• Corpus ID: 117607440

Cosmic Strings and Weak Gravitational Lensing

  title={Cosmic Strings and Weak Gravitational Lensing},
  author={Sergei Dyda and Robert H. Brandenberger},
  journal={arXiv: Astrophysics},
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… 

Figures from this paper

Radio jets and galaxies as cosmic string probes
The lensing effect of a cosmic string is studied, and some new methods are proposed to detect the cosmic string. The technique for using jets as extended gravitational lensing probes was first
Impact of radiative decay on cosmic string dynamics at small scales
Cosmic strings are topological defects appearing as extended solutions in many high energy physics scenarios. Observation of signatures expected due to the presence of cosmic string networks could
Inflation in string cosmology
Cosmic inflation is responsible for the primordial density fluctuations which are the seeds of today's large-scale structures and which are observed through the temperature fluctuations of the Cosmic
Gravitational Waves from Broken Cosmic Strings: The Bursts and the Beads
We analyze the gravitational wave signatures of a network of metastable cosmic strings. We consider the case of cosmic string instability to breakage, with no primordial population of monopoles. This
Perturbations of Spacetime around a Stationary Rotating Cosmic String
We consider the metric perturbations around a stationary rotating Nambu-Goto string in Minkowski spacetime. By solving the linearized Einstein equations, we study the effects of azimuthal
Cosmic strings and superstrings
  • E. Copeland, T. Kibble
  • Physics
    Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2010
Cosmic strings are predicted by many field-theory models, and may have been formed at a symmetry-breaking transition early in the history of the universe, such as that associated with grand
Gravitational Wave Bursts from Cosmic Superstring Reconnections
We compute the gravitational waveform produced by cosmic superstring reconnections. This is done by first constructing the superstring reconnection trajectory, which closely resembles that of
Fe b 20 08 Cosmic
Cosmic superstrings are expected to be formed at the end of brane inflation, within the context of brane-world cosmological models inspired from string theory. By studying properties of cosmic
Covariant Vertex Operators for Cosmic Strings
We construct complete sets of (open and closed string) covariant coherent state and mass eigenstate vertex operators in bosonic string theory. By minimally extending the standard definition of
Cosmic superstrings
  • M. Sakellariadou
  • Physics, Medicine
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2008
The properties of cosmic superstring networks are studied and their phenomenological consequences against observational data are compared to pin down the successful and natural inflationary model and get an insight into the stringy description of the authors' Universe.


Gravitational lensing by cosmic string loops.
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