Malaise and remedy of binary boson-star initial data
Publication Date
2022Journal Title
Classical and Quantum Gravity
ISSN
0264-9381
Publisher
IOP Publishing
Volume
39
Issue
7
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Helfer, T., Sperhake, U., Croft, R., Radia, M., Ge, B., & Lim, E. A. (2022). Malaise and remedy of binary boson-star initial data. Classical and Quantum Gravity, 39 (7) https://doi.org/10.1088/1361-6382/ac53b7
Abstract
Through numerical simulations of boson-star head-on collisions, we explore
the quality of binary initial data obtained from the superposition of
single-star spacetimes. Our results demonstrate that evolutions starting from a
plain superposition of individual boosted boson-star spacetimes are vulnerable
to significant unphysical artefacts. These difficulties can be overcome with a
simple modification of the initial data suggested in [PRD 99 (2018) 044046] for
collisions of oscillatons. While we specifically consider massive complex
scalar field boson star models up to a 6th-order-polynomial potential, we argue
that this vulnerability is universal and present in other kinds of exotic
compact systems and hence needs to be addressed.
Keywords
Paper, Focus Issue on Bosonic Stars, gravitational waves, compact objects, boson stars, numerical relativity
Sponsorship
STFC (1936371)
Science and Technology Facilities Council (1936371)
European Research Council (646597)
STFC (ST/V005669/1)
Science and Technology Facilities Council (ST/P000673/1)
Science and Technology Facilities Council (ST/R002452/1)
Science and Technology Facilities Council (ST/R00689X/1)
Science and Technology Facilities Council (ST/M007065/1)
STFC (ST/M007073/1)
Identifiers
cqgac53b7, ac53b7, cqg-108661.r1
External DOI: https://doi.org/10.1088/1361-6382/ac53b7
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335469
Rights
Licence:
https://creativecommons.org/licenses/by/4.0/
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