10 Facts About Cosmic string

In field theory, the Cosmic string width is set by the scale of the symmetry breaking phase transition.

The only gravitational effect of a straight cosmic string is a relative deflection of matter passing the string on opposite sides.

Standard model of a cosmic string is a geometrical structure with an angle deficit, which thus is in tension and hence has positive mass.

Exterior geometry of a cosmic string can be visualized in an embedding diagram as follows: Focusing on the two-dimensional surface perpendicular to the string, its geometry is that of a cone which is obtained by cutting out a wedge of angle d and gluing together the edges.

Gravitational lensing of a galaxy by a straight section of a cosmic string would produce two identical, undistorted images of the galaxy.

Piece of evidence supporting cosmic string theory is a phenomenon noticed in observations of the "double quasar" called Q0957+561A, B Originally discovered by Dennis Walsh, Bob Carswell, and Ray Weymann in 1979, the double image of this quasar is caused by a galaxy positioned between it and the Earth.

Schild and his team believe that the only explanation for this observation is that a cosmic string passed between the Earth and the quasar during that time period traveling at very high speed and oscillating with a period of about 100 days.

Currently the most sensitive bounds on cosmic string parameters come from the non-detection of gravitational waves by Pulsar timing array data.

Cosmic string concluded that had they been produced they would have either disintegrated into smaller strings before ever reaching macroscopic scales, they would always appear as boundaries of domain walls whose tension would force the strings to collapse rather than grow to cosmic scales, or having a characteristic energy scale close to the Planck energy they would be produced before cosmological inflation and hence be diluted away with the expansion of the universe and not be observable.

Furthermore, various dualities that have been discovered point to the conclusion that actually all these apparently different types of Cosmic string are just the same object as it appears in different regions of parameter space.