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arXiv 1603.04876gr-qcastro-ph.HEhep-th
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Horndeski引力中的中子星

Neutron stars in Horndeski gravity

Andrea Maselli, Hector O. Silva, Masato Minamitsuji, Emanuele Berti

摘要:

Horndeski的引力理论是最一般的标量-张量理论,只有一个标量,其运动方程最多包含二阶导数。Horndeski理论的一个子部分被称为“Fab Four”引力,允许量子真空能量的动态自调谐,因此它作为$Λ$ CDM模型的可能替代方案在宇宙学中受到特别关注。在这里,我们研究紧凑型恒星在Fab Four引力,其中包括作为特殊情况的广义相对论(“乔治”),爱因斯坦-爱因斯坦-高斯-邦纳引力(“林戈”),理论与爱因斯坦张量的非最小耦合(“约翰”)和理论涉及双对偶的黎曼张量(“保罗”)。我们推广和扩展以前的结果在约翰类的理论,并没有能够找到现实的紧凑型恒星的理论涉及保罗类。

英文摘要:

Horndeski's theory of gravity is the most general scalar-tensor theory with a single scalar whose equations of motion contain at most second-order derivatives. A subsector of Horndeski's theory known as "Fab Four" gravity allows for dynamical self-tuning of the quantum vacuum energy, and therefore it has received particular attention in cosmology as a possible alternative to the $Λ$CDM model. Here we study compact stars in Fab Four gravity, which includes as special cases general relativity ("George"), Einstein-dilaton-Gauss-Bonnet gravity ("Ringo"), theories with a nonminimal coupling with the Einstein tensor ("John") and theories involving the double-dual of the Riemann tensor ("Paul"). We generalize and extend previous results in theories of the John class and were not able to find realistic compact stars in theories involving the Paul class.

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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