Implications of cosmic strings with time-varying tension on CMB and large scale structure

Details Implications of cosmic strings with time-varying tension on CMB and large scale structure Implications of cosmic strings with time-varying tension on CMB and large scale structure

2006-06-28

arxiv.org/abs/hep-ph/0606287v1

Phys.Rev.D74:063526,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 7 figures

Scientific paper

10.1103/PhysRevD.74.063526

We investigate cosmological evolution and implications of cosmic strings with time-dependent tension. We derive basic equations of time development of the correlation length and the velocity of such strings, based on the one scale model. Then, we find that, in the case where the tension depends on some power of the cosmic time, cosmic strings with time-dependent tension goes into the scaling solution if the power is lower than a critical value. We also discuss cosmic microwave background anisotropy and matter power spectra produced by these strings. The constraints on their tensions from the Wilkinson microwave anisotropy probe (WMAP) three year data and Sloan digital sky survey (SDSS) data are also given.

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