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题名: Rotation measure variations for 20 millisecond pulsars
作者: Yan, W. M.1, 2, 3; Manchester, R. N.3; Hobbs, G.3; van Straten, W.4; Reynolds, J. E.3; Wang, N.1, 5; Bailes, M.4; Bhat, N. D. R.4; Burke-Spolaor, S.3; Champion, D. J.6; Chaudhary, A.3; Coles, W. A.7; Hotan, A. W.3; Khoo, J.3; Oslowski, S.3, 4; Sarkissian, J. M.3; Yardley, D. R. B.3, 8
刊名: ASTROPHYSICS AND SPACE SCIENCE
出版日期: 2011-10-01
卷号: 335, 期号:2, 页码:485-498
关键词: Pulsars: general ; ISM: general ; Radio continuum: stars
DOI: 10.1007/s10509-011-0756-0
文章类型: Article
英文摘要: We report on variations in the mean position angle of the 20 millisecond pulsars being observed as part of the Parkes Pulsar Timing Array (PPTA) project. It is found that the observed variations are dominated by changes in the Faraday rotation occurring in the Earth's ionosphere. Two ionospheric models are used to correct for the ionospheric contribution and it is found that one based on the International Reference Ionosphere gave the best results. Little or no significant long-term variation in interstellar RM was found with limits typically about 0.1 rad m(-2) yr(-1) in absolute value. In a few cases, apparently significant RM variations over timescales of a few 100 days or more were seen. These are unlikely to be due to localised magnetised regions crossing the line of sight since the implied magnetic fields are too high. Most probably they are statistical fluctuations due to random spatial and temporal variations in the interstellar electron density and magnetic field along the line of sight.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GALACTIC MAGNETIC-FIELD ; RADIO ASTRONOMICAL POLARIMETRY ; RELATIVISTIC SPIN PRECESSION ; FARADAY-ROTATION ; TIMING PACKAGE ; PSRCHIVE ; PSRFITS ; TEMPO2 ; GALAXY ; MODEL
收录类别: SCI
语种: 英语
WOS记录号: WOS:000294680300019
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15955
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia
4.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
6.Max Planck Inst Radioastron, D-53121 Bonn, Germany
7.Univ Calif San Diego, La Jolla, CA 92093 USA
8.Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW 2006, Australia
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