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Long-term scintillation observations of five pulsars at 1540 MHz
Wang, N1,2,3; Manchester, RN3; Johnston, S2; Rickett, B4; Zhang, J1; Yusup, A1; Chen, M1
2005-03-21
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume358Issue:1Pages:270-282
Contribution Rank1
Abstract

From 2001 January to 2002 June, we monitored PSRs B0329+54, B0823+26, B1929+10, B2020+28 and B2021+51 using the Nanshan 25-m radio telescope of the Urumqi Observatory to study their diffractive interstellar scintillation (DISS). The average interval between observations was about 9 d and the observation duration ranged between 2 and 6 h depending on the pulsar. Wide variations in the DISS parameters were observed over the 18-month data span. Despite this, the average scintillation velocities are in excellent agreement with the proper motion velocities. The average two-dimensional autocorrelation function for PSR B0329+54 is well described by a thin-screen Kolmogorov model, at least along the time and frequency axes. Observed modulation indices for the DISS time-scale and bandwidth and the pulsar flux density are greater than values predicted for a Kolmogorov spectrum of electron density fluctuations. Correlated variations over times that are long compared to the nominal refractive scintillation time are observed, suggesting that larger scale density fluctuations are important. For these pulsars, the scintillation bandwidth as a function of frequency has a power-law index (similar to 3.6) much less than that expected for Kolmogorov turbulence (similar to 4.4). Sloping fringes are commonly observed in the dynamic spectra, especially for PSR B0329+54. The detected range of fringe slopes are limited by our observing resolution. Our observations are sensitive to larger-scale fringes and hence smaller refractive angles, corresponding to the central part of the scattering disc.

Correspondent Emailna.wang@xao.ac.cn
KeywordIsm : General Ism : Structure Pulsars : General
SubtypeArticle
Subject Area致密天体、高能和基础物理
DOI10.1111/j.1365-2966.2005.08789.x
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordRefractive Interstellar Scintillation ; Density Fluctuations ; Space Velocities ; Plasma-density ; Radio Pulsars ; Psr b0329+54 ; Spectrum ; Scattering ; Turbulence ; Frequency
Funding Project脉冲星研究团组
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000227478900026
Funding OrganizationNNSFC under the project of 10173020
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/81
Collection射电天文研究室_脉冲星研究团组
中国科学院新疆天文台
射电天文研究室
其它
Corresponding AuthorWang, N
Affiliation1.National Astronomical Observatories, CAS, 40-5 South Beijing Road, Urumqi, 830011, China
2.School of Physics, University of Sydney, NSW 2006, Australia
3.Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 1710, Australia
4.Department of Electrical and Computer Engineering, University of California, San Diego, CA 92093, USA
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, N,Manchester, RN,Johnston, S,et al. Long-term scintillation observations of five pulsars at 1540 MHz[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,358(1):270-282.
APA Wang, N.,Manchester, RN.,Johnston, S.,Rickett, B.,Zhang, J.,...&Chen, M.(2005).Long-term scintillation observations of five pulsars at 1540 MHz.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,358(1),270-282.
MLA Wang, N,et al."Long-term scintillation observations of five pulsars at 1540 MHz".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 358.1(2005):270-282.
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