://link.springer.com/ We use the avoidance of the trans-Planckian problem of Hawking radiation as a guiding principle in searching for a compelling scenario for the evaporation of black holes or black-hole-like objects. We argue that there exist only three possible scenarios, depending on whether the classical notion of long-lived horizon is preserved by high-energy physics and on whether the dark and compact astrophysical objects that we observe have long-lived horizons in the first place. Along the way, we find that i) a theory with high-energy superluminal signalling and a long-lived trapping horizon would be extremely unstable in astrophysical terms and that i i) stellar pulsations of objects hovering right outside but extremely close to their gravitational radius can result in a mechanism for Hawking-like emission. spa open access The trans-Planckian problem as a guiding principle journal article