鳖六(α CrA/南冕座α),是南冕座的最亮恒星,视星等为4.10。它是一个类似织女星的A型星,自转非常快,接近崩裂速度。
特性
鳖六的恒星分类为A1V,[5]距离地球大约125光年。该星的质量估计为2.1倍太阳,半径2.2倍太阳。表面温度大约9,100K,辐射出30倍太阳光度。[5] 该星的年龄为2.54亿年。[2] 它是一个自转快速的恒星,赤道的速度接近200km/s,自转一周大约14小时。[6] 像织女星,它有红外线超量,代表它可能被尘埃盘环绕。[5]
参考资料
- ^ 1.0 1.1 1.2 van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. November 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Song, Inseok; et al, Ages of A-Type Vega-like Stars from uvbyβ Photometry, The Astrophysical Journal, February 2001, 546 (1): 352–357, Bibcode:2001ApJ...546..352S, arXiv:astro-ph/0010102 , doi:10.1086/318269
- ^ 3.0 3.1 3.2 3.3 3.4 3.5 SIMBAD query result:alf CrA -- Star. Centre de Données astronomiques de Strasbourg. [2012-09-02]. (原始内容存档于2013-04-22).
- ^ α Coronae Australis (star). Wolfram Alpha. [2012-09-02]. (原始内容存档于2013-04-22).
- ^ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Kaler, James B. ALFECCA MERIDIANA (Alpha Coronae Australis). Stars. University of Illinois. [2012-09-02]. (原始内容存档于2019-11-17).
- ^ 6.0 6.1 Royer, F.; Zorec, J.; Gómez, A. E. Rotational velocities of A-type stars. III. Velocity distributions. Astronomy and Astrophysics. February 2007, 463 (2): 671–682. Bibcode:2007A&A...463..671R. arXiv:astro-ph/0610785 . doi:10.1051/0004-6361:20065224.