Investigation of Individual Pulse Emission Behaviors from Pulsar J1741-0840

被引：0
|
作者：
Xu, Y. H. [1 ]
Wen, Z. G. [2 ,8 ]
Yuan, J. P. [2 ]
Wang, Z. [2 ,3 ,5 ]
Duan, X. F. [2 ,4 ]
Wang, Z. [2 ,3 ,5 ]
Wang, N. [2 ]
Wang, M. [1 ]
Wang, H. G. [6 ]
Rusul, A. [7 ]
Hao, L. F. [1 ]
Han, W. [2 ]
机构：
[1] Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
[2] Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
[3] Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Xinjiang, Peoples R China
[4] Key Lab Microwave Technol, Urumqi 830011, Xinjiang, Peoples R China
[5] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
[6] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Guangdong, Peoples R China
[7] Kashi Univ, Inst Phys & Elect Engn, Kashgar 844009, Xinjiang, Peoples R China
[8] Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2024年 / 977卷 / 01期
基金：
中国国家自然科学基金;
关键词：
SINGLE-PULSE; STATISTICAL-ANALYSIS; SUBPULSE MODULATION; RADIO PULSARS; FLUX-DENSITY; POLARIZATION; PROFILES; NULLS; POLARIMETRY; FREQUENCIES;
D O I：
10.3847/1538-4357/ad7fe2
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have carried out a detailed study of individual pulse emission from the pulsar J1741-0840 (B1738-08) observed using the Parkes and Effelsberg radio telescopes at the L band. The pulsar exhibits four emission components, which are not well resolved by employing multicomponent Gaussian fitting. The radio emission originates at a height of approximately 1000 km, with the viewing geometry characterized by inclination and impact angles roughly estimated at 81 degrees and 3 degrees, respectively. Fluctuation spectral analysis of single pulse behavior reveals two prominent periodicities, around 32 and five rotation periods. The longer periodic modulation feature is linked to nulling behavior across the entire emission window, with an updated nulling fraction of 23% +/- 2% derived from pulse energy distribution via Gaussian mixture modeling. In addition to quasiperiodic nulling, the pulsar also exhibits the presence of subpulse drifting in the trailing component, with the shorter periodic feature in the fluctuation spectra related to the phenomenon of subpulse drifting, and the longitudinal separation estimated to be about 5 degrees. Both periodic modulations show significant temporal evolution with time-dependent fluctuation power. The implications of understanding the radio emission mechanisms are discussed.
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页数：12
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