Malaise and remedy of binary boson-star initial data
Malaise and remedy of binary boson-star initial data
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DOI：
10.1088/1361-6382/ac53b7
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发表时间：
2021-08
影响因子：
3.5
通讯作者：
T. Helfer;U. Sperhake;R. Croft;Miren Radia;Bo-Xuan Ge;Eugene A. Lim
中科院分区：
文献类型：
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作者：
T. Helfer;U. Sperhake;R. Croft;Miren Radia;Bo-Xuan Ge;Eugene A. Lim
通过玻色子与恒星正面碰撞的数值模拟，我们探索了从单星时空叠加中获得的二元初始数据的质量。我们的研究结果表明，从一个简单的叠加个别提升玻色子星时空开始的演变是容易受到显着的非物理文物。对于等质量双星，这些困难可以通过简单修改Helfer等人（2019 Phys. Rev. D 99 044046）中提出的振荡碰撞的初始数据来克服。虽然我们特别考虑大规模复杂标量场玻色子星星模型非常高和低的紧凑性，我们推测，这种脆弱性也存在于其他种类的异国情调的紧凑系统，因此需要加以解决。
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. For equal-mass binaries, these difficulties can be overcome with a simple modification of the initial data suggested in Helfer et al (2019 Phys. Rev. D 99 044046) for collisions of oscillations. While we specifically consider massive complex scalar field boson star models of very high and low compactness, we conjecture that this vulnerability be also present in other kinds of exotic compact systems and hence needs to be addressed.