NAOC Open IR  > 射电天文研究部
Radio sources with ultrahigh polarization
Shi, H.1; Liang, H.2; Han, J. L.1; Hunstead, R. W.3
AbstractA 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.
KeywordPolarization Pulsars: General Galaxies: Magnetic Fields Radio Continuum: Galaxies
Indexed BySCI
WOS IDWOS:000284282300030
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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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