船帆座AH
（重定向自HD 68808）
船帆座AH是在船帆座的一颗黄白色调单星[11]。它的平均视星等为5.70等[2]，这使得必须在良好的观测条件下，才能用裸眼隐约看到它。从它的周年视差 1.217 mas[1]估计，它的距离大约是2,700光年。它正以每秒 +26公里的日心径向速度朝向地球移动[7]。
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 船帆座 |
| 星官 | |
| 赤经 | 08h 11m 59.96702s[1] |
| 赤纬 | -46° 38′ 39.6561″[1] |
| 视星等（V） | 5.70[2] (5.50 – 5.89)[3] |
| 特性 | |
| 光谱分类 | F7 Ib-II[4] |
| U−B 色指数 | 0.39[5] |
| B−V 色指数 | 0.59[6] |
| R−I 色指数 | [5] |
| 变星类型 | 仙王座δ[3] |
| 天体测定 | |
| 径向速度 (Rv) | +26.0±2.9[7] km/s |
| 自行 (μ) | 赤经：−4.405[1] mas/yr 赤纬：+6.768[1] mas/yr |
| 视差 (π) | 1.2170 ± 0.0570[1] mas |
| 距离 | 2,700 ± 100 ly (820 ± 40 pc) |
| 绝对星等 (MV) | −2.52[8] |
| 详细资料 | |
| 质量 | 7.0±0.5[9] M☉ |
| 表面重力 (log g) | 1.66[6] |
| 亮度 | 929.98[8] L☉ |
| 温度 | 6,102[6] K |
| 金属量 [Fe/H] | +0.09[6] dex |
| 自转速度 (v sin i) | 10.0±0.5[10] km/s |
| 年龄 | 50.0±11.0[9] Myr |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
它是颗光谱类型为F7Ib-II的亮巨星/超巨星 [12]，年龄大约5,000万年[9]，投影转动速度为每秒10公里[10]。它的质量为7太阳质量[9]，来自有效温度6,102K[6]的光球亮度是太阳的930倍[8]。
这颗经典造父变星[3]的视星等范围从5.50至5.89等，周期超过4.227171天[12]。它的第一泛音脉动有6.04天的基本周期[2]。
参考资料
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
- ^ 2.0 2.1 2.2 Evans, Nancy Remage; Bond, Howard E; Schaefer, Gail H; Mason, Brian D; Tingle, Evan; Karovska, Margarita; Pillitteri, Ignazio. Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids. The Astronomical Journal. 2016, 151 (5): 129. Bibcode:2016AJ....151..129E. arXiv:1603.02224 . doi:10.3847/0004-6256/151/5/129.
- ^ 3.0 3.1 3.2 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N. General catalogue of variable stars: Version GCVS 5.1. Astronomy Reports. 2017, 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
- ^ Houk, Nancy. Michigan catalogue of two-dimensional spectral types for the HD stars. Ann Arbor : Dept. Of Astronomy (Ann Arbor). 1978, 2. Bibcode:1978mcts.book.....H.
- ^ 5.0 5.1 5.2 HD 68808. SIMBAD. 斯特拉斯堡天文资料中心.
- ^ 6.0 6.1 6.2 6.3 6.4 Luck, R. Earle. Parameters and Abundances in Luminous Stars. The Astronomical Journal. 2014, 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137 .
- ^ 7.0 7.1 de Bruijne, J. H. J.; Eilers, A.-C. Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project. Astronomy & Astrophysics. October 2012, 546: 14. Bibcode:2012A&A...546A..61D. arXiv:1208.3048 . doi:10.1051/0004-6361/201219219. A61.
- ^ 8.0 8.1 8.2 Anderson, E.; Francis, Ch. XHIP: An extended hipparcos compilation. Astronomy Letters. 2012, 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 . doi:10.1134/S1063773712050015.
- ^ 9.0 9.1 9.2 9.3 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, January 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x
- ^ 10.0 10.1 Ammler-von Eiff, M.; Reiners, A. New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?. Astronomy & Astrophysics. June 2012, 542: A116. Bibcode:2012A&A...542A.116A. arXiv:1204.2459 . doi:10.1051/0004-6361/201118724.
- ^ Eggleton, P. P.; Tokovinin, A. A. A catalogue of multiplicity among bright stellar systems. Monthly Notices of the Royal Astronomical Society. 2008, 389 (2): 869. Bibcode:2008MNRAS.389..869E. arXiv:0806.2878 . doi:10.1111/j.1365-2966.2008.13596.x.
- ^ 12.0 12.1 Watson, Christopher. AH Velorum. AAVSO Website. American Association of Variable Star Observers. 4 January 2010 [12 March 2014]. （原始内容存档于2020-08-10）.
