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

Journal Article · Fri Sep 15 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.063526· OSTI ID:20871200

Ichikawa, Kazuhide ^[1]; Takahashi, Tomo ^[2]; Yamaguchi, Masahide ^[3]

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1. Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan)
2. Department of physics, Saga University, Saga 840-8502 (Japan)
3. Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 229-8558 (Japan)

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) 3 yr data and Sloan digital sky survey (SDSS) data are also given.

• OSTI ID: 20871200
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevD.74.063526; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
CORRELATIONS
COSMOLOGY
ENERGY SPECTRA
FIELD EQUATIONS
LENGTH
MATHEMATICAL SOLUTIONS
PROBES
RELICT RADIATION
SCALE MODELS
TIME DEPENDENCE