天弁一
外观
觀測資料 曆元 J2000 | |
---|---|
星座 | 盾牌座 |
星官 | 天弁(斗宿) |
赤經 | 18h 35m 12.42776s[1] |
赤緯 | -8° 14′ 38.6529″[1] |
視星等(V) | 3.83[2] |
特性 | |
光谱分类 | K3III[3] |
U−B 色指数 | +1.53[2] |
B−V 色指数 | +1.34[2] |
天体测定 | |
徑向速度 (Rv) | +36.50[4] km/s |
自行 (μ) | 赤经:−17.00[1] mas/yr 赤纬:−313.52[1] mas/yr |
视差 (π) | 16.38 ± 0.22[1] mas |
距离 | 199 ± 3 ly (61.1 ± 0.8 pc) |
绝对星等 (MV) | −0.08[5] |
詳細資料 | |
質量 | 1.33[6] M☉ |
半徑 | 20[6] R☉ |
表面重力 (log g) | 1.96[6] |
亮度 | 186[5] L☉ |
溫度 | 4,315[7] K |
金属量 [Fe/H] | −0.04[5] dex |
自轉速度 (v sin i) | 1.7[8] km/s |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
天弁一,英文名稱(Alpha Scuti)源自拉丁文的α Scuti,是位於南天星座盾牌座的一顆橙色恆星。它最初是天鷹座的一部分,被稱為"天鷹座1"[9]。其視星等為3.83,是肉眼可見的恆星[2]。根據從地球上看到的16.38mas的年周視差[1],它位於距離太陽約199光年的地方。它正在以+36.5km/s的徑向速度遠離太陽[4]。
性質
[编辑]恆星分類為K3 III[3]的恆星光譜表明它已經演化成K型的巨星。天弁一是一顆可疑的變星,其星等範圍報告為3.81至3.87[10]。估計這顆恒星的質量是太陽質量的1.33倍,但外層已擴展到太陽半徑的20倍[6]。其膨脹的光球,表面的有效溫度為4,315K[7],正在輻射的光度是太陽光度的186倍[5]。
參考資料
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 1.5 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. Vizier catalog entry (页面存档备份,存于互联网档案馆)
- ^ 2.0 2.1 2.2 2.3 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.
- ^ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. The Perkins catalog of revised MK types for the cooler stars. The Astrophysical Journal Supplement Series. 1989, 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ^ 4.0 4.1 Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey. Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity. The Astronomical Journal. 2008, 135: 209–231. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209
.
- ^ 5.0 5.1 5.2 5.3 Anderson, E.; Francis, Ch. XHIP: An extended hipparcos compilation. Astronomy Letters. 2012, 38 (5): 331. Bibcode:2012AstL...38..331A. S2CID 119257644. arXiv:1108.4971
. doi:10.1134/S1063773712050015. Vizier catalog entry (页面存档备份,存于互联网档案馆)
- ^ 6.0 6.1 6.2 6.3 Allende Prieto, C.; Lambert, D. L. Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures. Astronomy and Astrophysics. 1999, 352: 555–562. Bibcode:1999A&A...352..555A. arXiv:astro-ph/9911002
. Vizier catalog entry (页面存档备份,存于互联网档案馆)
- ^ 7.0 7.1 Martínez, M. Isabel Pérez; Schröder, K.-P.; Cuntz, M. The basal chromospheric Mg ii h+k flux of evolved stars: Probing the energy dissipation of giant chromospheres. Monthly Notices of the Royal Astronomical Society. 2011, 414: 418. Bibcode:2011MNRAS.414..418P. S2CID 59268230. arXiv:1102.4832
. doi:10.1111/j.1365-2966.2011.18421.x. Vizier catalog entry (页面存档备份,存于互联网档案馆)
- ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. A catalog of rotational and radial velocities for evolved stars. Astronomy & Astrophysics. 2014, 561: A126. Bibcode:2014A&A...561A.126D. S2CID 54046583. arXiv:1312.3474
. doi:10.1051/0004-6361/201220762. Vizier catalog entry (页面存档备份,存于互联网档案馆)
- ^ Wagman, M. Flamsteed's Missing Stars. Journal for the History of Astronomy. August 1987, 18 (3): 212. Bibcode:1987JHA....18..209W. S2CID 118445625. doi:10.1177/002182868701800305.
- ^ Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1. Bibcode:2009yCat....102025S.
外部連結
[编辑]- EAAS: Scutum (页面存档备份,存于互联网档案馆)
- Kaler, James B., Alpha Scuti, STARS (University of Illinois), April 29, 2011 [2017-11-09], (原始内容存档于2022-08-07).
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