Avoiding the Trans-Planckian Problem in Black Hole Physics

Carlos Barceló*, Luis C. Barbado, Luis J. Garay, Gil Jannes

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


    We describe how the avoidance of the trans-Planckian problem of Hawking radiation can be used 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. Some specific findings along the way are (a) that a theory with high-energy superluminal signaling and a long-lived trapping horizon would be extremely unstable in astrophysical terms and (b) that stellar pulsations of objects hovering right outside, but extremely close to their gravitational radius, can result in a mechanism for Hawking emission.

    Original languageEnglish
    Title of host publicationProgress in Mathematical Relativity, Gravitation and Cosmology
    Subtitle of host publicationProceedings of the Spanish Relativity Meeting ERE2012, University of Minho, Guimarães, Portugal, September 3-7, 2012
    Number of pages5
    ISBN (Electronic)978-3-642-40157-2
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventSpanish Relativity Meeting - Guimaraes, Portugal
    Duration: 3 Sep 20127 Sep 2012


    ConferenceSpanish Relativity Meeting
    Abbreviated titleERE

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