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首页> 外文期刊>Astronomy and astrophysics >The asymmetric radio structure and record jet of giant quasar 4C?34.47
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The asymmetric radio structure and record jet of giant quasar 4C?34.47

机译：巨型类星体4C？34.47的非​​对称无线电结构和记录射流

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Context. Unification models for active galactic nuclei, AGN, predict that all quasars (radio sources associated with quasi-stellar objects) should be at a substantial angle with the sky plane. Aims. We test the predictions of the orientation unification model with the morphological and polarization properties of a giant quasar. Methods. The giant double-lobed radio source 4C?34.47, which is associated with quasi-stellar object B1721+343, is mapped at arcsecond scale resolution, and the data are subsequently analyzed within the context of current models for extragalactic radio sources. Results. Quasar 4C?34.47 displays a straight one-sided jet, measuring a record length of 380?kpc in its double-lobed radio structure. Assuming an intrinsically symmetric two-sided jet structure the radio source jet axis must be at least 33° away from the sky plane, that is within 57° from the line of sight. The radio polarization properties indicate that this giant source has largely outgrown the depolarizing halo that is generally associated with the host galaxies of powerful radio sources. The measured small depolarization asymmetry nevertheless agrees with its inferred orientation. Conclusions. All data for this giant radio source agree with its preferred orientation as predicted within the unification scheme for powerful radio sources. Seen under a small aspect angle the radio source is large, but not excessively large. The global properties of 4C?34.47 do not differ from other giant (old) FR2 radio sources: it is a slowly expanding low-luminosity radio source.
机译：上下文。活跃银河核的统一模型AGN预测，所有类星体（与准星体相关的无线电源）都应与天空平面成一定角度。目的我们用巨型类星体的形态和极化特性测试了取向统一模型的预测。方法。与准星体B1721 + 343关联的巨型双瓣无线电源4C？34.47以弧秒尺度的分辨率进行了映射，随后在当前模型中对河外无线电源进行了数据分析。结果。 Quasar 4C？34.47显示了一个直的单边射流，其双瓣无线电结构的记录长度达到380？kpc。假定本征对称的两侧射流结构，则无线电源射流轴必须与天空平面至少相距33°，即与视线相距57°之内。无线电极化特性表明，这种巨大的辐射源已经大大超过了通常与强大无线电源的宿主星系相关联的去极化光晕。然而，所测得的小的去极化不对称性与其推断的方向一致。结论。此巨型无线电源的所有数据均与功能强大的无线电源统一方案中预测的首选方向一致。从小角度角度看，无线电源很大，但不会太大。 4C 34.47的全局特性与其他巨型（旧）FR2无线电源没有​​什么不同：它是一个缓慢扩展的低发光率无线电源。

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