Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 513, Issue 3, Pages 4037-4044Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac1082
Keywords
methods: data analysis; pulsars: individual (PSR J1022+1001); pulsars: individual (PSR J2145-0750); pulsars: individual (PSR J1744-1134); (transients:) fast radio bursts
Categories
Funding
- European Research Council for the ERC Synergy Grant BlackHoleCam [610058]
- Stavros Niarchos Foundation (SNF)
- Hellenic Foundation for Research and Innovation (H.F.R.I.) [01431]
- Ontario Research Fund-research Excellence Program (ORF-RE)
- Natural Sciences and Engineering Research Council of Canada (NSERC) [CRD 523638-18]
- ERC Advanced Grant 'LEAP' [227947]
- STFC in the UK
- NWO
- Department of Universities and Research (MIUR)
- Italian Space Agency (ASI)
- Autonomous Region of Sardinia (RAS)
- National SKA Program of China [2020SKA0120100]
- National Natural Science Foundation of China [12041304, 11873067]
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This study reports the detection of quasi-periodic micro-structure in three millisecond pulsars using high time resolution data. The occurrence rate of micro-structure is consistent among pulses with different peak flux densities, and it often exhibits high linear polarization. The results provide valuable insights into the dependency of micro-structure properties and its potential link to fast radio bursts.
We report on the detection of quasi-periodic micro-structure in three millisecond pulsars (MSPs), PSRs J1022+1001, J2145-0750, and J1744-1134, using high time resolution data acquired with the Large European Array for Pulsars at a radio frequency of 1.4 GHz. The occurrence rate of quasi-periodic micro-structure is consistent among pulses with different peak flux densities. Using an auto-correlation analysis, we measure the periodicity and width of the micro-structure in these three pulsars. The detected micro-structure from PSRs J1022+1001 and J1744-1134 is often highly linearly polarized. In PSR J1022+1001, the linear polarization position angles of micro-structure pulses are in general flat with a small degree of variation. Using these results, we further examine the frequency and rotational period dependency of micro-structure properties established in previous work, along with the angular beaming and temporal modulation models that explain the appearance of micro-structure. We also discuss a possible link of micro-structure to the properties of some of the recently discovered fast radio bursts which exhibit a very similar emission morphology.
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