Unequal-mass boson-star binaries: initial data and merger dynamics

We present a generalisation of the curative initial data construction derived for equal-mass compact binaries in Helfer et al (2019 Phys. Rev. D 99 044046; 2022 Class. Quantum Grav. 39 074001) to arbitrary mass ratios. We demonstrate how these improved initial data avoid substantial spurious artifac...

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Bibliographic Details
Published in:Classical and quantum gravity 2023-04, Vol.40 (8), p.85009
Main Authors: Evstafyeva, Tamara, Sperhake, Ulrich, Helfer, Thomas, Croft, Robin, Radia, Miren, Ge, Bo-Xuan, Lim, Eugene A
Format: Article
Language:English
Subjects:
boson stars
gravitational waves
numerical relativity
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Summary:We present a generalisation of the curative initial data construction derived for equal-mass compact binaries in Helfer et al (2019 Phys. Rev. D 99 044046; 2022 Class. Quantum Grav. 39 074001) to arbitrary mass ratios. We demonstrate how these improved initial data avoid substantial spurious artifacts in the collision dynamics of unequal-mass boson-star binaries in the same way as has previously been achieved with the simpler method restricted to the equal-mass case. We employ the improved initial data to explore in detail the impact of phase offsets in the coalescence of equal- and unequal-mass boson star binaries.
ISSN:0264-9381
1361-6382
DOI:10.1088/1361-6382/acc2a8