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
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.
Topics & Concepts
PhysicsBosonSpurious relationshipCoalescence (physics)CollisionStar (game theory)AstrophysicsTheoretical physicsAstronomyParticle physicsStatisticsComputer scienceComputer securityMathematicsPulsars and Gravitational Waves ResearchCold Atom Physics and Bose-Einstein CondensatesGamma-ray bursts and supernovae