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arXiv 1503.02480gr-qc
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关于扭转耦合场带电玻色子星的注记

Note on the charged boson stars with torsion-coupled field

Dubravko Horvat, Sasa Ilijic, Anamarija Kirin, Zoran Narancic

备注：
11 pages, 2 figures, v2: appendix added, matches published version
发表信息：
Phys. Rev. D 92, 024045 (2015)
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摘要：

在扩展的遥平行引力理论框架下，通过引入标量场与挠率标量场的非最小耦合，构造了一类新的玻色子星。这些静态的、球形的、自引力结构的大质量复标量场的一个有趣的特征是，它们的中心区域具有向外增加的能量密度，被一个厚壳包围，在这个厚壳中发生了与通常的渐近史瓦西尾的连接。在这项工作中，我们扩展了原来的模型与$U(1)$规范场，我们发现的组合效应的电荷和耦合的字段扭转导致显着增加的最大质量和粒子数，可以支持对重力。我们还表明，一些带电的配置保存的属性，具有向外增加的能量密度的中心区域，无论事实上，充电的配置影响的各向异性的压力以相反的方式相对于场扭转耦合项。

英文摘要：

Within the framework of the extended teleparallel gravity, a new class of boson stars has recently been constructed by introducing the nonminimal coupling of the scalar field to the torsion scalar. An interesting feature of these static, spherical, self-gravitating configurations of the massive complex scalar field is their central region with outwardly increasing energy density, surrounded by a thick shell within which the joining with the usual asymptotically Schwarzschild tail takes place. In this work we extend the original model with the $U(1)$ gauge field and we find that the combined effect of the charge and coupling of the field to torsion leads to a significant increase of the maximal mass and the particle number that can be supported against gravity. We also show that some charged configurations preserve the property of having the outwardly increasing energy density over the central region, regardless of the fact that charging the configurations affects the anisotropy of the pressures in the opposite way relative to that of the field-to-torsion coupling terms.

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