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Astrophysical black holes in screened modified gravity.

机译:筛选出的重力修正过的天体黑洞。

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摘要

Chameleon, environmentally dependent dilaton, and symmetron gravity are three models of modified gravity in which the effects of the additional scalar degree of freedom are screened in dense environments. They have been extensively studied in laboratory, cosmological, and astrophysical contexts. In this paper, we present a preliminary investigation into whether additional constraints can be provided by studying these scalar fields around black holes. By looking at the properties of a static, spherically symmetric black hole, we find that the presence of a non-uniform matter distribution induces a non-constant scalar profile in chameleon and dilaton, but not necessarily symmetron gravity. An order of magnitude estimate shows that the effects of these profiles on in-falling test particles will be sub-leading compared to gravitational waves and hence observationally challenging to detect.
机译:变色龙,环境相关的膨胀子和共模引力是修正引力的三个模型,其中在密集环境中筛选了附加标量自由度的影响。他们已经在实验室,宇宙学和天体物理学方面进行了广泛的研究。在本文中,我们对通过研究黑洞周围的这些标量场是否可以提供附加约束进行了初步研究。通过查看静态的球对称黑洞的性质,我们发现不均匀物质分布的存在在变色龙和dilaton中引起了非恒定的标量轮廓,但不一定是共重子重力。一个数量级的估计表明,与重力波相比,这些剖面对落入的测试粒子的影响将是次领先的,因此在观察上难以检测。

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