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    FRB event rate counts - II. Fluence, redshift, and dispersion measure distributions

    272020.pdf (1.809Mb)
    Access Status
    Open access
    Authors
    Macquart, Jean-Pierre
    Ekers, Ronald
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Macquart, J. and Ekers, R. 2018. FRB event rate counts - II. Fluence, redshift, and dispersion measure distributions. Monthly Notices of the Royal Astronomical Society. 480 (3): pp. 4211-4230.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/MNRAS/STY2083
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP180100857
    Remarks

    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.

    URI
    http://hdl.handle.net/20.500.11937/73290
    Collection
    • Curtin Research Publications
    Abstract

    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.

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