Young stars as tracers of a barred-spiral Milky Way
文献类型：期刊论文
| 作者 | Pettitt, Alex R.1; Ragan, Sarah E.2; Smith, Martin C.3 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2020 |
| 卷号 | 491期号:2页码:2162-2179 |
| 关键词 | hydrodynamics ISM: structure Galaxy: kinematics and dynamics Galaxy: structure galaxies: spiral |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stz3155 |
| 英文摘要 | Identifying the structure of our Galaxy has always been fraught with difficulties, and while modern surveys continue to make progress building a map of the Milky Way, there is still much to understand. The arm and bar features are important drivers in shaping the interstellar medium (ISM), but their exact nature and influence still require attention. We present results of smoothed particle hydrodynamic simulations of gas in the Milky Way including star formation, stellar feedback, and ISM cooling, when exposed to different arm and bar features, with the aim of better understanding how well newly formed stars trace out the underlying structure of the Galaxy. The bar is given a faster pattern speed than the arms, resulting in a complex, time-dependent morphology and star formation. Interarm branches and spurs are easily influenced by the bar, especially in the two-armed spiral models where there is a wide region of resonance overlap in the disc. As the bar overtakes the spiral arms it induces small boosts in star formation and enhances spiral features, which occur at regularly spaced beat-like intervals. The locations of star formation events are similar to those seen in observational data, and do not show a perfect 1:1 correspondence with the underlying spiral potential, though arm tangencies are generally well traced by young stars. Stellar velocity fields from the newly formed stars are compared to data from Gaia DR2, showing that the spiral and bar features can reproduce many of the non-axisymmetric features seen in the data. A simple analytical model is used to show many of these feature are a natural response of gas to rigidly rotating spiral and bar potentials. |
| WOS关键词 | RECONSTRUCTING CO MAPS ; MOLECULAR CLOUDS ; PATTERN SPEED ; GAS-DYNAMICS ; PHYSICAL-PROPERTIES ; INTERSTELLAR-MEDIUM ; SUPERNOVA FEEDBACK ; DISC GALAXIES ; DENSITY WAVES ; GALAH SURVEY |
| 资助项目 | National Key Basic Research and Development Program of China[2018YFA0404501] ; NSFC[11673083] ; Heising-Simons Foundation ; National Science Foundation[NSF PHY1748958] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000512302100048 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Heising-Simons Foundation ; Heising-Simons Foundation ; National Science Foundation ; National Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Heising-Simons Foundation ; Heising-Simons Foundation ; National Science Foundation ; National Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Heising-Simons Foundation ; Heising-Simons Foundation ; National Science Foundation ; National Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; Heising-Simons Foundation ; Heising-Simons Foundation ; National Science Foundation ; National Science Foundation |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/54016]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Pettitt, Alex R. |
| 作者单位 | 1.Hokkaido Univ, Fac Sci, Dept Phys, Sapporo, Hokkaido 0600810, Japan 2.Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, Wales 3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pettitt, Alex R.,Ragan, Sarah E.,Smith, Martin C.. Young stars as tracers of a barred-spiral Milky Way[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(2):2162-2179. |
| APA | Pettitt, Alex R.,Ragan, Sarah E.,&Smith, Martin C..(2020).Young stars as tracers of a barred-spiral Milky Way.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(2),2162-2179. |
| MLA | Pettitt, Alex R.,et al."Young stars as tracers of a barred-spiral Milky Way".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.2(2020):2162-2179. |
入库方式： OAI收割
来源：国家天文台
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