PSR J0826+2637的模式变换特性研究

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doi:10.12202/j.0476-0301.2022067

贵州师范大学物理与电子科学学院，550025，贵州贵阳

基金项目:国家自然科学基金资助项目（U1731238）；贵州省自然科学基金资助项目（ZK[2022]304）；贵州省教育厅基金资助项目（KY(2020) 003）

详细信息

通讯作者:
支启军（1979-），男，博士，教授.研究方向：理论物理、天体物理.E-mail:qjzhi@gznu.edu.cn

中图分类号:P161.3
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- 文章访问数:74
- HTML全文浏览量:24
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- 被引次数:0
出版历程
- 收稿日期:2022-03-31
- 录用日期:2022-04-26
- 网络出版日期:2022-11-17
- 刊出日期:2023-02-01

Mode change characteristics of PSR J0826+2637

School of Physics and Electronic Science, Guizhou Normal University, 550025, Guiyang, Guizhou, China

摘要

摘要:利用FAST在中心频率为1.25 GHz的观测数据，分析了PSR J0826+2637的单脉冲能量分布和调制特性，发现存在新的模式变换，并探讨了不同模式的平均脉冲轮廓和偏振特性．结果显示：在B模式中存在强、弱2种模式，弱模式中存在脉冲消零(PN)现象，脉冲消零比（NF）为2.7%；在强、弱2种模式中，中间脉冲的偏振结果差异较小，而主脉冲的变化较大．PSR J0826+2637的模式变换特性很难用现有的模型来解释．
- 脉冲星/
- 模式变换/
- 偏振/
- PSR J0826+2637
Abstract:The FAST observation data at center frequency of 1.25 GHz are used to analyze energy distribution and modulation characteristics of single pulse of PSR J0826+2637．A new mode change is found, average pulse profile and polarization characteristics of different modes are discussed．Strong and weak modes are present in B mode, a PN phenomenon is found in weak mode, with NF of 2.7%．In both strong and weak modes, polarization results of inter-pulse are slightly different, while the main pulse changes greatly．The mode change characteristics of PSR J0826+2637 are difficult to explain with existing models．
- pulsars/
- mode change/
- polarization/
- PSR J0826+2637

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图 1300个连续单脉冲序列

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图 2对应单脉冲序列的相对能量

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图 3所有单脉冲的脉冲能量分布

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图 4PSR J0826+2637的LRFS和2DFS分析

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图 5单脉冲的相对能量示意

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图 6不同模式的平均脉冲轮廓

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图 7不同模式下的脉冲偏振轮廓

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图 8强、弱模式下偏振轮廓的对比结果

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表 1不同模式的偏振和轮廓参数

模式		L/I	V/I	$ \left\|V\right\| $/I	W₅₀	W₁₀
模式		%			(°)
所有脉冲	所有成分	21.10±0.01	1.61±0.02	2.63±0.01	—	—
	主脉冲	20.95±0.01	1.62±0.01	2.67±0.01	3.95±0.02	9.06±0.19
	中间脉冲	30.43±0.53	1.23±0.67	0.08±0.41	—	—
强模式	所有成分	23.26±0.01	1.10±0.01	2.39±0.01	—	—
	主脉冲	23.19±0.01	1.12±0.01	2.40±0.01	3.99±0.02	8.70±0.21
	中间脉冲	33.01±0.94	−0.76±1.34	0.69±0.80	—	—
弱模式	所有成分	16.95±0.03	2.64±0.04	3.55±0.03	—	—
	主脉冲	16.48±0.02	2.72±0.04	3.67±0.02	3.68±0.07	9.47±0.22
	中间脉冲	29.77±0.58	0.43±0.78	0.32±0.45	—	—

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