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arXiv · 2212.08023

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

Tamara Evstafyeva·Ulrich Sperhake·Thomas Helfer·Robin Croft·Miren Radia·Bo-Xuan Ge·Eugene A. Lim
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Abstract

We present a generalization of the curative initial data construction derived for equal-mass compact binaries in Helfer {\it 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.

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Tamara Evstafyeva, Ulrich Sperhake, Thomas Helfer, Robin Croft, Miren Radia, Bo-Xuan Ge, Eugene A. Lim. 2022-12-15. Unequal-mass boson-star binaries: Initial data and merger dynamics. https://doi.org/10.1088/1361-6382/acc2a8

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