Constraints on the cosmic string loop collapse fraction from Primordial Black Holes

Abstract

A small fraction, $f$, of cosmic string loops can collapse to form Primordial Black Holes (PBHs). Constraints on the abundance of PBHs can therefore be used to constrain $f$. We update these calculations, taking into account the PBH extended mass function, and find $f<10^{-31}(G\mu /c^2{)}^{-3/2}$. This is roughly two orders of magnitude tighter than previous constraints. The improvement from the tighter constraints on the abundance of PBHs is partly off-set by refinements to the theoretical calculation of the cosmic string loop formation rate.

arXiv comment5 pages, v2: takes into account only a fraction of string network energy goes into long loops, constraints consequently weakened by one order of magnitude (thank you to referee for pointing this out) + other minor changes

References in corpus (20)

• New cosmological constraints on primordial black holes
• Gravitational waves from binary supermassive black holes missing in pulsar observations
• Primordial black hole constraints for extended mass functions
• The number of cosmic string loops
• Large parallel cosmic string simulations: New results on loop production
• Cosmic Strings and Superstrings
• Gravitational-wave cosmology across 29 decades in frequency
• New limits on cosmic strings from gravitational wave observation
• Constraints on cosmic strings using data from the first Advanced LIGO observing run
• Constraints on primordial black holes from Galactic gamma-ray background
• Do Evaporating Black Holes Form Photospheres?
• Seeking String Theory in the Cosmos
• Formation of Black Holes from Collapsed Cosmic String Loops
• X-ray and gamma-ray limits on the primordial black hole abundance from Hawking radiation
• Limits on Black Hole Formation from Cosmic String Loops
• Cosmic Strings and Cosmic Superstrings
• Cosmic String Loop Collapse in Full General Relativity
• Energy-conservation constraints on cosmic string loop production and distribution functions
• Constraints on Cosmic Strings due to Black Holes Formed from Collapsed Cosmic String Loops
• An improved gamma-ray limit on the density of PBHs

Cited by in corpus (11)

• Constraints on Primordial Black Holes
• PBH formation from spherically symmetric hydrodynamical perturbations: a review
• Primordial black hole formation with full numerical relativity
• Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
• Primordial black holes from cusp collapse on cosmic strings
• Rogue worlds meet the dark side: revealing terrestrial-mass primordial black holes with the Nancy Grace Roman Space Telescope
• Primordial Black Hole Formation in Non-Standard Post-Inflationary Epochs
• Primordial black holes: constraints, potential evidence and prospects
• Spinning Primordial Black Holes from First Order Phase Transition
• Primordial black hole isocurvature modes from non-Gaussianity
• No black holes from cosmic string cusps