MAGNETOHYDRODYNAMIC SIMULATIONS OF A JET DRILLING AN HI CLOUD: SHOCK INDUCED FORMATION OF MOLECULAR CLOUDS AND JET BREAKUP
文献类型：期刊论文
| 作者 | Asahina, Yuta1; Ogawa, Takayuki1; Kawashima, Tomohisa2; Furukawa, Naoko3; Enokiya, Rei3; Yamamoto, Hiroaki3; Fukui, Yasuo3; Matsumoto, Ryoji1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-07-01 |
| 卷号 | 789期号:1页码:1 |
| 关键词 | ISM: clouds ISM: jets and outflows magnetohydrodynamics (MHD) shock waves stars: individual (SS433) |
| 英文摘要 | The formation mechanism of the jet-aligned CO clouds found by NANTEN CO observations is studied by magnetohydrodynamical (MHD) simulations taking into account the cooling of the interstellar medium. Motivated by the association of the CO clouds with the enhancement of Hi gas density, we carried out MHD simulations of the propagation of a supersonic jet injected into the dense Hi gas. We found that the Hi gas compressed by the bow shock ahead of the jet is cooled down by growth of the cooling instability triggered by the density enhancement. As a result, a cold dense sheath is formed around the interface between the jet and the Hi gas. The radial speed of the cold, dense gas in the sheath is a few km s(-1) almost independent of the jet speed. Molecular clouds can be formed in this region. Since the dense sheath wrapping the jet reflects waves generated in the cocoon, the jet is strongly perturbed by the vortices of the warm gas in the cocoon, which breaks up the jet and forms a secondary shock in the Hi-cavity drilled by the jet. The particle acceleration at the shock can be the origin of radio and X-ray filaments observed near the eastern edge of the W50 nebula surrounding the galactic jet source SS433. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HERBIG-HARO OBJECTS ; YOUNG STELLAR OBJECTS ; HIGH-RESOLUTION RADIO ; X-RAY-SPECTRUM ; NUMERICAL SIMULATIONS ; INTERSTELLAR-MEDIUM ; MAGNETIZED JETS ; SS 433 ; PROTOSTELLAR JETS ; SS-433 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000338103400079 |
| 源URL | [http://119.78.226.72/handle/331011/18183]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chiba Univ, Grad Sch Sci, Dept Phys, Inage Ku, Chiba 2638522, Japan 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan |
| 推荐引用方式 GB/T 7714 | Asahina, Yuta,Ogawa, Takayuki,Kawashima, Tomohisa,et al. MAGNETOHYDRODYNAMIC SIMULATIONS OF A JET DRILLING AN HI CLOUD: SHOCK INDUCED FORMATION OF MOLECULAR CLOUDS AND JET BREAKUP[J]. ASTROPHYSICAL JOURNAL,2014,789(1):1. |
| APA | Asahina, Yuta.,Ogawa, Takayuki.,Kawashima, Tomohisa.,Furukawa, Naoko.,Enokiya, Rei.,...&Matsumoto, Ryoji.(2014).MAGNETOHYDRODYNAMIC SIMULATIONS OF A JET DRILLING AN HI CLOUD: SHOCK INDUCED FORMATION OF MOLECULAR CLOUDS AND JET BREAKUP.ASTROPHYSICAL JOURNAL,789(1),1. |
| MLA | Asahina, Yuta,et al."MAGNETOHYDRODYNAMIC SIMULATIONS OF A JET DRILLING AN HI CLOUD: SHOCK INDUCED FORMATION OF MOLECULAR CLOUDS AND JET BREAKUP".ASTROPHYSICAL JOURNAL 789.1(2014):1. |
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来源：上海天文台
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