Daily observations of interstellar scintillation in PSR B0329+54

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 脉冲星研究团组

	Daily observations of interstellar scintillation in PSR B0329+54
	N. Wang; Z. Yan; R. N. Manchester; H. X. Wang
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2008-04
卷号	385 期号:3 页码:1393-1401
关键词	pulsars PSR b0329+54 ISM structure
ISSN号	0035-8711
通讯作者	na.wang@xao.ac.cn
英文摘要	Quasi-continuous observations of PSR B03239+54 over 20 d using the Nanshan 25-m telescope at 1540 MHz have been used to study the effects of refractive scintillation on the pulsar flux density and diffractive scintillation properties. Dynamic spectra were obtained from data sets of 90 min duration and diffractive parameters derived from a two-dimensional auto-correlation analysis. Secondary spectra were also computed but these showed no significant evidence for arc structure. Cross-correlations between variations in the derived parameters were much lower than predicted by thin-screen models and in one case was of opposite sign to the prediction. Observed modulation indices were larger than predicted by thin-screen models with a Kolmogorov fluctuation spectrum. Structure functions were computed for the flux density, diffractive time-scale and decorrelation bandwidth. These indicated a refractive time-scale of 8 +/- 2 h, much shorter than predicted by the thin-screen model. The measured structure function slope of 0.4 +/- 0.2 is also inconsistent with scattering by a single thin screen for which a slope of 2.0 is expected. All observations are consistent with scattering by an extended medium having a Kolmogorov fluctuation spectrum which is concentrated towards the pulsar. This interpretation is also consistent with recent observations of multiple diffuse scintillation arcs for this pulsar.
学科主题	致密天体、高能和基础物理
收录类别	SCI
资助信息	国家自然科学基金
原文出处	http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966/issues
语种	英语
WOS记录号	WOS:000254604600021
公开日期	2013-03-06
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/108]
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_其它
推荐引用方式 GB/T 7714	N. Wang,Z. Yan,R. N. Manchester,et al. Daily observations of interstellar scintillation in PSR B0329+54[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,385(3):1393-1401.
APA	N. Wang,Z. Yan,R. N. Manchester,&H. X. Wang.(2008).Daily observations of interstellar scintillation in PSR B0329+54.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,385(3),1393-1401.
MLA	N. Wang,et al."Daily observations of interstellar scintillation in PSR B0329+54".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 385.3(2008):1393-1401.