Radio jets in NGC 1068 with e -MERLIN and VLA: structure and morphology
Radio jets in NGC 1068 with e -MERLIN and VLA: structure and morphology
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NGC 1068 中带有 e-MERLIN 和 VLA 的射电喷流：结构和形态
DOI：
10.1093/mnras/stad3864
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发表时间：
2024
影响因子：
4.8
通讯作者：
Mutie I
中科院分区：
文献类型：
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作者：
Mutie I
我们展示了原型 Seyfert 2 星系 NGC 1068 在 5 GHz、10 GHz 和 21 GHz 下的新高灵敏度 e-MERLIN 和甚大阵列 (VLA) 射电图像。我们对射电喷流进行了成像，从东北 (NE)、C、S1 和 S2 的致密成分到 NE 和西南 (SW) 喷流瓣的微弱双瓣喷流结构。我们首次通过结合增强型多元无线电链接干涉仪网络（e-MERLIN）和 VLA 数据，在 15 kλ 和 3300 kλ 空间尺度之间绘制了喷流图。元件 NE、C 和 S2 具有陡峭的光谱，表明在 5 GHz 和 21 GHz 之间光学薄非热发射占主导地位。 S1 部分是活跃星系核所在的位置，具有平坦的无线电频谱。我们报告了一个新组件 S2a，它是南方喷气式飞机的一部分。我们将这些新数据与 1983 年、1992 年和 1995 年观察到的 MERLIN 和 VLA 数据进行比较，并报告组分 C 的通量减少了 2 倍，表明该射流组分的可变性。利用高角分辨率 e-MERLIN 图，我们检测到 NE 喷射波瓣中的弓形激波，这与 ALMA 观测到的分子气体流出一致。 NE 射流瓣的射流功率为 6.7 × 1042erg s−1，被认为负责驱除 ALMA 在同一区域周围观察到的稠密分子气体。
We present new high-sensitivitye-MERLIN and Very Large Array (VLA) radio images of the prototypical Seyfert 2 galaxy NGC 1068 at 5, 10, and 21 GHz. We image the radio jet, from the compact components north-east (NE), C, S1, and S2 to the faint double-lobed jet structure of the NE and south-west (SW) jet lobes. We map the jet between 15 kλ and 3300 kλ spatial scales by combiningenhanced-Multi Element Radio Linked Interferometer Network (e-MERLIN) and VLA data for the first time. Components NE, C, and S2 have steep spectra indicative of optically thin non-thermal emission domination between 5 and 21 GHz. Component S1, which is where the active galactic nucleus resides, has a flat radio spectrum. We report a new component, S2a, a part of the southern jet. We compare these new data with the MERLIN and VLA data observed in 1983, 1992, and 1995 and report a flux decrease by a factor of 2 in component C, suggesting variability of this jet component. With the high angular resolutione-MERLIN maps, we detect the bow shocks in the NE jet lobe that coincide with the molecular gas outflows observed with ALMA. The NE jet lobe has a jet power of6.7 × 1042erg s−1and is considered to be responsible for driving out the dense molecular gas observed with ALMA around the same region.