Malaise and remedy of binary boson-star initial data
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Helfer, Thomas
Sperhake, Ulrich https://orcid.org/0000-0002-3134-7088
Croft, Robin
Radia, Miren https://orcid.org/0000-0001-8861-2025
Ge, Bo-Xuan
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.
Description
Keywords
gr-qc, gr-qc
Journal Title
Classical and Quantum Gravity
Conference Name
Journal ISSN
0264-9381
1361-6382
1361-6382
Volume Title
39
Publisher
IOP Publishing
Publisher DOI
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)
STFC (ST/T00049X/1)
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)
STFC (ST/T00049X/1)