论文标题
三角洲重力的宇宙学波动
Cosmological Fluctuations in Delta Gravity
论文作者
论文摘要
大约70％的宇宙是暗能量，但物理界仍然不知道它是什么。三角洲重力（DG）是一种可以解决这个宇宙学问题的引力理论。以前，我们研究了宇宙的加速扩展，DG能够成功解释SNE-IA数据。在这项工作中，我们探索了宇宙学的波动，这些波动通过流体动力近似引起了CMB。我们计算了指标的量规变换和完美的流体，以呈现宇宙波动演变的方程式，从而提供了以半分析方式求解标量TT功率谱的必要方程式。这些方程将有助于将DG理论与天文观测进行比较，从而能够限制DG宇宙学，将来测试与CMB Planck数据的兼容性，这些数据目前与SNE-IA有争议。
About 70\% of the Universe is Dark Energy, but the physics community still does not know what it is. Delta Gravity (DG) is an alternative theory of gravitation that could solve this cosmological problem. Previously, we studied the Universe's accelerated expansion, where DG was able to explain the SNe-Ia data successfully. In this work, we explore the cosmological fluctuations that give rise to the CMB through a hydrodynamic approximation. We calculate the gauge transformations for the metric and the perfect fluid to present the equations of the evolution of cosmological fluctuations, providing the necessary equations to solve in a semi-analytical way the scalar TT Power Spectrum. These equations will be useful for comparing the DG theory with astronomical observations and thus being able to constraint the DG cosmology, testing, in the future, the compatibility with the CMB Planck data, which are currently in controversy with SNe-Ia.
