巨爵座β(β Crt,翼宿十六,Al Sharasif),是位於巨爵座南部的一個雙星系統。它在夜空中肉眼可見,視星等為4.46[2]。 從地球上測量的恆星視差為9.59毫角秒,因此巨爵座β與太陽的距離約為340光年。

巨爵座β
巨爵座β位於天球的位置
觀測資料
曆元 J2000.0
星座 巨爵座
星官
赤經 11h 11m 39.48783s[1]
赤緯 −22° 49′ 33.0593″[1]
視星等(V) 4.46[2] (4.61 + 13.40)[3]
特性
光譜分類A2 III[3] + DA1.4[3]
U−B 色指數+0.05[2]
B−V 色指數+0.02[2]
天體測定
徑向速度 (Rv)+5.6±0.5[4] km/s
自行 (μ) 赤經:+2.52[1] mas/yr
赤緯:−100.22[1] mas/yr
視差 (π)9.59 ± 0.66[1] mas
距離340 ± 20 ly
(104 ± 7 pc)
絕對星等 (MV)−0.62[5] + 8.19[3]
詳細資料
表面重力 (log g)3.5[6]
亮度147[7] L
溫度8,830[7] K
自轉速度 (v sin i)49[8] km/s
β Crt B
質量0.43[9] M
半徑0.027[3] R
表面重力 (log g)7.40[10]
溫度36,885[10] K
其他命名
β Crt, 11 Crateris, BD−22° 3095, FK5 421, HD 97277, HIP 54682, HR 4343, SAO 179624, WD 1109-225.[11]
參考資料庫
SIMBAD資料

巨爵座β是一個天測聯星[3]系統,軌道周期約為6年,距離為8.3個天文單位。該軌道預計半長軸為9.3個天文單位[3]。 其主星A被列為一顆恆星光譜為A2 Ⅲ型的A型巨星[3][12][9] 不過Houk 和 Smith-Moore (1988) 把它列為A1 Ⅴ型主序星[13] 而Abt 和 Morrell (1995) 則把它列為一顆A2 Ⅳ型亞巨星[14]。 該系統的光譜顯示為增強,可能是因為其曾發生過傳質過程[6]

伴星B是一顆白矮星[9],有效溫度為36,885K,已經冷卻了約400萬年[10]。 它具有異常低的質量,只有太陽的43%,這表明這顆伴星可能已經將質量轉移給了主星。預測其將來可能轉化為一個三星系統 ,或者是一個高軌道離心率雙星系統[3]。 同時,這顆矮星是該系統X射線輻射的來源[15]

參考來源

編輯
  1. ^ 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): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV data (SIMBAD), 1986, Bibcode:1986EgUBV........0M. 
  3. ^ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Holberg, J. B.; et al, Where are all the Sirius-like binary systems?, Monthly Notices of the Royal Astronomical Society, 2013, 435 (3): 2077, Bibcode:2013MNRAS.435.2077H, arXiv:1307.8047 , doi:10.1093/mnras/stt1433. 
  4. ^ de Bruijne, J. H. J.; Eilers, A.-C., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, Astronomy & Astrophysics, October 2012, 546: 14, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61. 
  5. ^ 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. ^ 6.0 6.1 Smalley, B.; et al, The chemical composition and binarity of beta Crateris, Monthly Notices of the Royal Astronomical Society, January 1997, 284 (2): 457–464, Bibcode:1997MNRAS.284..457S, doi:10.1093/mnras/284.2.457. 
  7. ^ 7.0 7.1 McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037 , doi:10.1111/j.1365-2966.2012.21873.x. 
  8. ^ Royer, F.; et al, 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. 
  9. ^ 9.0 9.1 9.2 Burleigh, M. R.; et al, The low-mass white dwarf companion to β Crateris, Monthly Notices of the Royal Astronomical Society, November 2001, 327 (4): 1158–1164, Bibcode:2001MNRAS.327.1158B, arXiv:astro-ph/0106463 , doi:10.1046/j.1365-8711.2001.04818.x. 
  10. ^ 10.0 10.1 10.2 Barstow, M. A.; et al, Evidence for an external origin of heavy elements in hot DA white dwarfs, Monthly Notices of the Royal Astronomical Society, May 2014, 440 (2): 1607–1625, Bibcode:2014MNRAS.440.1607B, arXiv:1402.2164 , doi:10.1093/mnras/stu216. 
  11. ^ bet Crt -- Spectroscopic binary, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2017-03-02], (原始內容存檔於2020-11-05). 
  12. ^ 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, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x. 
  13. ^ Houk, Nancy; Smith-Moore, M., Michigan catalogue of two-dimensional spectral types for the HD stars 4, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1988MSS...C04....0H. 
  14. ^ Abt, Helmut A.; Morrell, Nidia I., The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars, Astrophysical Journal Supplement, 1995, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182. 
  15. ^ Schröder, C.; Schmitt, J. H. M. M., X-ray emission from A-type stars, Astronomy and Astrophysics, November 2007, 475 (2): 677–684, Bibcode:2007A&A...475..677S, doi:10.1051/0004-6361:20077429. 

外部連結

編輯
  • Kaler, James B., Beta Crateris, Stars (University of Illinois), 2015-05-22 [2017-03-03], (原始內容存檔於2016-11-04).