Shanjie Qian1; T P Krichbaum2; Xizhen Zhang1; L Fuhrmann2; G Cimo2; A Kraus2; T Beckert2; S Britzen3; A Witzel2; J A Znsus2
Source Publicationchinesejournalofastronomyandastrophysics
AbstractA very rapid polarization position angle swing of similar to 180 degrees (with a time scale of similar to 6 hours) observed at 2 cm in QSO 1150+812 (z = 1.25) was reported by Kochenov & Gabuzda. This very rare event is difficult to explain. We found a possible interpretation in the framework of a source model consisting of three polarized components, in which two compact polarized components are nearly simultaneously occulted by an interstellar cloud, with consequent focusing-defocusing effects. A specific plasma-lens model is proposed which can reasonably fit the polarized flux density curve with results derived for the two lensed components. Some physical parameters of the plasma-lens and the source components are estimated. The two compact polarized components are estimated to have brightness temperatures of similar to 6 x 1012 K. Thus a bulk relativistic motion with a Lorentz factor less than 10 is required to meet the inverse-Compton limit.
Document Type期刊论文
2.Max-Planck-Institut fur Radioastronomie, Auf dem Hugel 69
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Shanjie Qian,T P Krichbaum,Xizhen Zhang,et al. refractivefocusingbyinterstellarcloudsandtherapidpolarizationangleswinginqso1150812[J]. chinesejournalofastronomyandastrophysics,2006,6(1):1.
APA Shanjie Qian.,T P Krichbaum.,Xizhen Zhang.,L Fuhrmann.,G Cimo.,...&J A Znsus.(2006).refractivefocusingbyinterstellarcloudsandtherapidpolarizationangleswinginqso1150812.chinesejournalofastronomyandastrophysics,6(1),1.
MLA Shanjie Qian,et al."refractivefocusingbyinterstellarcloudsandtherapidpolarizationangleswinginqso1150812".chinesejournalofastronomyandastrophysics 6.1(2006):1.
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