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Radio sources with ultrahigh polarization
Shi, H.1; Liang, H.2; Han, J. L.1; Hunstead, R. W.3
2010-12-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号409期号:2页码:821-838
摘要A sample of 129 unresolved radio sources with ultrahigh linear polarization (>30 per cent) has been selected from the NRAO VLA Sky Survey. Such high average linear polarization is unusual in extragalactic sources. Higher resolution Australia Telescope Compact Array and Very Large Array observations confirm the high average polarization but find that most of these sources are extended. The Sloan Digital Sky Survey spectroscopy, where available, shows that the optical counterparts are elliptical galaxies with no detectable emission lines. The optical spectra, radio luminosity, linear size and spectral index of these sources are typical of radio-loud active galactic nuclei. Galaxy counts within a 1 Mpc radius of the radio sources show that these highly polarized sources are in environments similar to their low polarization (<2 per cent) counterparts. Similarly, the line-of-sight environments of the ultrahigh polarization sources are on average indistinguishable from those of the low-polarization sources. We conclude that the extraordinarily high average polarization must be due to intrinsic properties of the sources, such as an extremely ordered source magnetic field, low internal thermal plasma density or a preferential orientation of the source magnetic field perpendicular to the line of sight.
关键词Polarization Pulsars: General Galaxies: Magnetic Fields Radio Continuum: Galaxies
DOI10.1111/j.1365-2966.2010.17347.x
收录类别SCI
语种英语
WOS记录号WOS:000284282300030
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7716
专题射电天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Nottingham Trent Univ, Sch Sci & Technol, Nottingham NG11 8NS, England
3.Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
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GB/T 7714
Shi, H.,Liang, H.,Han, J. L.,et al. Radio sources with ultrahigh polarization[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,409(2):821-838.
APA Shi, H.,Liang, H.,Han, J. L.,&Hunstead, R. W..(2010).Radio sources with ultrahigh polarization.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,409(2),821-838.
MLA Shi, H.,et al."Radio sources with ultrahigh polarization".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 409.2(2010):821-838.
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