On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way
文献类型：期刊论文
| 作者 | Bian,S. B.6,7; Wu,Y. W.5; Xu,Y.6,7; Reid,M. J.4; Li,J. J.7; Zhang,B.3; Menten,K. M.2; Moscadelli,L.1; Brunthaler,A.2 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2024-05-17 |
| 卷号 | 167期号:6 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ad4030 |
| 英文摘要 | Abstract We report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey. Distances for these sources are estimated from parallax measurements combined with three-dimensional kinematic distances. The distances of G033.64?00.22, G035.57?00.03, G041.15?00.20, and G043.89?00.78 are 9.9 ± 0.5, 10.2 ± 0.6, 7.6 ± 0.5, and 7.5 ± 0.3 kpc, respectively. Based on these measurements, we suggest that the Sagittarius arm segment beyond about 8 kpc from the Sun in the first Galactic quadrant should be adjusted radially outward relative to previous models. This supports the suggestion of Xu et al. that the Sagittarius and Perseus spiral arms might merge in the first quadrant before spiraling inward to the far end of the Galactic bar. |
| 语种 | 英语 |
| WOS记录号 | IOP:AJ_167_6_267 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://210.72.145.45/handle/361003/14595]  |
| 专题 | 国家授时中心_高精度时间传递与精密测定轨研究室 |
| 作者单位 | 1.INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy 2.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany 3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China 4.Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA 5.National Time Service Center, Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, People's Republic of China 6.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People's Republic of China 7.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033, People's Republic of China; xuye@pmo.ac.cn |
| 推荐引用方式 GB/T 7714 | Bian,S. B.,Wu,Y. W.,Xu,Y.,et al. On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way[J]. The Astronomical Journal,2024,167(6). |
| APA | Bian,S. B..,Wu,Y. W..,Xu,Y..,Reid,M. J..,Li,J. J..,...&Brunthaler,A..(2024).On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way.The Astronomical Journal,167(6). |
| MLA | Bian,S. B.,et al."On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way".The Astronomical Journal 167.6(2024). |
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