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arXiv 1105.0147gr-qcastro-ph.GAhep-th
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作为星系中暗物质模型的R^{2}引力中的高能标量子

High-energy scalarons in R^{2} gravity as a model for Dark Matter in galaxies

Christian Corda, Herman J. Mosquera Cuesta, Roberto Lorduy Gòmez

摘要:

我们表明,在R^{2}引力的框架下,在线性化的方法中,有可能获得球对称定态,可以用作星系的模型。该模型也有助于更好地理解Einstein-Vlasov系统的理论基础。特别地,我们讨论了线性化的R^{2}引力中时空曲率的Klein-Gordon方程的解。这样的解描述了高能标量子,在银河系动力学的背景下,这个场可以被解释为不发光的银河系分量。也就是说,这些粒子可以像爱因斯坦-弗拉索夫系统中的波包一样被计算出来。与本文所分析的问题相关,我们在此框架内对引力透镜现象进行了分析。虽然本文的主要目标是给一个潜在的解决方案,星系内的暗物质问题,我们增加了一个章节,我们表明,一个重要的属性的子弹星系团可以在原则上解释的情况下介绍了这项工作。最后,我们讨论了一般的前景,以引起大多数星系的暗物质组成部分的扩展引力。

英文摘要:

We show that in the framework of R^{2} gravity and in the linearized approach it is possible to obtain spherically symmetric stationary states that can be used as a model for galaxies. The model can also help to have a better understanding on the theoretical basis of Einstein-Vlasov systems. Specifically, we discuss, in the linearized R^{2} gravity, the solutions of a Klein-Gordon equation for the spacetime curvature. Such solutions describe high energy scalarons, a field that in the context of galactic dynamics can be interpreted like the no-light-emitting galactic component. That is, these particles can be figured out like wave-packets showing stationary solutions in the Einstein-Vlasov system. As pertinent to the issue under analysis in this paper, we present an analysis on the gravitational lensing phenomena within this framework. Although the main goal of this paper is to give a potential solution to the Dark Matter Problem within galaxies, we add a Section where we show that an important property of the Bullet Cluster can in principle be explained in the scenario introduced in this work. To the end, we discuss the generic prospective to give rise to the Dark Matter component of most galaxies within extended gravity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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