论文标题

类星体反馈调查:揭示喷气机,风与排放线气体在2型类型中与无线电极化的相互作用

The Quasar Feedback Survey: Revealing the Interplay of Jets, Winds & Emission Line Gas in Type 2 Quasars with Radio Polarization

论文作者

Sasikumar, Silpa, Kharb, P., Harrison, C. M., Girdhar, A., Mukherjee, D., Mainieri, V., Jarvis, M. E.

论文摘要

我们介绍了$ z <0.2 $的五型2种类星体的联合无线电偏振和发射线研究的结果,而Karl G. Jansky非常大的阵列(VLA)B-array在5 GHz和Hubble Space望远镜(HST)[O III]观察结果。已知这五个来源在无线电结构与电离气体形态和运动学之间表现出密切的关联。四个来源(J0945+1737,J1000+1242,J1356+1026和J1430+1339)在当前数据中显示了极化。 J1010+1413是我们样品中的非极化源。我们在无线电内核中检测到$ 0.5-1 \%$的分数两极分化,并在这些来源的裂片中检测到高分位极化($ 10-30 \%$)。形态,光谱和极化特性表明,J0945+1737,J1000+1242,J1010+1413和J1430+1339中无线电发射的喷射起源,而当前数据无法完全识别Radio发射(JET或WIND)在J1356+1026中的起源(JET或WIND)。在我们的来源中观察到无线电和[O III]发射的各个极化结之间的抗相关性,类似于文献中某些无线电大通AGN中观察到的。这表明无线电发射可能会被发射线气体去极化。通过对去极化效应进行建模,我们估计排放线气体云的大小为$ \ sim(2.8 \ pm1.7)\ times10^{ - 5} $ parsec和与synchrorron plasma混合的热材料量,为$ \ sim(1.01 \ pm0.08)$ \ times10110^$ od od od od od od J0945+1737(在其叶中表现出最突出的极化标志)。当前的工作表明,喷气机/风和发射线气体的相互作用很可能导致无线电广播AGN中无线电流出的性质。

We present results from a combined radio polarization and emission line study of five type 2 quasars at $z<0.2$ with the Karl G. Jansky Very Large Array (VLA) B-array at 5 GHz and Hubble Space Telescope (HST) [O III] observations. These five sources are known to exhibit close association between radio structures and ionized gas morphology and kinematics. Four sources (J0945+1737, J1000+1242, J1356+1026 and J1430+1339) show polarization in the current data. J1010+1413 is the unpolarized source in our sample. We detect $0.5-1\%$ fractional polarization in the radio cores and a high fractional polarization ($10-30\%$) in the lobes of these sources. The morphological, spectral and polarization properties suggest a jet origin for radio emission in J0945+1737, J1000+1242, J1010+1413 and J1430+1339 whereas the current data cannot fully discern the origin of radio emission (jet or wind) in J1356+1026. An anti-correlation between various polarized knots in the radio and [O III] emission is observed in our sources, similar to that observed in some radio-loud AGN in the literature. This suggests that the radio emission is likely to be depolarized by the emission-line gas. By modeling the depolarization effects, we estimate the size of the emission-line gas clouds to be $\sim(2.8\pm1.7)\times10^{-5}$ parsec and the amount of thermal material mixed with the synchrotron plasma to be $\sim(1.01\pm0.08)\times10^{6}$M$_\odot$ in the lobe of J0945+1737 (which exhibits the most prominent polarization signature in its lobe). The current work demonstrates that the interplay of jets/winds and emission-line gas is most likely responsible for the nature of radio outflows in radio-quiet AGN.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源