Single-pulse observations of the Galactic centre magnetar PSR J1745-2900 at 3.1 GHz

被引:11
作者
Yan, W. M. [1 ,2 ,3 ]
Wang, N. [1 ,2 ,3 ]
Manchester, R. N. [4 ]
Wen, Z. G. [1 ,2 ,3 ]
Yuan, J. P. [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci,1 St, Urumqi 830011, Xinjiang, Peoples R China
[2] Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
[3] Xinjiang Key Lab Radio Astrophys, 150 Sci,1 St, Urumqi 830011, Xinjiang, Peoples R China
[4] Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia
基金
中国国家自然科学基金;
关键词
stars; magnetars stars; neutron pulsars; general pulsars; individual; PSR J1745-2900; POLARIZED RADIO-EMISSION; SOFT GAMMA-REPEATERS; NEUTRON-STARS; MODULATION PROPERTIES; SGR J1745-2900; X-RAY; TELESCOPE; J1810-197; SPECTRUM; FIELD;
D O I
10.1093/mnras/sty470
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report on single-pulse observations of the Galactic centre magnetar PSR J1745-2900 that were made using the Parkes 64-m radio telescope with a central frequency of 3.1 GHz at five observing epochs between 2013 July and August. The shape of the integrated pulse profiles was relatively stable across the five observations, indicating that the pulsar was in a stable state between MJDs 56475 and 56514. This extends the known stable state of this pulsar to 6.8 months. Short-term pulse shape variations were also detected. It is shown that this pulsar switches between two emission modes frequently and that the typical duration of each mode is about 10 min. No giant pulses or subpulse drifting were observed. Apparent nulls in the pulse emission were detected on MJD 56500. Although there are many differences between the radio emissions of magnetars and normal radio pulsars, they also share some properties. The detection of mode changing and pulse nulling in PSR J1745-2900 suggests that the basic radio emission process for magnetars and normal pulsars is the same.
引用
收藏
页码:3677 / 3687
页数:11
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