Five new fast radio bursts from the HTRU high-latitude survey at Parkes: first evidence for two-component bursts
Date Issued
2016
Author(s)
Champion, D. J.
•
Petroff, E.
•
Kramer, M.
•
Keith, M. J.
•
Bailes, M.
•
Barr, E. D.
•
Bates, S. D.
•
Bhat, N. D. R.
•
•
Burke-Spolaor, S.
•
Flynn, C. M. L.
•
Jameson, A.
•
Johnston, S.
•
Ng, C.
•
Levin, L.
•
•
Stappers, B. W.
•
van Straten, W.
•
Thornton, D.
•
•
Lyne, A. G.
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}× 10^3 (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.
Volume
460
Issue
1
Start page
L30
Issn Identifier
0035-8711
Ads BibCode
2016MNRAS.460L..30C
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
Champion2016_arXiv.pdf
Description
postprint
Size
544.63 KB
Format
Adobe PDF
Checksum (MD5)
601fac4cee100b9b954e240d7ae0a01a
Loading...
Name
Champion2016.pdf
Description
pdf editoriale
Size
495.4 KB
Format
Adobe PDF
Checksum (MD5)
67e64490ea02d15bacf3b0c3fcf47027