史蒂文森2-18
外观
(重定向自Stephenson 2-18)
觀測資料 曆元 J2000 | |
---|---|
星座 | 盾牌座 |
星官 | |
赤經 | 18h 39m 02.3709s[1] |
赤緯 | -06° 05′ 10.5357″[1] |
視星等(V) | |
特性 | |
演化阶段 | 紅超巨星 |
光谱分类 | ~M6[2] |
视星等 (G) | ±0.0092 15.2631[1] |
视星等 (J) | 7.150[3] |
视星等 (H) | 4.698[3] |
视星等 (K) | 2.9[3] |
天体测定 | |
自行 (μ) | 赤经:±0.511 −3.045[1] mas/yr 赤纬:±0.480 −5.950[1] mas/yr |
视差 (π) | −0.0081 ± 0.3120[1] mas |
距离 | 18,900[4] ly (5,800[4] pc) |
詳細資料 | |
半徑 | 2,150[5][a] R☉ |
亮度 | 437,000[5] (90,000[6] – 630,000[4][b]) L☉ |
溫度 | 3,200[5] K |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
史蒂文森2-18(英语:Stephenson 2-18)是位于盾牌座方向的一个紅特超巨星。距離地球大約20,000光年,在斯蒂芬森2 疏散星團視線方向。[7].
觀測數據
[编辑]![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Size_Comparison_of_St2-18%2C_VY_CMa_and_UY_Sct.jpg/220px-Size_Comparison_of_St2-18%2C_VY_CMa_and_UY_Sct.jpg)
它是目前已知体积最大的恆星。其測量的半徑是我們的太陽半徑的2158倍 [5]. 估計有效溫度為3,200克爾文,光度為440,000 太陽光度。 [5].
參見
[编辑]註釋
[编辑]參考文獻
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365
. doi:10.1051/0004-6361/201833051. VizieR中此天体在盖亚望远镜第二批数据发布的记录
- ^ Negueruela, I.; González-Fernández, C.; Dorda, R.; Marco, A.; Clark, J. S. The population of M-type supergiants in the starburst cluster Stephenson 2. Eas Publications Series. 2013, 60: 279. Bibcode:2013EAS....60..279N. arXiv:1303.1837
. doi:10.1051/eas/1360032.
- ^ 3.0 3.1 3.2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C. 2003, 2246: 0. Bibcode:2003yCat.2246....0C.
- ^ 4.0 4.1 4.2 Humphreys, Roberta M.; Helmel, Greta; Jones, Terry J.; Gordon, Michael S. Exploring the Mass Loss Histories of the Red Supergiants. The Astronomical Journal. 2020, 160 (3): 145. Bibcode:2020AJ....160..145H. arXiv:2008.01108
. doi:10.3847/1538-3881/abab15.
- ^ 5.0 5.1 5.2 5.3 5.4 Fok, Thomas K. T; Nakashima, Jun-ichi; Yung, Bosco H. K; Hsia, Chih-Hao; Deguchi, Shuji. Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters. The Astrophysical Journal. 2012, 760 (1): 65. Bibcode:2012ApJ...760...65F. arXiv:1209.6427
. doi:10.1088/0004-637X/760/1/65.
- ^ Deguchi, Shuji; Nakashima, Jun-Ichi; Zhang, Yong; Chong, Selina S. N.; Koike, Kazutaka; Kwok, Sun. SiO and H2O Maser Observations of Red Supergiants in Star Clusters Embedded in the Galactic Disk. Publications of the Astronomical Society of Japan. 2010, 62 (2): 391–407. Bibcode:2010PASJ...62..391D. arXiv:1002.2492
. doi:10.1093/pasj/62.2.391.
- ^ Davies, B.; Figer, D. F.; Kudritzki, R. P.; MacKenty, J.; Najarro, F.; Herrero, A. A Massive Cluster of Red Supergiants at the Base of the Scutum‐Crux Arm. The Astrophysical Journal. 2007, 671 (1): 781–801. Bibcode:2007ApJ...671..781D. arXiv:0708.0821
. doi:10.1086/522224.
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