半人馬座X-3

半人馬座X-3Centaurus X-3,縮寫為Cen X-3),(4U 1118-60)是X射線脈衝星,周期為4.84秒。 這是在半人馬座星座中被發現的第一個X射線脈衝星,也是第三個被發現的X射線源。該系統由一顆中子星繞着一個巨大的O型超巨星型恆星運行,該恆星被稱為克熱明斯基星(Krzeminski)的恆星,以其發現者波蘭的天文學家沃伊切赫·克熱明斯基英語Wojciech Krzemiński名字命名。物質從恆星被吸積到中子星上,導致X射線發射

Centaurus X-3
觀測資料
曆元 J2000
星座 半人馬座
星官
赤經 11h 21m 15.78s[1]
赤緯 –60° 37′ 22.7″[1]
視星等(V) 13.25[2]
特性
光譜分類O6-7 II-III[3]
變星類型Ellipsoidal[4] & eclipsing[5]
天體測定
距離18.6 ± 4.9 kly(5.7 ± 1.5 kpc[6] ly
詳細資料
克熱明斯基恆星
質量20.5 ± 0.7[6] M
半徑12[6] R
亮度316,000[4] L
溫度39,000[7] K
X-ray component
質量1.21 ± 0.21[6] M
其他命名
V779 Cen, 1RXS J112115.4-603725, 4U 1118-60, 美國變星觀測者協會 1116-60
參考資料庫
SIMBAD資料

歷史

半人馬座X-3位於半人馬座方向,是第一個發現具有X射線脈衝的X射線源,後被確認為一顆低質量X射線雙星。半人馬座X-3最早是在1967年發現的[8],1971年烏呼魯衛星觀測到它具有規則的脈衝,周期為4.84秒,同時每隔2.087天脈衝就中斷將近12個小時[9]。這表明它是一顆X射線雙星,X射線脈衝是由雙星系統中中子星發出的,同時因兩子星相互繞轉而發生周期性的掩食。

系統

半人馬座X-3距離太陽約8,000秒差距[10],是一顆典型的低質量X射線雙星。它的主星是一顆20.5倍太陽質量的超巨星(克熱明斯基星,Krzeminski's star),伴星是一顆1.21倍太陽質量的中子星[11],光度約為1038erg/s[12]

參閱

參考文獻

  1. ^ 1.0 1.1 Fuhrmeister, B.; Schmitt, J. H. M. M., A systematic study of X-ray variability in the ROSAT all-sky survey, Astronomy and Astrophysics, 2003, 403: 247–260, Bibcode:2003A&A...403..247F, arXiv:astro-ph/0303106 , doi:10.1051/0004-6361:20030303 
  2. ^ Samus', N. N.; et al, An Electronic Version of the Second Volume of the General Catalogue of Variable Stars with Improved Coordinates, Astronomy Letters, July 2003, 29 (7): 468–479, Bibcode:2003AstL...29..468S, doi:10.1134/1.1589864 
  3. ^ Ash, T. D. C.; Reynolds, A. P.; Roche, P.; Norton, A. J.; Still, M. D.; Morales-Rueda, L. The mass of the neutron star in Centaurus X-3. Monthly Notices of the Royal Astronomical Society. 1999, 307 (2): 357. Bibcode:1999MNRAS.307..357A. doi:10.1046/j.1365-8711.1999.02605.x . 
  4. ^ 4.0 4.1 Tjemkes, S. A.; Van Paradijs, J.; Zuiderwijk, E. J. Optical light curves of massive X-ray binaries. Astronomy and Astrophysics. 1986, 154: 77. Bibcode:1986A&A...154...77T. 
  5. ^ Falanga, M.; Bozzo, E.; Lutovinov, A.; Bonnet-Bidaud, J. M.; Fetisova, Y.; Puls, J. Ephemeris, orbital decay, and masses of ten eclipsing high-mass X-ray binaries. Astronomy & Astrophysics. 2015, 577: A130. Bibcode:2015A&A...577A.130F. arXiv:1502.07126 . doi:10.1051/0004-6361/201425191. 
  6. ^ 6.0 6.1 6.2 6.3 Naik, Sachindra; Paul, Biswajit; Ali, Zulfikar, X-Ray Spectroscopy of the High-mass X-Ray Binary Pulsar Centaurus X-3 over Its Binary Orbit, The Astrophysical Journal, August 2011, 737 (2): 79, Bibcode:2011ApJ...737...79N, arXiv:1106.0370 , doi:10.1088/0004-637X/737/2/79 
  7. ^ Blondin, John M. The shadow wind in high-mass X-ray binaries. Astrophysical Journal. 1994, 435: 756. Bibcode:1994ApJ...435..756B. doi:10.1086/174853. 
  8. ^ Chodil, G.; Mark, Hans; Rodrigues, R.; Seward, F.; Swift, C. D.; Hiltner, W. A.; Wallerstein, George; Mannery, Edward J. Spectral and Location Measurements of Several Cosmic X-Ray Sources Including a Variable Source in Centaurus. Physical Review Letters. 1967-09-11, 19 (11): 681–683. doi:10.1103/PhysRevLett.19.681. 
  9. ^ Giacconi, R.; Gursky, H.; Kellogg, E.; Schreier, E.; Tananbaum, H. Discovery of Periodic X-Ray Pulsations in Centaurus X-3 from UHURU. The Astrophysical Journal Letters. 1971-07-01, 167: L67. doi:10.1086/180762. 
  10. ^ Hutchings, J. B.; Cowley, A. P.; Crampton, D.; van Paradijs, J.; White, N. E. Centaurus X-3. The Astrophysical Journal. 1979-05-01, 229: 1079–1084. doi:10.1086/157042. 
  11. ^ Ash, T. D. C.; Reynolds, A. P.; Roche, P.; Norton, A. J.; Still, M. D.; Morales-Rueda, L. The mass of the neutron star in Centaurus X-3. Monthly Notices of the Royal Astronomical Society. 1999-08-01, 307: 357–364. doi:10.1046/j.1365-8711.1999.02605.x. 
  12. ^ Wojdowski, Patrick S.; Liedahl, Duane A.; Sako, Masao. The X-Ray Photoionized Wind in Cen X-3/V779 Cen. The Astrophysical Journal. 2001-02-01, 547: 973–987. doi:10.1086/318425. 

外部連結