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Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons

Graham Shore

Journal of High Energy Physics, Volume: 2018, Issue: 12, Start page: 133

Swansea University Author: Graham Shore

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DOI (Published version): 10.1007/JHEP12(2018)133

Abstract

The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons. Memory, which may be of position or velocity-encoded type, characterises the residual separation of neighbouring ‘detector’ geode...

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Published in: Journal of High Energy Physics
ISSN: 1029-8479
Published: Berlin-Heidelberg Springer 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa47959
first_indexed 2018-12-13T20:02:06Z
last_indexed 2020-06-16T19:00:17Z
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spelling 2020-06-16T15:57:40.0305463 v2 47959 2018-12-13 Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons 28a24f55687c82d6f3ee378ead3cf234 Graham Shore Graham Shore true false 2018-12-13 The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons. Memory, which may be of position or velocity-encoded type, characterises the residual separation of neighbouring ‘detector’ geodesics following the passage of a gravitational wave burst, and retains information on the nature of the wave source. Here, it is shown how memory is encoded in the Penrose limit of the original gravitational wave spacetime and a new ‘timelike Penrose limit’ is introduced to complement the original plane wave limit appropriate to null congruences. A detailed analysis of memory is presented for timelike and null geodesic congruences in impulsive and extended gravitational shockwaves of Aichelburg-Sexl type, and for gyratons. Potential applications to gravitational wave astronomy and to quantum gravity, especially infra-red structure and ultra-high energy scattering, are briefly mentioned. Journal Article Journal of High Energy Physics 2018 12 133 Springer Berlin-Heidelberg 1029-8479 General relativity, quantum gravity 21 12 2018 2018-12-21 10.1007/JHEP12(2018)133 https://arxiv.org/pdf/1811.08827.pdf COLLEGE NANME COLLEGE CODE Swansea University 2020-06-16T15:57:40.0305463 2018-12-13T15:48:34.7833727 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Graham Shore 1 0047959-03012019125022.pdf 47959.pdf 2019-01-03T12:50:22.7930000 Output 1519049 application/pdf Version of Record true 2019-01-01T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
spellingShingle Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
Graham Shore
title_short Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
title_full Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
title_fullStr Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
title_full_unstemmed Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
title_sort Memory, Penrose limits and the geometry of gravitational shockwaves and gyratons
author_id_str_mv 28a24f55687c82d6f3ee378ead3cf234
author_id_fullname_str_mv 28a24f55687c82d6f3ee378ead3cf234_***_Graham Shore
author Graham Shore
author2 Graham Shore
format Journal article
container_title Journal of High Energy Physics
container_volume 2018
container_issue 12
container_start_page 133
publishDate 2018
institution Swansea University
issn 1029-8479
doi_str_mv 10.1007/JHEP12(2018)133
publisher Springer
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url https://arxiv.org/pdf/1811.08827.pdf
document_store_str 1
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description The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons. Memory, which may be of position or velocity-encoded type, characterises the residual separation of neighbouring ‘detector’ geodesics following the passage of a gravitational wave burst, and retains information on the nature of the wave source. Here, it is shown how memory is encoded in the Penrose limit of the original gravitational wave spacetime and a new ‘timelike Penrose limit’ is introduced to complement the original plane wave limit appropriate to null congruences. A detailed analysis of memory is presented for timelike and null geodesic congruences in impulsive and extended gravitational shockwaves of Aichelburg-Sexl type, and for gyratons. Potential applications to gravitational wave astronomy and to quantum gravity, especially infra-red structure and ultra-high energy scattering, are briefly mentioned.
published_date 2018-12-21T01:58:46Z
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