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

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.
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https://hal-insu.archives-ouvertes.fr/insu-03672004
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Thursday, May 19, 2022 - 9:03:37 AM
Last modification on : Friday, May 20, 2022 - 3:36:54 AM

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K. Liu, J. Antoniadis, C. G. Bassa, S. Chen, Ismaël Cognard, et al.. Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2022, ⟨10.1093/mnras/stac1082⟩. ⟨insu-03672004⟩

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