期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 515, 期 3, 页码 3698-3702出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac2101
关键词
fast radio bursts
资金
- Australian Government
- National Science Foundation (NSF) [PHY1430284]
- Japan Society for the Promotion of Science (JSPS) KAKENHI [20J20509]
- JSPS Overseas Challenge Program for Young Researchers
This study presents four new fast radio bursts (FRBs) discovered in the Parkes 70-cm pulsar survey data archive. These FRBs have significantly larger widths than previously detected ones, suggesting the presence of a larger population of wide-pulse FRBs. The study also highlights the importance of pulsar survey archives as a source of previously undetected FRBs.
We present four new fast radio bursts discovered in a search of the Parkes 70-cm pulsar survey data archive for dispersed single pulses and bursts. We searched dispersion measures (DMs) ranging between 0 and 5000 pc cm(-3) with the HEIMDALL and FETCH detection and classification algorithms. All four of the fast radio bursts (FRBs) discovered have significantly larger widths (>50 ms) than almost all of the FRBs detected and catalogued to date. The large pulse widths are not dominated by interstellar scattering or dispersive smearing within channels. One of the FRBs has a DM of 3338 pc cm(3), the largest measured for any FRB to date. These are also the first FRBs detected by any radio telescope so far, predating the Lorimer Burst by almost a decade. Our results suggest that pulsar survey archives remain important sources of previously undetected FRBs and that searches for FRBs on time-scales extending beyond similar to 100 ms may reveal the presence of a larger population of wide-pulse FRBs.
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