2020
DOI: 10.1088/1361-6382/ab8141
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Opening the Pandora’s box at the core of black holes

Abstract: Unless the reality of spacetime singularities is assumed, astrophysical black holes cannot be identical to their mathematical counterparts obtained as solutions of the Einstein field equations. Mechanisms for singularity regularization would spark deviations with respect to the predictions of general relativity, although these deviations are generally presumed to be negligible for all practical purposes. Nonetheless, the strength and nature of these deviations remain open questions, given the present uncertain… Show more

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Cited by 88 publications
(96 citation statements)
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“…Whether this is undesirable, or an opportunity for the observational detection of new physics, depends on philosophical considerations that are out of the scope of this present work. The most immediate consequence of our analysis, which is spelled out in more detail in the companion letter [17], is that one cannot just naively assert that singularity regularization will solve the outstanding issues of black hole physics without introducing additional aspects that, after a thorough analysis, may lead to radical surprises for our theoretical and observational understanding of black holes.…”
Section: Conclusion and Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Whether this is undesirable, or an opportunity for the observational detection of new physics, depends on philosophical considerations that are out of the scope of this present work. The most immediate consequence of our analysis, which is spelled out in more detail in the companion letter [17], is that one cannot just naively assert that singularity regularization will solve the outstanding issues of black hole physics without introducing additional aspects that, after a thorough analysis, may lead to radical surprises for our theoretical and observational understanding of black holes.…”
Section: Conclusion and Discussionmentioning
confidence: 99%
“…Our main thesis is formalized in section IV, where we categorize and discuss the possible geometries. While in this paper we focus on the geometrical analysis, we briefly discuss some of its physical implications in section V, which are investigated in more detail in a companion letter [17]. Finally, section VI contains a discussion of our main conclusions.…”
Section: Introductionmentioning
confidence: 99%
“…However, see Refs. [97,98] for some generic arguments in this direction. Moreover, from typical quantum gravity arguments, it has been proposed in Refs.…”
Section: Discussionmentioning
confidence: 99%
“…As paradigmatic cases, we will focus on Hayward and Dymnikova spacetimes, as well as the finite-spin counterpart of a Hayward black hole. Within General Relativity, the stability of the inner horizons of such black-hole spacetimes has been discussed in [72,73]; we will ignore such dynamical questions here and only treat these spacetimes as some of many that have to be included in the path integral.…”
Section: Regular Black-hole Spacetimesmentioning
confidence: 99%