• Corpus ID: 117607440

Cosmic Strings and Weak Gravitational Lensing

@article{Dyda2007CosmicSA,
  title={Cosmic Strings and Weak Gravitational Lensing},
  author={Sergei Dyda and Robert H. Brandenberger},
  journal={arXiv: Astrophysics},
  year={2007}
}
We study the deflection of light in the background of a "wiggly" cosmic string, and investigate whether it is possible to detect cosmic strings by means of weak gravitational lensing. For straight strings without small-scale structure there are no signals. In the case of strings with small-scale structure leading to a local gravitational attractive force towards the string, there is a small signal, namely a preferential elliptical distortion of the shape of background galaxies in the direction… 

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References

SHOWING 1-10 OF 41 REFERENCES
Gravitational lensing by cosmic string loops.
TLDR
The deflection of a light ray caused by the gravitational field of a cosmic string loop in the weak field limit is calculated and an analytic solution is found for the special case of a circular loop perpendicular to the optical axis.
Observing cosmic string loops with gravitational lensing surveys
We show that the existence of cosmic strings can be strongly constrained by the next generation of gravitational lensing surveys at radio frequencies. We focus on cosmic string loops, which
Searching for a Long Cosmic String Through the Gravitational Lensing Effect
It has been suggested that cosmic strings produced at a phase transition in the early universe can be the origin of the extremely high energy cosmic rays (EHCR) observed by AGASA above 10^20 eV.
Detecting cosmic strings in the CMB with the Canny algorithm
Line discontinuities in cosmic microwave background anisotropy maps are a distinctive prediction of models with cosmic strings. These signatures are visible in anisotropy maps with good angular
Microwave anisotropy due to cosmic strings
There has been much interest in the cosmological consequences of line-like topological defects (‘cosmic strings’) which may be produced in a phase transition in the early Universe1–8. Such strings
Cosmic string production towards the end of brane inflation
Will cosmic strings be discovered using the Space Telescope
Cosmic strings are topologically stable defects in the vacuum which may be produced at a phase transition in the early Universe. Some may form closed loops, and some may be open, extending over the
Weak Gravitational Lensing
This review forms the Weak Lensing part of the Saas-Fee Advanced Course on Gravitational Lensing. It describes the basicsm applications and results of weak lensing. Contents: (1) Introduction (2) The
Will cosmic strings be discovered using the Space Telescope?
Cosmic strings are topologically stable defects in the vacuum which may be produced at a phase transition in the early Universe. Some may form closed loops, and some may be open, extending over the
Observational Constraints on Cosmic String Production During Brane Inflation
Overall, brane inflation is compatible with the recent analysis of the Wilkinson microwave anisotropy probe ~WMAP! data. Here we explore the constraints of WMAP and the 2dF Galaxy Redshift Survey
...
1
2
3
4
5
...