西上將

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西上將
觀測資料
曆元 J2000
星座 狮子座
星官
赤經 11h 21m 08.1943s[1]
赤緯 +06° 01′ 45.558″[1]
視星等(V) 4.046[2]
特性
光谱分类 B9.5 Vs[3]
U−B 色指数 –0.12[4]
B−V 色指数 –0.06[4]
天体测定
径向速度 (Rv) –5.3[5] km/s
自行 (μ) 赤经:–91.76[1] mas/yr
赤纬:–12.83[1] mas/yr
视差 (π) 15.24 ± 0.81[1] mas
距离 210 ± 10 ly
(66 ± 3 pc)
绝对星等 (MV) −0.10[6]
詳細資料
質量 2.76[7] M
半徑 3.3[8] R
表面重力 (log g) 3.83±0.03[9]
亮度 133[6] L
溫度 10,250[8] K
金属量 [Fe/H] +0.0[8] dex
自轉速度 (v sin i) 70[10] km/s
年齡 293[7] Myr
其他命名
σ Leo77 LeoBD−06° 2437FK5 427、HD 98664、HIP 55434、HR 4386、SAO 118804[11]
參考資料庫
SIMBAD data

西上將σ Leo / 狮子座σ)也称太微右垣二,是狮子座的一颗蓝白恒星,在中国古代星官中属于太微垣太微右垣。它视星等为+4.05,是狮子座的第四亮星,光谱型B9.5V。

参考文献[编辑]

  1. ^ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C.; 等. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ Cousins, A. W. J., Standardisation of broad band photometry of equatorial standards, South Africa Astronomical Observatory Circular, 1984, 8: 59−67, Bibcode:1984SAAOC...8...59C. 
  3. ^ Chini, R.; 等, spectroscopic survey on the multiplicity of high-mass stars, Monthly Notices of the Royal Astronomical Society, August 2012, 424 (3): 1925−1929, Bibcode:2012MNRAS.424.1925C, arXiv:1205.5238, doi:10.1111/j.1365-2966.2012.21317.x 
  4. ^ 4.0 4.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J. 
  5. ^ Wilson, Ralph Elmer. General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. 1953. Bibcode:1953GCRV..C......0W. 
  6. ^ 6.0 6.1 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. 
  7. ^ 7.0 7.1 David, Trevor J.; Hillenbrand, Lynne A., The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets, The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, arXiv:1501.03154, doi:10.1088/0004-637X/804/2/146. 
  8. ^ 8.0 8.1 8.2 Lipski, Ł.; Stȩpień, K. Effective temperatures of magnetic chemically peculiar stars from full spectral energy distributions. Monthly Notices of the Royal Astronomical Society. March 2008, 385 (1): 481–492. Bibcode:2008MNRAS.385..481L. arXiv:0712.3664. doi:10.1111/j.1365-2966.2008.12856.x. 
  9. ^ Fitzpatrick, E. L.; Massa, D., Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry, The Astronomical Journal, March 2005, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, arXiv:astro-ph/0412542, doi:10.1086/427855 
  10. ^ Bernacca, P. L.; Perinotto, M. A catalogue of stellar rotational velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B. 
  11. ^ sig Leo -- Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-06-23].