波江座λ型變星
外观
波江座λ型變星是Be星的一類,它的光度振幅很微小,只有百分之幾的星等。它的變化非常規律,週期在0.5至2.0天之間,最初被描述為週期性的Be星[1]。波江座λ是此類變星的原形,也是範例。變化歸因於非徑向脈動,是不均勻的旋轉盤或恆星本身的旋轉[2][3]。
這種恆星不是很少被分類就是分類不正確。變星總表中還未分類出波江座λ型變星,只有仙后座γ型變星是GCAS和Be星是非GCAS。波江座λ本身也被錯誤的列為仙王座β型變星[4]。美國變星觀測者協會(AAVSO)定義了波江座λ型變星:LERI(Lambda Eridani variable)。包括波江座λ在內,16顆是波江座λ型變星,5顆疑似,13顆與其它類型變星結合在一起[5]。
參考資料
[编辑]- ^ Balona, L. A. Tests of the Pulsation and Starspot Models for the Periodic Be-Stars. Monthly Notices of the Royal Astronomical Society. 1995, 277 (4): 1547. Bibcode:1995MNRAS.277.1547B. doi:10.1093/mnras/277.4.1547
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- ^ Jerzykiewicz, M.; Kopacki, G.; Pigulski, A.; Kołaczkowski, Z.; Kim, S.-L. A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. VIII. NGC 6834. Acta Astronomica. 2011, 61: 247. Bibcode:2011AcA....61..247J. arXiv:1110.4064
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- ^ Carrier, F.; Burki, G.; Burnet, M. Search for duplicity in periodic variable Be stars. Astronomy and Astrophysics. 2002, 385 (2): 488. Bibcode:2002A&A...385..488C. doi:10.1051/0004-6361:20020174
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- ^ 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. Bibcode:2009yCat....102025S.
- ^ Otero, S. A.; Watson, C.; Wils, P. Variable Star Type Designations in the VSX. AAVSO Website. American Association of Variable Star Observers. [19 July 2014]. (原始内容存档于2020-04-11).