Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars. Issue 3 (27th April 2022)

• Record Type: Journal Article
• Authors: Liu, K; Antoniadis, J; Bassa, C G; Chen, S; Cognard, I; Gaikwad, M; Hu, H; Jang, J; Janssen, G H; Karuppusamy, R; Kramer, M; Lee, K J; Main, R A; Mall, G; McKee, J W; Mickaliger, M B; Perrodin, D; Sanidas, S A; Stappers, B W; Wang, L; Zhu, W W; Burgay, M; Concu, R; Corongiu, A; Melis, A; Pilia, M; Possenti, A
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 513:Issue 3(2022)
• Page Start: 4037
• Page End: 4044
• Publication Date: 2022-04-27
• Subjects: methods: data analysis -- pulsars: individual (PSR J1022+1001) -- pulsars: individual (PSR J2145−0750) -- pulsars: individual (PSR J1744−1134) -- (transients:) fast radio bursts; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stac1082
• Languages: English
• ISSNs: 0035-8711

Abstract

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 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.