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arXiv 1409.0853astro-ph.COgr-qc
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结构生长与修正重力下的CMB(MOG)

Structure Growth and the CMB in Modified Gravity (MOG)

J. W. Moffat

摘要:

暗物质的一个重要证据是需要解释从进入视界和辐射物质相等到恒星和星系形成的结构增长。这不能用没有暗物质的广义相对论来解释。到目前为止,暗物质粒子还没有在实验室测量或大型强子对撞机上检测到。我们证明了增强结构生长可以发生在一个修改的重力理论(MOG)。在解释星系和星系团动力学的理论中引入的矢量场和粒子在产生所需的结构生长中起着重要的作用。被称为phion的粒子(一种隐藏在光中的光子)是中性的,在MOG弗里德曼方程中是一个占主导地位的无压分量,在解耦之前。在早期宇宙中占主导地位的粒子的能量密度,产生了一个解释的密度扰动的增长。重子-光子压力波的角声功率谱与普朗克2013年的数据一致。当宇宙膨胀形成大尺度结构时,当宇宙中的粒子为超轻粒子时,MOG解释了重子密度占主导地位,星系的自转曲线和星系团的动力学。由该理论确定的物质功率谱与目前的星系红移测量结果一致。

英文摘要:

An important piece of evidence for dark matter is the need to explain the growth of structure from the time of horizon entry and radiation-matter equality to the formation of stars and galaxies. This cannot be explained by using general relativity without dark matter. So far, dark matter particles have not been detected in laboratory measurements or at the LHC. We demonstrate that enhanced structure growth can happen in a modified gravity theory (MOG). The vector field and particle introduced in the theory to explain galaxy and cluster dynamics plays an important role in generating the required structure growth. The particle called the phion (a light hidden photon) is neutral and is a dominant, pressureless component in the MOG Friedmann equations, before the time of decoupling. The dominant energy density of the phion particle in the early universe, generates an explanation for the growth of density perturbations. The angular acoustical power spectrum due to baryon-photon pressure waves is in agreement with the Planck 2013 data. As the universe expands and large scale structures are formed, the density of baryons dominates and the rotation curves of galaxies and the dynamics of clusters are explained in MOG, when the phion particle in the present universe is ultra-light. The matter power spectrum determined by the theory is in agreement with current galaxy redshift surveys.

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