普瑞茲畢爾斯基星
觀測資料 曆元 J2000 | |
---|---|
星座 | 半人馬座 |
星官 | |
赤經 | 11h 37m 37.04110s[2] |
赤緯 | −46° 42′ 34.8754″[2] |
視星等(V) | 7.996–8.020[3] |
特性 | |
光譜分類 | F3 Ho[4] |
U−B 色指數 | +0.20[5] |
B−V 色指數 | +0.76[5] |
變星類型 | roAp[3][6] |
天體測定 | |
徑向速度 (Rv) | ±3 +12.4[7] km/s |
自行 (μ) | 赤經:±0.051 −46.757[2] mas/yr 赤緯:±0.047 +34.024[2] mas/yr |
視差 (π) | 9.1920 ± 0.0343[2] mas |
距離 | 355 ± 1 ly (108.8 ± 0.4 pc) |
詳細資料 | |
質量 | 4.0 ± 0.1[8] M☉ |
半徑 | 1.90[9] R☉ |
表面重力 (log g) | 4.2[10] |
溫度 | 6,600[10] K |
金屬量 [Fe/H] | −2.40[11] dex |
年齡 | 56.6 ± 27.9[8] Myr |
其他命名 | |
參考資料庫 | |
SIMBAD | 資料 |
普瑞茲畢爾斯基星,又稱HD 101065或半人馬座V816,是一種快速振盪Ap星,距離太陽 355光年(109秒差距),位於半人馬座的南天球。
歷史
[編輯]1961年,波蘭-澳大利亞天文學家安東尼·普瑞茲畢爾斯基發現這個恆星有不適用於恆星分類標準框架的特殊光譜。[13][14]普瑞茲畢爾斯基發現觀測表明這個恆星的光譜中的鐵和鎳含量異常低,但如鍶、鈥、鈮、鈧、釔、銫、釹、鐠、釷、鐿和鈾等不尋常元素的含量更高。事實上,起初普瑞茲畢爾斯基根本懷疑光譜中是否存在鐵。現代研究表明,普瑞茲畢爾斯基星中的鐵系元素豐度略低於正常水平,但鑭系元素和其它不尋常的元素非常豐富。[6]
普瑞茲畢爾斯基星中也檢測到如錒、鏷、鎿、鈈、鎇、鋦、錇、鐦和鎄等多種短壽命的錒系元素,其中鎄的最長壽同位素的半衰期只有472天。該恆星中也有放射性元素鍀和鉕的存在。[15]
相較於鄰近的恆星,HD 101065的本動速度較高,為23.8 ± 1.9 km/s。[8]
假設
[編輯]由於普瑞茲畢爾斯基星的性質特殊,對於為什麼會發生這些奇怪的性質有許多假設。一個理論稱這個恆星含有某些位於穩定島的長壽命核素(例如298Fl),而這些檢測到的短壽命錒系元素是這些核素的衰變產物,與它們的母同位素存在長期平衡。[16][17]
性質
[編輯]HD 101065是快速振盪Ap星(roAP)這一類恆星的原型。1978年,人們發現它會以12.15分鐘的周期光度脈動。[18]
人們還發現了普瑞茲畢爾斯基星的一個潛在伴星,是一個距離它8角秒的14等星(紅外線波段)。這可能意味着這兩個恆星的距離只有AU(0.02光年)。 1,000 [19]然而,蓋亞任務表明雖然這兩個恆星在我們看來非常近,但我們與第二個恆星之間的實際距離是±90光年,這意味着我們與它的距離比我們離普瑞茲畢爾斯基星的距離還要遠兩倍以上。 890[20]
參見
[編輯]參考資料
[編輯]- ^ Kurtz, Don; Wegner, Gary. The nature of Przybylski's star: an Ap star model inferred from the light variations and temperature. The Astrophysical Journal. September 1979, 232: 510–519 [2021-12-04]. doi:10.1086/157310. (原始內容存檔於2021-12-04).
- ^ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051. VizieR中此天體在蓋亞望遠鏡第二批數據發佈的5372587514128271232 記錄
- ^ 3.0 3.1 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: B/gcvs. Bibcode:2009yCat....102025S.
- ^ Renson, P.; Manfroid, J. Catalogue of Ap, Hg Mn and Am stars. Astronomy and Astrophysics. 2009, 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788 .
- ^ 5.0 5.1 Wegner, G. On the reddening and the effective temperature of HD 101065. Monthly Notices of the Royal Astronomical Society. 1976, 177: 99–108. Bibcode:1976MNRAS.177...99W. doi:10.1093/mnras/177.1.99 .
- ^ 6.0 6.1 Hubrig, S.; Järvinen, S. P.; Madej, J.; Bychkov, V. D.; Ilyin, I.; Schöller, M.; Bychkova, L. V. Magnetic and pulsational variability of Przybylski's star (HD 101065). Monthly Notices of the Royal Astronomical Society. 2018, 477 (3): 3791. Bibcode:2018MNRAS.477.3791H. S2CID 55698015. arXiv:1804.07260 . doi:10.1093/mnras/sty889.
- ^ Gontcharov, G. A. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system. Astronomy Letters. 2006, 32 (11): 759–771. Bibcode:2006AstL...32..759G. S2CID 119231169. arXiv:1606.08053 . doi:10.1134/S1063773706110065.
- ^ 8.0 8.1 8.2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M., A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, January 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x
- ^ Shulyak, D.; Ryabchikova, T.; Kildiyarova, R.; Kochukhov, O. Realistic model atmosphere and revised abundances of the coolest Ap star HD 101065. Astronomy and Astrophysics. 2010, 520: A88. Bibcode:2010A&A...520A..88S. S2CID 53538833. arXiv:1004.0246 . doi:10.1051/0004-6361/200913750.
- ^ 10.0 10.1 Cowley, C. R.; Ryabchikova, T.; Kupka, F.; Bord, D. J.; Mathys, G.; Bidelman, W. P. Abundances in Przybylski's star (PDF). Monthly Notices of the Royal Astronomical Society. 2000, 317 (2): 299–309. Bibcode:2000MNRAS.317..299C. doi:10.1046/j.1365-8711.2000.03578.x .
- ^ Przybylski, A. Is iron present in the atmosphere of HD 101065. Monthly Notices of the Royal Astronomical Society. January 1977, 178 (2): 71–84. Bibcode:1977MNRAS.178...71P. doi:10.1093/mnras/178.2.71 .
- ^ V* V816 Cen. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ Przybylski, A.; Kennedy, P. Morris. The Spectrum of HD 101065. Publications of the Astronomical Society of the Pacific. August 1963, 75 (445): 349–353. Bibcode:1963PASP...75..349P. doi:10.1086/127965 .
- ^ Powell, C. S.; Wright, J. The Strangest (and Second-Strangest) Star in the Galaxy. Discover. 2017-06-30 [2017-09-10]. (原始內容存檔於2019-11-05).
- ^ Gopka, V. F.; Yushchenko, A. V.; Yushchenko, V. A.; Panov, I. V.; Kim, Ch. Identification of absorption lines of short half-life actinides in the spectrum of Przybylski's star (HD 101065). Kinematics and Physics of Celestial Bodies. 2008-05-15, 24 (2): 89–98. Bibcode:2008KPCB...24...89G. S2CID 120526363. doi:10.3103/S0884591308020049.
- ^ Jason Wright. Przybylski's Star III: Neutron Stars, Unbinilium, and aliens. 2017-03-16 [2018-07-31]. (原始內容存檔於2021-12-12).
- ^ V. A. Dzuba; V. V. Flambaum; J. K. Webb. Isotope shift and search for metastable superheavy elements in astrophysical data. Physical Review A. 2017, 95 (6): 062515. Bibcode:2017PhRvA..95f2515D. S2CID 118956691. arXiv:1703.04250 . doi:10.1103/PhysRevA.95.062515.
- ^ Kurtz, D. W. 12.15 Minute Light Variations in Przybylski's Star, HD 101065. Information Bulletin on Variable Stars. 1978, 1436: 1. Bibcode:1978IBVS.1436....1K.
- ^ Schöller, M.; Correia, S.; Hubrig, S.; Kurtz, D. W. Multiplicity of rapidly oscillating Ap stars. Astronomy & Astrophysics. 2012, 545: A38. Bibcode:2012A&A...545A..38S. S2CID 119311263. arXiv:1208.0480 . doi:10.1051/0004-6361/201118538.
- ^ Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051. VizieR中此天體在蓋亞望遠鏡第二批數據發佈的5372587509831616384 記錄
外部連結
[編輯]- Cowley, C. R; Hubrig, S; Bord, D. J. Actinides in HD 101065 (Przybylski's Star). American Astronomical Society Meeting Abstracts #202. 2003, 202: 32.09. Bibcode:2003AAS...202.3209C.
- Przybylski's Most Unusual Star (頁面存檔備份,存於互聯網檔案館)