Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-28
Phys.Rev.D78:067302,2008
Astronomy and Astrophysics
Astrophysics
Submitted to Phys. Rev. D (Brief Reports). v2: Reference added and some typos corrected, matches published version
Scientific paper
10.1103/PhysRevD.78.067302
We discuss the possible dynamical role of extended cosmic defects on galactic scales, specifically focusing on the possibility that they may provide the dark matter suggested by the classical problem of galactic rotation curves. We emphasize that the more standard defects (such as Goto-Nambu strings) are unsuitable for this task, but show that more general models (such as transonic wiggly strings) could in principle have a better chance. In any case, we show that observational data severely restricts any such scenarios.
Avelino Pedro P.
de Carvalho P. M. J.
Guerreiro N.
Martins Carlos J. A. P.
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