天牢六
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 大熊座 |
| 星官 | 天牢（紫微垣） |
| 赤经 | 11h 22m 49.58373s[1] |
| 赤纬 | +43° 28′ 57.7267″[1] |
| 视星等（V） | 5.03[2] |
| 特性 | |
| 光谱分类 | G7IIIBa0.3[3] |
| U−B 色指数 | +0.82[4] |
| B−V 色指数 | +1.02[4] |
| 天体测定 | |
| 径向速度 (Rv) | 1.01 ± 0.05[5] km/s |
| 自行 (μ) | 赤经：-37.42[1] mas/yr 赤纬：-14.26[1] mas/yr |
| 视差 (π) | 6.12 ± 0.27[1] mas |
| 距离 | 530 ± 20 ly (163 ± 7 pc) |
| 轨道[6] | |
| 绕行周期 (P) | 16911+438 −401 d |
| 半长轴 (a) | 22.9+1.0 −1.1 au |
| 偏心率 (e) | 0.562+0.012 −0.012 |
| 倾斜角 (i) | 68+3.6 −3.4° |
| 升交点黄经 (Ω) | 60+3 −3° |
| 近心点 历元 (T) | 2468401+432 −385 |
| 近心点幅角 (ω) (secondary) | 286+2.3 −2.3° |
| 详细资料 [6] | |
| 56 UMa A | |
| 质量 | 4.3 ± 0.2 M☉ |
| 表面重力 (log g) | 2.3 ± 0.6 |
| 温度 | 4917 ± 34 K |
| 56 UMa B | |
| 质量 | 1.31+0.11 −0.12 M☉ |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
天牢六（56 UMa）是在大熊座的一颗恒星，视星等5.03[2]。它是一颗单线光谱联星，轨道周期约为45年[5]。它的伴星很可能是一颗大约在10万年前爆炸的超新星产生的大质量中子星[6]。
参考资料
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664 [2023-04-07]. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357. （原始内容存档于2016-04-02）.
- ^ 2.0 2.1 Ducati, J. R. VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system. CDS/ADC Collection of Electronic Catalogues. 2002, 2237. Bibcode:2002yCat.2237....0D.
- ^ Lu, Phillip K. Taxonomy of barium stars. Astronomical Journal. 1991, 101: 2229–2254. Bibcode:1991AJ....101.2229L. doi:10.1086/115845.
- ^ 4.0 4.1 Fernie, J. D. New UBVRI photometry for 900 supergiants. Astrophysical Journal Supplement Series. 1983, 52 (7–22): 7. Bibcode:1983ApJS...52....7F. doi:10.1086/190856.
- ^ 5.0 5.1 Pourbaix, D.; et al. SB9: The ninth catalogue of spectroscopic binary orbits. Astronomy and Astrophysics. 2004, 424 (2): 727–732. Bibcode:2004A&A...424..727P. S2CID 119387088. arXiv:astro-ph/0406573 . doi:10.1051/0004-6361:20041213.
- ^ 6.0 6.1 6.2 Escorza, A.; Karinkuzhi, D.; Jorissen, A.; Van Eck, S.; Schmelz, J. T.; Verschuur, G. L.; Boffin, H. M. J.; De Rosa, R. J.; Van Winckel, H. A neutron star candidate in the long-period binary 56 UMa. Astronomy and Astrophysics. 2023, 670: L14. Bibcode:2023A&A...670L..14E. S2CID 255941814. arXiv:2301.06531 . doi:10.1051/0004-6361/202245796.
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