南十字座ζ
南十字座ζ是在南十字座南部的一顆聯星。它可以用肉眼直接看見，視星等為4.06m，距離太陽大約360光年。它是天蠍-半人馬星協的子集團，下天蠍-半人馬座星協的成員[10]。
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 南十字座 |
| 星官 | |
| 赤經 | 12h 18m 26.24772s[1] |
| 赤緯 | –64° 00′ 11.0528″[1] |
| 視星等（V） | 4.04[2] |
| 特性 | |
| 光譜分類 | B2.5V[3] |
| U−B 色指數 | –0.68[2] |
| B−V 色指數 | –0.17[2] |
| 天體測定 | |
| 徑向速度 (Rv) | +15.8[4] km/s |
| 自行 (μ) | 赤經：−33.80[1] mas/yr 赤緯：−10.15[1] mas/yr |
| 視差 (π) | 9.12 ± 0.45[1] mas |
| 距離 | 360 ± 20 ly (110 ± 5 pc) |
| 絕對星等 (MV) | −1.13[5] |
| 詳細資料 | |
| 質量 | 6.4±0.1[6] M☉ |
| 亮度 | 737[5] L☉ |
| 溫度 | 3,832[7] K |
| 自轉速度 (v sin i) | 115[8] km/s |
| 年齡 | 20.0±4.3[6] Myr |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
這是一顆雙譜的光譜聯星[11]。光譜與B型主序星匹配，恆星分類屬於B2.5V。它有一顆微弱的視覺伴星，視星等12.49[12]。
參考資料
- ^ 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. Bibcode:2007A&A...474..653V. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357. Vizier catalog entry （頁面存檔備份，存於網際網路檔案館）
- ^ 2.0 2.1 2.2 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ^ Hiltner, W. A.; Garrison, R. F.; Schild, R. E. MK Spectral Types for Bright Southern OB Stars. Astrophysical Journal. July 1969, 157: 313–326. Bibcode:1969ApJ...157..313H. doi:10.1086/150069.
- ^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (編). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966. Bibcode:1967IAUS...30...57E.
- ^ 5.0 5.1 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.
- ^ 6.0 6.1 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.
- ^ Gerbaldi, M.; Faraggiana, R.; Balin, N. Binary systems with post-T Tauri secondaries. Astronomy and Astrophysics. November 2001, 379: 162–184. Bibcode:2001A&A...379..162G. doi:10.1051/0004-6361:20011298.
- ^ Bernacca, P. L.; Perinotto, M. A catalogue of stellar rotational velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1): 1. Bibcode:1970CoAsi.239....1B.
- ^ zet Cru. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ Chen, Christine H.; et al, A Spitzer MIPS Study of 2.5-2.0 M⊙ Stars in Scorpius-Centaurus, The Astrophysical Journal, September 2012, 756 (2): 24, Bibcode:2012ApJ...756..133C, arXiv:1207.3415 , doi:10.1088/0004-637X/756/2/133, 133.
- ^ Chini, R.; et al, A spectroscopic survey on the multiplicity of high-mass stars, Monthly Notices of the Royal Astronomical Society, 2012, 424 (3): 1925, Bibcode:2012MNRAS.424.1925C, arXiv:1205.5238 , doi:10.1111/j.1365-2966.2012.21317.x.
- ^ Gahm, G. F.; Ahlin, P.; Lindroos, K. P. A study of visual double stars with early type primaries. I - Spectroscopic results. Astronomy and Astrophysics Supplement Series. January 1983, 51: 143–159. Bibcode:1983A&AS...51..143G.
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