Unequal-mass boson-star binaries: initial data and merger dynamics. (20th April 2023)

• Record Type: Journal Article
• Authors: Evstafyeva, Tamara; Sperhake, Ulrich; Helfer, Thomas; Croft, Robin; Radia, Miren; Ge, Bo-Xuan; Lim, Eugene A
• Is Part Of: Classical and quantum gravity. Volume 40:Number 8(2023)
• Publication Date: 2023-04-20
• Subjects: numerical relativity -- gravitational waves -- boson stars; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/1361-6382/acc2a8
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: 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.