小尺度结构和重子Jeans质量的变色龙效应
Chameleon Effects on Small Scale Structure and the Baryonic Jeans Mass
摘要：
在牛顿宇宙学或广义相对论的框架中，导出一个质量标度是很简单的，在这个质量标度之下，坍缩的结构相对来说没有重子。我们研究如何列入一个变色龙标量场影响重子的金斯质量，铭记两个典型的情况下，引力强度之间的耦合的标量场和物质，以及强耦合制度，其中耦合是非常大的。我们发现，在变色龙理论中重子效应比在普通的广义相对论中持续到更小的尺度，特别是在强耦合的情况下。几个潜在的可观察到的后果，这是确定的。
英文摘要：
In the framework of Newtonian cosmology or general relativity it is simple to derive a mass scale below which collapsed structures are relatively devoid of baryons. We examine how the inclusion of a chameleon scalar field affects this baryonic Jeans mass, bearing in mind both the canonical case of a gravitational-strength coupling between the scalar field and matter, as well as the strong coupling regime wherein the coupling is very large. We find that baryon effects persist down to smaller scales in a chameleon theory than they do in ordinary general relativity, especially in the case of strong coupling. Several potentially observable consequences of this are identified.
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