Faraday rotation in the MOJAVE blazars: 3C 273 a case study

Faraday rotation in the MOJAVE blazars: 3C 273 a case study
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莫哈韦耀变体中的法拉第旋转:3C 273 案例研究

DOI:
10.1088/1742-6596/355/1/012008
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发表时间:
2011
期刊:
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通讯作者:
T. Savolainen
T. Savolainen
中科院分区:
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文献类型:
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作者:
T. Hovatta;M. Lister;M. Aller;H. Aller;D. Homan;Y. Kovalev;A. Pushkarev;T. Savolainen

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对活动星系核的射电偏振观测可以揭示这些源的秒差距尺度喷流的磁场结构。我们观测了γ射线耀变体3C 273,这是我们利用甚长基线阵列进行的多频巡天的一部分,目的是研究大样本喷流中的法拉第旋转。我们的观测再次证实了3C 273的横向旋转测量梯度。第一次看到梯度过零,这是进一步的指示螺旋磁场和脊柱鞘结构的射流。我们认为,与以前的时代的差异是由于在我们的观测中被照亮的喷流的不同部分。
Radio polarimetric observations of Active Galactic Nuclei can reveal the magnetic field structure in the parsec-scale jets of these sources. We have observed the γ-ray blazar 3C 273 as part of our multi-frequency survey with the Very Long Baseline Array to study Faraday rotation in a large sample of jets. Our observations re-confirm the transverse rotation measure gradient in 3C 273. For the first time the gradient is seen to cross zero which is further indication for a helical magnetic field and spine-sheath structure in the jet. We believe the difference to previous epochs is due to a different part of the jet being illuminated in our observations.