天鹅座ω1
| 观测资料 历元 J2000.0 | |
|---|---|
| 星座 | 天鹅座 |
| 星官 | 天津（女宿） |
| 赤经 | 20h 30m 03.54116s[2] |
| 赤纬 | +48° 57′ 05.6446″[2] |
| 视星等（V） | +4.93 - 4.96[3] |
| 特性 | |
| 光谱分类 | B2.5 IV[4] |
| U−B 色指数 | −0.68[5] |
| B−V 色指数 | −0.09[5] |
| 变星类型 | 仙王座β[6] （波江座λ[3]） |
| 天体测定 | |
| 径向速度 (Rv) | −21.9±2.0[7] km/s |
| 自行 (μ) | 赤经：+10.883[8] mas/yr 赤纬：+7.057[8] mas/yr |
| 视差 (π) | 2.5878 ± 0.1637[8] mas |
| 距离 | 1,260 ± 80 ly (390 ± 20 pc) |
| 绝对星等 (MV) | −2.65[9] |
| 详细资料 | |
| 质量 | 8.1±0.2[4] M☉ |
| 半径 | 13.825[10] R☉ |
| 表面重力 (log g) | 2.312[10] |
| 亮度 | 1,549[11] L☉ |
| 温度 | 16,982[11] K |
| 金属量 [Fe/H] | 0.0[9] dex |
| 自转速度 (v sin i) | 145[12] km/s |
| 年龄 | 33.2±4.5[4] Myr |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
天鹅座ω1，来自拉丁化的ω1 Cygni，是独立的拜耳名称[14]，它是在北天星座天鹅座的一颗恒星；中文传统名称是天津增卅五。它的视星等为4.94[5]，以肉眼即可看见。基于2.59mas的周年视差偏移[8]，估计它与太阳的距离大约为1,260 光年。相对于它的邻居，这颗恒星的本动速度为25.7±2.2 km/s[7]。
这是一颗有点演化的B型次巨星，恒星分类为B2.5 IV[4]。Telting及其同事在2006年发表的一项高分辨率光谱学研究中指出，在其光谱中发现了规则的脉动，因此他们对此高度自信，它是一颗仙王座β型变星[6]。它的亮度每1.137天不规则地变化0.034星等[15]。
相关条目
[编辑]- 天津增卅四（天鹅座ω2）
参考资料
[编辑]- ^ MAST: Barbara A. Mikulski Archive for Space Telescopes. Space Telescope Science Institute. [27 November 2022]. （原始内容存档于2023-03-27）.
- ^ 2.0 2.1 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752
, doi:10.1051/0004-6361:20078357.
- ^ 3.0 3.1 V2014 Cygni, International Variable Star Index, [2020-09-02], （原始内容存档于2023-08-12）
- ^ 4.0 4.1 4.2 4.3 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.
- ^ 5.0 5.1 5.2 Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV Data (SIMBAD), 1986, Bibcode:1986EgUBV........0M.
- ^ 6.0 6.1 Telting, J. H.; et al, A high-resolution spectroscopy survey of β Cephei pulsations in bright stars, Astronomy and Astrophysics, June 2006, 452 (3): 945–953, Bibcode:2006A&A...452..945T, doi:10.1051/0004-6361:20054730 .
- ^ 7.0 7.1 Bobylev, V. V.; Bajkova, A. T., Galactic kinematics from a sample of young massive stars, Astronomy Letters, August 2013, 39 (8): 532–549, Bibcode:2013AstL...39..532B, S2CID 118568203, arXiv:1307.1677 , doi:10.1134/S106377371308001X.
- ^ 8.0 8.1 8.2 8.3 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
- ^ 9.0 9.1 Gontcharov, G. A., Dependence of kinematics on the age of stars in the solar neighborhood, Astronomy Letters, 2012, 38 (12): 771–782, Bibcode:2012AstL...38..771G, S2CID 118345778, arXiv:1606.08814 , doi:10.1134/S1063773712120031.
- ^ 10.0 10.1 McDonald, I.; Zijlstra, A. A.; Watson, R. A., Fundamental parameters and infrared excesses of Tycho–Gaia stars, Monthly Notices of the Royal Astronomical Society, 2017, 471 (1): 770–791, Bibcode:2017MNRAS.471..770M, S2CID 73594365, arXiv:1706.02208 , doi:10.1093/mnras/stx1433.
- ^ 11.0 11.1 Simón-Díaz, S.; Godart, M.; Castro, N.; Herrero, A.; Aerts, C.; Puls, J.; Telting, J.; Grassitelli, L., The IACOB project . III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars, Astronomy and Astrophysics, 2017, 597: A22, Bibcode:2017A&A...597A..22S, S2CID 3478126, arXiv:1608.05508 , doi:10.1051/0004-6361/201628541.
- ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica, Rotational Velocities of B Stars, The Astrophysical Journal, July 2002, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590 .
- ^ * ome01 Cyg -- Pulsating variable Star. SIMBAD. 斯特拉斯堡天文资料中心.
- ^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- ^ Lefèvre, L.; et al, A systematic study of variability among OB-stars based on HIPPARCOS photometry, Astronomy and Astrophysics, 2009, 507 (2): 1141, Bibcode:2009A&A...507.1141L, doi:10.1051/0004-6361/200912304 .
