Visibility of Pulsar Emission: Motion of the Visible Point

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	Visibility of Pulsar Emission: Motion of the Visible Point
	Yuen, R.1,2,3 ; Melrose, D. B.1
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
	2014-10-08
卷号	31
关键词	radiation mechanisms: non-thermal pulsar: general
英文摘要	A standard model for the visibility of pulsar radio emission is based on the assumption that the emission is confined to a narrow cone about the tangent to a dipolar field line. The widely accepted rotating vector model (RVM) is an approximation in which the line of sight is fixed and the field line is not strictly tangent to it. We refer to an exact treatment (Gangadhara, 2004) as the tangent model. In the tangent model (but not in the RVM) the visible point changes as a function of pulsar rotational phase, psi, defining a trajectory on a sphere of radius r. We solve for the trajectory and for the angular velocity of the visible point around it. We note the recent claim that this motion is observable using interstellar holography (Pen et al., 2014). We estimate the error introduced by use of the RVM and find that it is significant for pulsars with emission over a wide range of psi. The RVM tends to underestimate the range of psi over which emission is visible. We suggest that the geometry alone strongly favors the visible pulsar radio being emitted at a heights more than ten percent of the light-cylinder distance, where our neglect of retardation effects becomes significant.
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 ; POLARIZATION ; RADIATION ; ALTITUDE ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000342737900001
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/606]
专题	脉冲星研究团组新疆天文台_射电天文研究室
作者单位	1.Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia 2.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Yuen, R.,Melrose, D. B.. Visibility of Pulsar Emission: Motion of the Visible Point[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2014,31.
APA	Yuen, R.,&Melrose, D. B..(2014).Visibility of Pulsar Emission: Motion of the Visible Point.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,31.
MLA	Yuen, R.,et al."Visibility of Pulsar Emission: Motion of the Visible Point".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 31(2014).