Variations of P-2 in subpulse drifting pulsars

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	Variations of P-2 in subpulse drifting pulsars
	Yuen, R.1,2,3 ; Melrose, D. B.3; Samsuddin, M. A.4; Tu, Z. Y.1 ; Han, X. H.1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-06-11
通讯作者邮箱	ryuen@physics.usyd.edu.au
卷号	459 期号:1 页码:603-609
关键词	radiation mechanisms: non-thermal pulsars: general
ISSN号	0035-8711
通讯作者	Yuen, R.
英文摘要	We develop a model for subpulse separation period, P-2, taking into account both the apparent motion of the visible point as a function of pulsar phase, Psi, and the possibility of abrupt jumps between different rotation states in non-corotating pulsar magnetospheres. We identify three frequencies: (i) the spin frequency of the star, (ii) the drift frequency of the magnetospheric plasma in the source region and (iii) the angular frequency of the visible point around its trajectory. We show how the last of these, which is neglected in traditional models by implicitly assuming the line of sight through the centre of the star, affects the interpretation of P-2. We attribute the subpulse structure to emission frommantinodes distributed uniformly in azimuthal angle about the magnetic axis. We showthat variations of P-2 as a function of rotational phase or observing frequency arise naturally when the motion of the visible point is taken into account. We discuss possible application of our model in signifying overall field-line distortion at the emitting region. Abrupt changes in P-2 can occur during state switching in the magnetosphere. We demonstrate that the unique value of P-2 in each rotation state can be used, in principle, to relate the rotation state of the magnetospheres to subpulse drifting.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	RADIO-EMISSION ALTITUDE ; FREQUENCY-DEPENDENCE ; MAGNETIC-FIELD ; PSR B0031-07 ; MAGNETOSPHERE ; RADIATION ; GEOMETRY ; POLARIZATION ; MODULATION ; PULSES
收录类别	SCI
语种	英语
WOS记录号	WOS:000376386600047
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/1398]
专题	脉冲星研究团组新疆天文台_射电天文研究室新疆天文台_应用天文研究室
作者单位	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, Urumqi 830011, Xinjiang, Peoples R China 3.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 4.Univ Malaya, Kuala Lumpur 50603, Malaysia
推荐引用方式 GB/T 7714	Yuen, R.,Melrose, D. B.,Samsuddin, M. A.,et al. Variations of P-2 in subpulse drifting pulsars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(1):603-609.
APA	Yuen, R.,Melrose, D. B.,Samsuddin, M. A.,Tu, Z. Y.,&Han, X. H..(2016).Variations of P-2 in subpulse drifting pulsars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(1),603-609.
MLA	Yuen, R.,et al."Variations of P-2 in subpulse drifting pulsars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.1(2016):603-609.