### Abstract

Language | English |
---|---|

Article number | 064054 |

Number of pages | 11 |

Journal | Physical Review D |

Volume | 100 |

Issue number | 6 |

DOIs | |

Publication status | Published - 26 Sep 2019 |

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*Physical Review D*,

*100*(6), [064054]. https://doi.org/10.1103/PhysRevD.100.064054

}

*Physical Review D*, vol. 100, no. 6, 064054. https://doi.org/10.1103/PhysRevD.100.064054

**Black hole evaporation and semiclassical thin shell collapse.** / Baccetti, Valentina; Murk, Sebastian; Terno, Daniel R.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Black hole evaporation and semiclassical thin shell collapse

AU - Baccetti, Valentina

AU - Murk, Sebastian

AU - Terno, Daniel R.

PY - 2019/9/26

Y1 - 2019/9/26

N2 - In case of spherical symmetry, the assumptions of finite-time formation of a trapped region and regularity of its boundary—the apparent horizon—are sufficient to identify the form of the metric and energy-momentum tensor in its vicinity. By comparison with the known results for quasistatic evaporation of black holes, we complete the identification of their parameters. Consistency of the Einstein equations allows only two possible types of higher-order terms in the energy-momentum tensor. By using its local conservation, we provide a method of calculation of the higher-order terms, explicitly determining the leading-order regular corrections. Contraction of a spherically symmetric thin dust shell is the simplest model of gravitational collapse. Nevertheless, the inclusion of a collapse-triggered radiation in different extensions of this model leads to apparent contradictions. Using our results, we resolve these contradictions and show how gravitational collapse may be completed in finite time according to a distant observer.

AB - In case of spherical symmetry, the assumptions of finite-time formation of a trapped region and regularity of its boundary—the apparent horizon—are sufficient to identify the form of the metric and energy-momentum tensor in its vicinity. By comparison with the known results for quasistatic evaporation of black holes, we complete the identification of their parameters. Consistency of the Einstein equations allows only two possible types of higher-order terms in the energy-momentum tensor. By using its local conservation, we provide a method of calculation of the higher-order terms, explicitly determining the leading-order regular corrections. Contraction of a spherically symmetric thin dust shell is the simplest model of gravitational collapse. Nevertheless, the inclusion of a collapse-triggered radiation in different extensions of this model leads to apparent contradictions. Using our results, we resolve these contradictions and show how gravitational collapse may be completed in finite time according to a distant observer.

U2 - 10.1103/PhysRevD.100.064054

DO - 10.1103/PhysRevD.100.064054

M3 - Article

VL - 100

JO - Physical Review D

T2 - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 6

M1 - 064054

ER -