Formation of Black Holes from Collapsed Cosmic String Loops

Details Formation of Black Holes from Collapsed Cosmic String Loops Formation of Black Holes from Collapsed Cosmic String Loops

1995-09-06

arxiv.org/abs/gr-qc/9509012v1

Phys.Rev. D53 (1996) 3002-3010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

uuencoded, compressed postscript; 20 pages including 7 figures

Scientific paper

10.1103/PhysRevD.53.3002

The fraction of cosmic string loops which collapse to form black holes is estimated using a set of realistic loops generated by loop fragmentation. The smallest radius sphere into which each cosmic string loop may fit is obtained by monitoring the loop through one period of oscillation. For a loop with invariant length $L$ which contracts to within a sphere of radius $R$, the minimum mass-per-unit length $\mu_{\rm min}$ necessary for the cosmic string loop to form a black hole according to the hoop conjecture is $\mu_{\rm min} = R /(2 G L)$. Analyzing $25,576$ loops, we obtain the empirical estimate $f_{\rm BH} = 10^{4.9\pm 0.2} (G\mu)^{4.1 \pm 0.1}$ for the fraction of cosmic string loops which collapse to form black holes as a function of the mass-per-unit length $\mu$ in the range $10^{-3} \lesssim G\mu \lesssim 3 \times 10^{-2}$. We use this power law to extrapolate to $G\mu \sim 10^{-6}$, obtaining the fraction $f_{\rm BH}$ of physically interesting cosmic string loops which collapse to form black holes within one oscillation period of formation. Comparing this fraction with the observational bounds on a population of evaporating black holes, we obtain the limit $G\mu \le 3.1 (\pm 0.7) \times 10^{-6}$ on the cosmic string mass-per-unit-length. This limit is consistent with all other observational bounds.

Affiliated with

Also associated with

No associations

Rating

Formation of Black Holes from Collapsed Cosmic String Loops 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 Formation of Black Holes from Collapsed Cosmic String Loops, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of Black Holes from Collapsed Cosmic String Loops will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-171005