论文标题
测试爱因斯坦 - 加斯 - 骨网的可行扩展
Testing viable extensions of Einstein-Gauss-Bonnet gravity
论文作者
论文摘要
在存在非最低耦合标量场的情况下，考虑了高斯 - 骨网框架内的一些模型。通过对标量场耦合施加特定的约束，考虑到所谓的Einstein-Gauss-Bonnet重力的扩展，该重力可以保持重力波的正确传播速度。研究了这种可行模型的宇宙演化，并将其与观察数据（BAO，CMB，SNE IA，..）进行了比较，在那里我们获得了这些理论的相应界限，并表明此类理论符合数据符合数据，并提供了与宇宙标准模型相比的宇宙学演化。一些统计参数表明，拟合的好处比$λ$ CDM模型的拟合略好。
Some models within the framework of Gauss-Bonnet gravities are considered in the presence of a non-minimally coupled scalar field. By imposing a particular constraint on the scalar field coupling, an extension of the called Einstein-Gauss-Bonnet gravity that keeps the correct speed of propagation for gravitational waves, is considered. The cosmological evolution for this viable class of models is studied and compared with observational data (BAO, CMB, Sne Ia,..), where we obtain the corresponding bounds for these theories and show that such theories fit well the data and provide a well-behaved cosmological evolution in comparison to the standard model of cosmology. Some statistical parameters show that the goodness of the fits are slightly better than those for $Λ$CDM model.
