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Title: Subleading BMS charges and fake news near null infinity

Abstract

In this paper we establish a relation between the non-linearly conserved New-man-Penrose charges and certain subleading terms in a large-r expansion of the BMS charges in an asymptotically-flat spacetime. We define the subleading BMS charges by considering a 1/r-expansion of the Barnich-Brandt prescription for defining asymptotic charges in an asymptotically-flat spacetime. At the leading order, i.e. 1/r0, one obtains the standard BMS charges, which would be integrable and conserved in the absence of a flux term at null infinity, corresponding to gravitational radiation, or Bondi news. At subleading orders, analogous terms in general provide obstructions to the integrability of the corresponding charges. Since the subleading terms are defined close to null infinity, but vanish actually at infinity, the analogous obstructions are not associated with genuine Bondi news. One may instead describe them as corresponding to “fake news”. At order r-3, we find that a set of integrable charges can be defined and that these are related to the ten non-linearly conserved Newman-Penrose charges.

Authors:
 [1]; ORCiD logo [2];  [3]
  1. Max-Planck-Institut für Gravitationsphysik, Potsdam (Germany)
  2. Eidgenössische Technische Hochschule Zürich (Switzerland)
  3. Texas A & M Univ., College Station, TX (United States); Cambridge Univ. (United Kingdom)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1611520
Grant/Contract Number:  
SC0010813
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; Classical Theories of Gravity; Space-Time Symmetries

Citation Formats

Godazgar, Hadi, Godazgar, Mahdi, and Pope, C. N. Subleading BMS charges and fake news near null infinity. United States: N. p., 2019. Web. doi:10.1007/jhep01(2019)143.
Godazgar, Hadi, Godazgar, Mahdi, & Pope, C. N. Subleading BMS charges and fake news near null infinity. United States. https://doi.org/10.1007/jhep01(2019)143
Godazgar, Hadi, Godazgar, Mahdi, and Pope, C. N. Wed . "Subleading BMS charges and fake news near null infinity". United States. https://doi.org/10.1007/jhep01(2019)143. https://www.osti.gov/servlets/purl/1611520.
@article{osti_1611520,
title = {Subleading BMS charges and fake news near null infinity},
author = {Godazgar, Hadi and Godazgar, Mahdi and Pope, C. N.},
abstractNote = {In this paper we establish a relation between the non-linearly conserved New-man-Penrose charges and certain subleading terms in a large-r expansion of the BMS charges in an asymptotically-flat spacetime. We define the subleading BMS charges by considering a 1/r-expansion of the Barnich-Brandt prescription for defining asymptotic charges in an asymptotically-flat spacetime. At the leading order, i.e. 1/r0, one obtains the standard BMS charges, which would be integrable and conserved in the absence of a flux term at null infinity, corresponding to gravitational radiation, or Bondi news. At subleading orders, analogous terms in general provide obstructions to the integrability of the corresponding charges. Since the subleading terms are defined close to null infinity, but vanish actually at infinity, the analogous obstructions are not associated with genuine Bondi news. One may instead describe them as corresponding to “fake news”. At order r-3, we find that a set of integrable charges can be defined and that these are related to the ten non-linearly conserved Newman-Penrose charges.},
doi = {10.1007/jhep01(2019)143},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2019,
place = {United States},
year = {Wed Jan 16 00:00:00 EST 2019},
month = {Wed Jan 16 00:00:00 EST 2019}
}

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