壘壁陣八
外观
觀測資料 曆元 J2000 | |
---|---|
星座 | 寶瓶座 |
星官 | |
赤經 | 23h 14m 19.35965s[1] |
赤緯 | –06° 02′ 56.3986″[1] |
視星等(V) | +4.223[2] |
特性 | |
光谱分类 | M1.5 III[3] |
U−B 色指数 | +1.897[2] |
B−V 色指数 | +1.563[2] |
天体测定 | |
徑向速度 (Rv) | ±0.32 +2.48[4] km/s |
自行 (μ) | 赤经:+35.391[1] mas/yr 赤纬:–196.862[1] mas/yr |
视差 (π) | 14.6670 ± 0.4099[1] mas |
距离 | 222 ± 6 ly (68 ± 2 pc) |
绝对星等 (MV) | ±0.120 0.30[5] |
詳細資料 | |
質量 | ±0.03 1.00[6] M☉ |
半徑 | +1.83 −2.04 34.77[6] R☉ |
表面重力 (log g) | 1.5[4] |
亮度 | ±25.2 207.7[6] L☉ |
溫度 | ±48 3715[6] K |
自轉速度 (v sin i) | 6.7[4] km/s |
年齡 | ±0.83 10.97[6] Gyr |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
壘壁陣八(英語:Phi Aquarii,是源自拉丁化拜耳命名法名稱[8]。)是在天球赤道星座寶瓶座中的聯星系統。它的綜合視星等為+4.223,因此肉眼可見[2]。視差量測表明,它與地球的距離大致為 222光年(68秒差距)[1],並且它以+2.5km/s的徑向速度漂移得更遠[4]。它位於黃道以南1.05度,因此受到月掩星的影響,會被月球遮蔽[9]。
它是一個光譜聯星的恆星系統,估計週期為2,500天[10]。主星是一顆紅巨星,恆星分類為M1.5 III[3]。這顆恒星的質量與太陽相同,但其演化使外層已經膨脹到太陽的35倍大[6]。在3715K的表面有效溫度下,它的輻射亮度是太陽的208倍[6],使其具有M型恆星的紅色色調[11]。
參考資料
[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 2.3 Gutierrez-Moreno, Adelina; et al, A System of photometric standards, Publications of the Department of Astronomy University of Chile (Publicaciones Universidad de Chile, Department de Astronomy), 1966, 1: 1–17, Bibcode:1966PDAUC...1....1G.
- ^ 3.0 3.1 Morgan, W. W.; Keenan, P. C., Spectral Classification, Annual Review of Astronomy and Astrophysics, 1973, 11: 29, Bibcode:1973ARA&A..11...29M, doi:10.1146/annurev.aa.11.090173.000333.
- ^ 4.0 4.1 4.2 4.3 Massarotti, Alessandro; et al, Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity, The Astronomical Journal, January 2008, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209
.
- ^ Park, Sunkyung; et al, Wilson-Bappu Effect: Extended to Surface Gravity, The Astronomical Journal, 2013, 146 (4): 73, Bibcode:2013AJ....146...73P, S2CID 119187733, arXiv:1307.0592
, doi:10.1088/0004-6256/146/4/73.
- ^ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Baines, Ellyn K.; et al. Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer. The Astronomical Journal. 2018, 155 (1). 30. Bibcode:2018AJ....155...30B. S2CID 119427037. arXiv:1712.08109
. doi:10.3847/1538-3881/aa9d8b
.
- ^ [ 请检查
|url=
值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. * phi Aqr] - ^ 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.
- ^ White, Nathaniel M.; Feierman, Barry H., A Catalog of Stellar Angular Diameters Measured by Lunar Occultation, Astronomical Journal, September 1987, 94: 751, Bibcode:1987AJ.....94..751W, doi:10.1086/114513.
- ^ Famaey, B.; et al, Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations, Astronomy and Astrophysics, May 2009, 498 (2): 627–640, Bibcode:2009A&A...498..627F, S2CID 18739721, arXiv:0901.0934
, doi:10.1051/0004-6361/200810698.
- ^ The Colour of Stars, Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004 [2012-07-02], (原始内容存档于March 18, 2012).