Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars

Journal
Date Issued
2022
Author(s)
Liu, K.
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Antoniadis, J.
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Bassa, C. G.
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Chen, S.
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Cognard, I.
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Gaikwad, M.
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Hu, H.
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Jang, J.
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Janssen, G. H.
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Karuppusamy, R.
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Kramer, M.
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Lee, K. J.
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Main, R. A.
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Mall, G.
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McKee, J. W.
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Mickaliger, M. B.
•
•
Sanidas, S. A.
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Stappers, B. W.
•
Wang, L.
•
Zhu, W. W.
•
•
•
•
•
•
DOI
Abstract
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 polarised. In PSR J1022+1001, the linear polarisation 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 explains 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.
Volume
513
Issue
3
Start page
4037
Uri
Url
Issn Identifier
0035-8711
Rights
open.access
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