Flat rotation curves in Chern-Simons modified gravity
Flat rotation curves in Chern-Simons modified gravity
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DOI：
10.1103/physrevd.78.024037
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发表时间：
2008-07
影响因子：
5
通讯作者：
K. Konno;T. Matsuyama;Y. Asano;S. Tanda
中科院分区：
文献类型：
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作者：
K. Konno;T. Matsuyama;Y. Asano;S. Tanda
介绍。在引力理论中有三个基本的未解决的问题：引力的量子化，暗能量和暗物质。弦理论[1]是一个很有希望的候选者，可以作为引力的相容量子理论。然而，量子化重力的许多尝试都没有成功。在天文学/天体物理学中，许多观测表明暗能量[2，3]和暗物质[3，4]的存在。虽然已经进行了许多天体物理学的调查[5]，但还没有揭示什么是暗物质。例如，星系平坦的旋转曲线[6]被认为是暗物质存在的有力证据。绕星系中心运行的星星的速度v在离中心一定距离r处变成常数。而牛顿引力产生了一个关系v 1/r。目前，我们通常将这种差异归因于暗物质。然而，基于没有暗物质的理论，仍然有可能解释这种现象。在本文中，我们提出了一个模型来解决这个差异的框架中的Chern-Simons（CS）引力。
Introduction.—There are three fundamental unsolved issues in the theory of gravity: quantization of gravity, dark energy, and dark matter. The string theory [1] is a promising candidate for a consistent quantum theory of gravity. Many attempts in quantizing gravity, however, have not been successful. In astronomy/astrophysics, a number of observations suggest the existence of dark energy [2, 3] and dark matter [3, 4]. Although many surveys of astrophysical objects have been conducted [5], it has not yet been revealed what is dark matter. For instance, the flat rotation curves of galaxies [6] have been considered to be a robust evidence of dark matter. The velocity v of a star orbiting around the center of a galaxy becomes a constant at a certain distance r far from the center. While the Newtonian gravity yields a relation v ∝ 1/ √ r. At present, we usually attribute the discrepancy to dark matter. However it may be still possible to explain the phenomenon based on a theory without dark matter. In this paper, we propose a model to solve this discrepancy in the framework of the Chern-Simons (CS) gravity.