Open AccessGravitational waves in a string‐like fluid cosmology
Author(s) -
Fabris Júlio César,
Gonçalves Sérgio Vitorino de Borba
Publication year - 1999
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1999.02554.x
Subject(s) - physics , gravitational wave , cosmology , classical mechanics , cosmic string , gravitation , universe , theoretical physics , string (physics) , astrophysics
The coupling of a string‐like 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 string‐like fluid indicates the existence of instabilities in the small‐wavelength limit when a hydrodynamic approach is employed. 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.