Three-dimensional Magnetohydrodynamical Simulations of the Morphology of Head–Tail Radio Galaxies Based on the?Magnetic Tower Jet Model
文献类型：期刊论文
| 作者 | Gan,Zhaoming1; Li,Hui2; Li,Shengtai2; Yuan,Feng1 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2017-04-07 |
| 卷号 | 839期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: active galaxies: jets magnetohydrodynamics (MHD) methods: numerical |
| DOI | 10.3847/1538-4357/aa647e |
| 英文摘要 | Abstract The distinctive morphology of head–tail radio galaxies reveals strong interactions between the radio jets and their intra-cluster environment, the general consensus on the morphology origin of head–tail sources is that radio jets are bent by violent intra-cluster weather. We demonstrate in this paper that such strong interactions provide a great opportunity to study the jet properties and also the dynamics of the?intra-cluster medium (ICM). By three-dimensional magnetohydrodynamical simulations, we analyze the detailed bending process of a magnetically dominated jet, based on the magnetic tower jet model. We use stratified atmospheres modulated by wind/shock to mimic the violent intra-cluster weather. Core sloshing is found to be inevitable during the wind-cluster core interaction, which induces significant shear motion and could finally drive ICM turbulence around the jet, making it difficult for the?jet to survive. We perform a?detailed comparison between the behavior of pure hydrodynamical jets and the?magnetic tower jet?and find that the jet-lobe morphology could not survive against the violent disruption in all of our pure hydrodynamical jet models. On the other hand, the head–tail morphology is well reproduced by using a magnetic tower jet model bent by wind, in which hydrodynamical instabilities are naturally suppressed and the jet could always keep its integrity under the protection of its internal magnetic fields. Finally, we also check the possibility for jet bending by shock only. We find that shock could not bend the jet significantly, and thus?could not be expected to explain the observed long tails in head–tail radio galaxies. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-839-1-AA647E |
| 源URL | [http://119.78.226.72/handle/331011/32129]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China; zmgan@shao.ac.cn, fyuan@shao.ac.cn 2.Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA; hli@lanl.gov, sli@lanl.gov |
| 推荐引用方式 GB/T 7714 | Gan,Zhaoming,Li,Hui,Li,Shengtai,et al. Three-dimensional Magnetohydrodynamical Simulations of the Morphology of Head–Tail Radio Galaxies Based on the?Magnetic Tower Jet Model[J]. The Astrophysical Journal,2017,839(1). |
| APA | Gan,Zhaoming,Li,Hui,Li,Shengtai,&Yuan,Feng.(2017).Three-dimensional Magnetohydrodynamical Simulations of the Morphology of Head–Tail Radio Galaxies Based on the?Magnetic Tower Jet Model.The Astrophysical Journal,839(1). |
| MLA | Gan,Zhaoming,et al."Three-dimensional Magnetohydrodynamical Simulations of the Morphology of Head–Tail Radio Galaxies Based on the?Magnetic Tower Jet Model".The Astrophysical Journal 839.1(2017). |
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