FRB event rate counts - II. Fluence, redshift, and dispersion measure distributions
MetadataShow full item record
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
We examine how the various observable statistical properties of the fast radio burst (FRB) population relate back to their fundamental physical properties in amodel-independent manner. We analyse the flux density and fluence distributions of FRBs as a tool to investigate their luminosity distance distribution and the evolution of their prevalence throughout cosmic history. We examine in detail particular scenarios in which the burst population follows some power of the cosmic star formation rate. FRBs present an important additional measurable over source counts of existing cosmological populations, namely the dispersion measure. Based on the known redshift of FRB121102 (the repeater) we expect at least 50 per cent of the dispersion measure to be attributable to the intergalactic medium and hence it can be used as a proxy for distance. We develop the framework to interpret the dispersion measure distribution, and investigate how the effect of Helium reionization in the intergalactic medium is evident in this distribution. Examination of existing data suggests that the FRB luminosity function is flatter than a critical slope, making FRBs easily detectable to large distances; in this regime the reduction in flux density with distance is outweighed by the increase in the number of bright bursts within the search volume.
Showing items related by title, author, creator and subject.
The critical role of ants in the extensive dispersal of Acacia seeds revealed by genetic parentage assignmentPascov, C.; Nevill, Paul; Elliott, C.; Majer, Jonathan; Anthony, J.; Krauss, S. (2015)Ants are prominent seed dispersal agents in many ecosystems, and dispersal distances are small in comparison with vertebrate dispersal agents. However, the distance and distribution of ant-mediated dispersal in arid/semi-arid ...
Toms, Julianna J. (2008)Partial saturation of porous rock by two fluids substantially affects compressional wave propagation. In particular, partial saturation causes significant attenuation and dispersion due to wave-induced fluid flow. Such ...
Han, J.; Van Straten, W.; Lazio, T.; Deller, A.; Sobey, C.; Xu, J.; Schnitzeler, D.; Imai, H.; Chatterjee, S.; Macquart, Jean-Pierre; Kramer, M.; Cordes, J. (2014)The magneto-ionic structures of the interstellar medium of the Milky Way and the intergalactic medium are still poorly understood, especially at distances larger than a few kiloparsecs from the Sun. The three-dimensional ...