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    Five new fast radio bursts from the HTRU high-latitude survey at Parkes: First evidence for two-component bursts

    242012_242012.pdf (465.6Kb)
    Access Status
    Open access
    Authors
    Champion, D.
    Petroff, E.
    Kramer, M.
    Keith, M.
    Bailes, M.
    Barr, E.
    Bates, S.
    Bhat, Ramesh
    Burgay, M.
    Burke-Spolaor, S.
    Flynn, M.
    Jameson, A.
    Johnston, S.
    Ng, C.
    Levin, L.
    Possenti, A.
    Stappers, B.
    van Straten, W.
    Thornton, D.
    Tiburzi, C.
    Lyne, A.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Champion, D. and Petroff, E. and Kramer, M. and Keith, M. and Bailes, M. and Barr, E. and Bates, S. et al. 2016. Five new fast radio bursts from the HTRU high-latitude survey at Parkes: First evidence for two-component bursts. Monthly Notices of the Royal Astronomical Society: Letters. 460 (1): pp. L30-L34.
    Source Title
    Monthly Notices of the Royal Astronomical Society: Letters
    DOI
    10.1093/mnrasl/slw069
    ISSN
    1745-3925
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/34022
    Collection
    • Curtin Research Publications
    Abstract

    The detection of five new fast radio bursts (FRBs) found in the 1.4-GHz High Time Resolution Universe high-latitude survey at Parkes, is presented. The rate implied is 7+5-3 × 103 (95 per cent) FRBs sky-1 d-1 above a fluence of 0.13 Jy ms for an FRB of 0.128 ms duration to 1.5 Jy ms for 16 ms duration. One of these FRBs has a two-component profile, in which each component is similar to the known population of single component FRBs and the two components are separated by 2.4 ± 0.4 ms. All the FRB components appear to be unresolved following deconvolution with a scattering tail and accounting for intrachannel smearing. The two-component burst, FRB 121002, also has the highest dispersion measure (1629 pc cm-3) of any FRB to-date. Many of the proposed models to explain FRBs use a single high-energy event involving compact objects (such as neutron-star mergers) and therefore cannot easily explain a two-component FRB. Models that are based on extreme versions of flaring, pulsing, or orbital events, however, could produce multiple component profiles. The compatibility of these models and the FRB rate implied by these detections is discussed.

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