Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D

Details Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D

2012-02-20

arxiv.org/abs/1202.4487v4

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

27 figures some corrections in text; 26 feb.: lay-out improved; 1 mrt.: minor corrections in text and type-errors. apr: some m

Scientific paper

We present the "classical" Nielsen-Olesen vortex solution on a warped five dimensional space time, where we solved the effective four-dimensional equations from the five-dimensional equations together with the junction and boundary conditions. Four dimensional cosmic strings show some serious problems concerning the mechanism of string smoothing related to the string mass per unit length, $G\mu \leq 10^{-6}$. Moreover, there is no observational evidence of axially symmetric lensing effect caused by cosmic strings. Also super-massive cosmic strings ($G\mu\gtrsim 1$), predicted by superstring theory, possess some problems. They are studied because the universe may have undergone phase transitions at scales much higher than the GUT scale. But $G\mu \gtrsim 1$ is far above observational bounds, so one needs an inflationary scenario to smooth them out. Further, it is believed that these super-massive strings could never have extended to macroscopic size. Brane-world models could overcome these problems. $G\mu$ could be warped down to GUT scale, even if its value was at the Planck scale. In our warped cosmic string model, where the string mass per unit length in the bulk can be of order of the Planck scale, we find that the four dimensional brane space time is exponential warped down. Moreover, asymptotically the induced four dimensional space time doesn't show conical behavior. So there is no angle deficit compared to its value in the bulk and the space time seems to be un-physical, at least under fairly weak assumptions on the stress-energy tensor and without a positive brane tension. The results are confirmed by numerical solutions of the field equations.

Affiliated with

Also associated with

No associations

Rating

Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Warped Self-Gravitating U(1) Gauge Cosmic Strings in 5D will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-422179