标题： 弦状流体宇宙中的引力波 显示英文标题

标题： Gravitational waves in a stringlike fluid cosmology

摘要： 弦状流体与普通物质和引力的耦合可能导致一个封闭的宇宙，其动态类似于开放的宇宙。 这可以为年龄和视界问题提供一种替代解决方案。 对弦状流体密度扰动的研究表明，当采用流体力学方法时，在小波长极限下存在不稳定性。 在这里，我们将这项研究扩展到引力波，其中流体力学方法的作用较小，我们认为这种流体的存在痕迹必须出现在宇宙背景辐射的各向异性中。 显示英文摘要

摘要： The coupling of a stringlike fluid with ordinary matter and gravity may lead to a closed Universe with the dynamic of an open one. This can provide an alternative solution for the age and horizon problems. A study of density perturbations of the stringlike fluid indicates the existence of instabilities in the small wavelength limit when it is employed a hydrodynamic approach. Here, we extend this study to gravitational waves, where the hydrodynamical approach plays a less important role, and we argue that traces of the existence of this fluid must be present in the anisotropies of the cosmic background radiation.