Malaise and remedy of binary boson-star initial data
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Publication Date
2022-02-10Journal Title
Classical and Quantum Gravity
ISSN
0264-9381
Publisher
IOP Publishing
Type
Article
This Version
AM
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 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
gr-qc, gr-qc
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)
Embargo Lift Date
2023-02-10
Identifiers
External DOI: https://doi.org/10.1088/1361-6382/ac53b7
This record's URL: https://www.repository.cam.ac.uk/handle/1810/333664
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